Glossary of Terms
Here at SGS Engineering, we understand that there's often plenty of jargon or interchangeable terms associated with many of our products. We want our product range to be as accessible as possible, so we've but together this handy Glossary of Engineering Terms that should help you get to grips with some of the language often thrown around these product ranges. Whether you're looking for help getting to grips with a gas strut, generator, air compressor, a home or garden power tools, hydraulic jacks or garage equipment - you've come to the right place! Jump to:
Categories: Air Tools, Power Tools Consumable accessories that are fitted on to various power tools for cutting, grinding sanding, etc. Also see:
Categories: Power tools Use an accessory bit with your drill or driver. Drill bits are used for drilling holes. Driving bits are used for driving fasteners. Simply loosen the chuck of your drill, insert the shank of the accessory bit and firmly tighten. Also see:
Categories: Power Tools A feature of a power saw where you can move the shoe that holds the blade, backwards or forwards, exposing more or less of the blade in the process. The shorter the blade length the easier it is to control. Longer blades can cut deeper into materials.
Adjustable / variable force gas strut
Categories: Gas Struts This variety of gas strut comes per-set to the maximum force a gas strut can take and then can be vented to the desired force by the end user. These struts are ideal for when the desired force is unknown, one off jobs and prototyping. Also see:
Categories: Air Compressors A heat exchanger that cools the air discharged from an air compressor. The discharged air/ condensate will have less moisture, thereby improving the air flow in the system.
Air cooled engine
Categories: Compressors A device that can be added to some air compressors. An air dyer removes moisture from compressed air, typically accomplished by cooling air through a refrigerator or dessicant bed.
Categories: Compressors Small leaks can create a huge loss in output and cost a small fortune in the long run. For example, a 0.75mm dia. air leakage is a loss of 1.6 CFM or an extra 300W of energy. A 1.4mm dia. hole is a loss of 6.5 CFM or 1100W! Replace faulty equipment quickly to avoid mounting costs and a lack of performance.
Categories: Compressors Used for controlling the amount of pressure received from an air compressors tank. Also see:
Categories: Compressors Holds compressed air until it is used by an air tool, etc. Sometimes called an "Air Receiver". Also see:
Air line oil
Categories: Compressors Lubricant, blended from solvent refined, napthenic base oils and additives. Use with air line lubricators for keeping your air system and tools well lubricated. Also see:
Categories: Air Tools A pneumatic staple machine, similar to a nail gun. Ideal for furniture upholstery. Comes in various gauges for varying sizes of staples. Also see:
Alternating current (AC)
Categories: Generators, SPX Electric current that increases to a maximum positive, falls back to zero, and then to the maximum negative. In a 60 hertz AC power supply the cycle is repeated 60 times.
Categories: Power Tools A hand held power tool used with a variety of disk attachments for grinding, cutting, polishing etc. Often used to cut tiles and stone, trim metal piping or similar DIY and construction tasks. The tool gets it's name from the fact that the head is mounted at a slight angle to the drive shaft. Also see:
Automatic Transfer switch (ATS)
Categories: Generators An ATS system will automatically switch from main utility power to standby, back up power from a generator, in the case of a power cut out. Also see:
(see: Transfer Switch)
Categories: Power Tools A type of drill bit used to bore (create deep holes) in wood or another material. Also see:
Auxiliary fuel pump
Categories: Garage Also called jack stands, an axle stand supports a vehicle so it can be worked under without the need of a vehicle ramp. You should never work under a vehicle supported by a hydraulic jack alone. Axle stands come in pairs and are rated for a certain capacity that should not be exceeded. Also see:
Categories: Garage Used in SGS tool chest drawers, hard steel balls run in precision troughs, providing an incredibly stable and easy to use drawer action, even with heavier loads. Also see:
Categories: Gas Struts A common type of end fixing used with gas struts. Ball sockets clip onto a bracket with a ball stud on it and enables a gas strut to be mounted at an angle with-out side loading. Available in steel and plastic. Also see:
Categories: Gas Struts A common type of end fixing used with gas struts. These joints use a spherical bearing that connects to a control arm to allow for lots of movement around a central point. Ball studs are recommended for most applications as they allow the gas strut to be mounted at any angle. Available in steel and plastic. Also see:
Bed hinge mechanism
Categories: Gas Struts Bed mechanism consist of a pair of hinges to mount to the bottom and top of a bed together and a pair of gas struts to provide assistance raising and lowering the bed, usually for extra storage. Also see:
Categories: Power Tools A cut made at an angle to a work piece, usually done with a mitre saw (however some jig saws have a bevel feature). Also see:
Categories: Power Tool The metal accessory that goes into a drill's tip (or chuck). There are specific bits for drilling and driving. Also see:
Black oxide bits
Categories: Power Tools High speed steel drill bits with a black oxide finish which is created by a combination of chemicals and heat during the manufacturing process. Because of this finish, they have a higher resistance to rust and stay sharper longer. Use for general purpose drilling. Also see:
Categories: Power Tools The part of a saw that holds the blade in place. Most blade clamps are tool-less and spring loaded. Always unplug (or remove the battery) from a saw before you try to change the blade, or adjust a blade clamp. Always check that blade is properly secured and not loose in the clamp. Never work with a loose blade!
Categories: Power Tools The section of the blade that is held within the blade clamp. You should double check what type of blade shank your saw takes before you purchase a new blade. Also see:
Categories: Gas Struts The hinged metal canopy covering the engine of a vehicle, sometimes supported by a gas strut. Also see:
Categories: Gas Struts The hatch at the rear of a vehicle, sometimes called a tailgate. The hatch is opened and closed for loading or unload a vehicle. Gas struts are often used to help lift a car boot open and close with minimal effort. Also see:
Categories: Garage A type of hydraulic lifting jack where the piston ram extends from a cylinder. They are compact and can be rated for huge loads. Also see:
Categories: Gas Struts Used to mount a gas strut to an application. Also see:
Categories: Power Tools A type of drill bit that has three small points at the tip that prevents the bit from moving when you start drilling. Use these bits for precise drilling. Also see:
Categories: Generators, Compressors A conductor (usually made of carbon, i.e. carbon brushes) serving to keep an electrical connection between the stator and rotor within a machine, such as a generator.
Car gas struts
Categories: Gas struts Also know as car gas springs or tailgate struts. Nitrogen filled, cylinder and piston designed as a like-for-like replacements for original car gas struts. The purpose of a car gas strut is to assist with supporting the weight of a heavy hatch. Gas struts can be found all around a car, including the boot, tailgate, bonnet, doors and windows. Always match the part numbers from your original struts with SGS equivalents. Also see:
Categories: General "CE" is the abbreviation for the French "Conformité Européene" - or European Conformity. All SGS products fully conform to, or exceed, relevant European standards and therefore are CE marked.
Categories: Gas struts The measurement of gas strut taken between the centre of one end fixing to the centre of the other end fixing when fully extended. Also see:
Compound mitre saw
Categories: Power Tool A power tool for wood working, that is capable of cutting compound angles. These saws can cut angles of up to 45 degrees, either side in relation to a vertical fence. The blade can be angled or tilted in relation to the machine base. Also see:
Compressor oil (AC 2068)
Categories: Compressors ISO VG 68 oil for reliable and effective lubrication for compressors. Also see:
Constant speed control
Categories: Generators The output a generator can can maintain for long periods of time, assuming maintenance and servicing is kept up with. Not all generators are suitable for continuous use. Also see:
- Generator Buyers Guide: Which Generator Should I Order?
- Typical Power Ratings of Common Electrical Equipment
Cordless power tool
Categories: Power Tools A type of power tool that has it's own source of power, usually a rechargeable lithium-ion battery, Also see:
Categories: Garden A rounded file for sharpening a blunted chainsaws chain. A chain file is provided with every SGS chainsaw in the toolkit. Also see:
Categories: Garden Lubricating oil for chainsaws (and similar tools). Improves chain life, safety and reduces chain drag. Density @ 15°C 0.880 / Viscosity @ 40°C 130 cSt / Viscosity @ 100°C 14.5 cSt Also see:
Chainsaw/ chain saw
Categories: Power Tools The cylinder that opens and closes the jaw of a drill that allows you to fit a drill bit. (see: Bit).
Categories: Power Tools The section at the very tip of a drill that holds a bit in place.
Categories: Power Tools A tool designed for loosening and tighten the chuck of a drill for you can inset an accessory bit. Many modern drills are "Tool-less Chuck" or "Automatic Spindle Locking" meaning you don't require any additional tools to loosen or tighten the chuck - it can be done by hand.
Categories: Garage The measurement of hydraulic jack, going from it's lowest point to it's highest point when the jack is fully decompressed. The measurement can be used to make sure a hydraulic jack will fit under your vehicle. Purchase a hydraulic jack that has a closed height less than the ground clearance of your vehicle. Also see:
Categories: Power Tools The coarser the grit of your sand paper the rougher the texture is. Coarse sand papers have a lower grit rating (40 or 80 grit). Use coarse grit paper is for removing more stock material and gives a rougher finish.
Categories: Power Tools A combination of a Mitre cut and a Bevel cut. This is a useful cut for doing crown moldings around a door or a window. Simply set both a mitre level and bevel angle on your mitre saw.
Categories: Garage A mechanics creeper is a low profile frame supported by caster wheels used for working underneath vehicles comfortably. Also see:
Categories: Power Tools Normally done with a jig saw or a hand saw, a curved line in a piece of material. Might be useful for wooden decorations. Use a high speed setting and apply only a light amount of pressure as you go around your cut line. If the cut is at a particularly sharp angle you may wish to make relief cuts to help with the blades performance.
Certificate of conformity (CoC)
Categories: Gas Struts, General Sometimes known as a Declaration of Conformity, A formal declaration by a manufacturer, that the product to which it applies meets all relevant requirements of all product safety directives applicable to that product. It is a sign that a product has been designed and constructed for compliance with relevant essential requirements, and has been through the appropriate conformity assessment processes. You will normally find a CoC for SGS products in the back of an instruction manual (available on each individual product page). You can find a Certificate of Conformity for SGS Gas Struts here. If you can't find a certificate for your product you can contact SGS for a copy of the certificate.
Cubic feet per minute (CFM)
Categories: Compressors A unit of measurement of volumetric air flow displaced by an air compressor under a certain condition. CFM can be thought of as the capacity of an air compressor. The higher the CFM of an air compressor the more tools you'll be able to run. Also see:
Cut line indicator
Categories: Power Tools Notches in the front of the base of a saw that show you where your blade will go. Some cut line indicators are more accurate than other so make sure to get familiar with how your saw works and performs.
Categories: Gas Struts The part of a gas strut that the rod protracts into, containing oil, nitrogen gas and pressure. The cylinder provides the pressure for the rod. The fatter end of a gas strut. (see: Cylinder End, Rod)
Data Sheet (dB)
Categories: Gas Struts A technical data sheet for SGS gas struts can be found here.
Categories: Generators, Compressors, Power Tools, SPX One-tenth of a Bel (B). A unit of measurement for noise. The hearing threshold (i.e. the lowest noise a human can hear)is 0dB. The threshold of pain (i.e. the loudest noise a human can ear can tolerate) is 140dB. This measurement should help you choose a machine that is appropriate for your working environment.
Categories: Gas Struts SGS Engineering offer a free gas strut design service which will enable you to lift almost any flap, panel or hatch with a controlled motion. To take advantage of the design service you can fill out the form here. The free design service is not available in conjunction with any other offer.
Diamond saw blade
Categories: Generator Diesel generators are more suited to regular use and commercial applications. Many diesel generators are portable and can be fitted with wheel kits. The cost of running and maintaining a diesel generator can be significantly less than a petrol alternative. Also see:
Direct current (DC)
Categories: Compressor The displacement of a compressor is the theoretical capacity of a compressor, i.e. the swept volume of a cylinder multiplied by the number of compression's per minute. This is expressed in CFM (Cubic Feet Per Minute).
Categories: Power Tools A power tool with two modes or more, capable of boring holes (drilling) and fixing fasteners (driving). Also see:
Categories: Power Tools An accessory for a drill used for making holes in various materials. For help choosing the right drill bit see:
Driving / Screw-driving bit
Categories: Power Tools An accessory for a drill or driver used for driving fasteners, such as screws, into various materials via a series of interchangeable bits. They come in a variety of shapes such as Philips, Slotted, Torx etc. For help choosing the right driver bit see:
Categories: Power Tools A popular feature of high end sanders and saws that use a vacuum to pick up waste material. Dust collection helps to keep the work piece visible, improving the finish of your cut / sanded material.
Categories: Garage Used in SGS tool chest drawers. Heavy duty, non-slip mats, designed to stop tools slipping around when opening and closing the drawers. Also see:
Categories: Gas Struts Typically attached to each end of a gas strut for mounting to an application. SGS end fixings come in a huge array of sizes, as well as plastic and stainless steel. (see: Ball Sockets, Ball Studs, Eyelets, Clevis Folk) Also see:
Categories: Garage Also known as an engine hoist, an engine crane is a repair and maintenance tool used to remove or install engines and similar components. Engine cranes have caster wheels so you can move the part once you've removed it from a vehicle. (see: Engine stand / transmission stand, Load Leveller) Also see:
Engine displacement (CC)
Categories: Compressors, Generators, Garden, General The volume swept by the pistons inside a reciprocating engine, in one complete movement. Measured in cubic centimetres (cc or cm3), litres (l), or cubic inches (CID).
Engine stand / transmission stand
Categories: Generators, Compressors Can be used to secure and work on engines and similar vehicle parts, once they've been removed. (see: Engine cranes) Also see:
Categories: Generators, Garden A reliable starting mechanism that doesn't require moving parts for firing to the spark-plug Also see:
Categories: Gas Struts, Compressors A type of protective coating used to make a product chemical or solvent resistant. SGS gas struts and many medical compressors have epoxy coatings for adding protection.
Categories: Gas Struts A common type of end fixing with a round hole in it, often found on a gas strut. Used for mounting a gas strut onto a a bolt or pin. Eyelets are mounted "offset" whereas Clevis Fork fixings are mounted "in-line". Available in steel or plastic. See the full range of SGS eyelets here. (see: Clevis Folk)
Categories: Power Tool Referring to smoother sandpaper, fine grit is less coarse paper for finer finishing and less stock removal. The higher grit rating a piece of sand paper has the smoother it is (typical values include, 220 to 300 grit).
Categories: Air Tools, Power Tool A pneumatic nailer suitable for small finishing nails. Ideal for furniture or similar. Also see:
Categories: Gas Struts A fitting guide is provided with every set of vehicle gas struts purchased You can see a copy of the gas strut fitting guide here.
Fixed force gas strut
Categories: Gas Struts A type of gas strut sold with a set Newton force of between 50 - 2500N. SGS can set the force as required, however once these gas struts have been shipped, the force cannot be altered or adjusted by the end user. Also see:
Categories: Gas Struts Measured in Newtons (N), describes the potential pushing strength a gas strut can exert when correctly mounted. SGS can add Force to a strut, however Force can not be removed unless you have an adjustable gas strut.
Categories: Air Tools, Power Tool A pneumatic nailer that drives large framing nails. Also see:
Free Air Delivered
Categories: Power Tool Cutting a piece of material or a fastener like a screw, so is lies flat against the surface of another material. Flush cuts are useful for tidying up rough work.
Categories: Generators A special socket that converts one type of output to another, for example a 16A power supply to a 13A power supply. It is safe to use a series of fly leads, for example a typical set up might be: Generator -> 32A Lead to Socket 16A -> 16A Lead to 13A Socket -> Electrical item. Also see:
Categories: Power Tools, Air Tools Sometimes called Idle RPM. The speed a tool moves without any resistance, (i.e. when the trigger is pulled but not working against a material). Normally measured in RPM.
Fuel ratio / fuel mixture
Categories: Garden Two-stroke garden tools require you to mix petrol with 2-stroke oil. The individual fuel ratio of every garden tool can be found in the product manuals. Strimmers 40:1. Chainsaws: 25:1. Hedge Trimmers: 40:1. Also see:
Categories: Generators A protective device in an electrical circuit. It is made up of a conductor that melts and breaks the electrical circuit if a current of electricity passes through a system that is higher than the system's rated value.
Categories: Power Tools The switch, normally on the top of a power tool, that lets you choose between the highest speed, or the highest torque. (see: Torque)
Categories: Generators Converts mechanical energy into electrical energy. Also see:
Grass strimmer / trimmer
Categories: Garden A mechanically driven garden tool, using a flexible monofilament line instead of a blade. Usually this tool is used on grass and plants on steep or uneven ground. Also see:
Categories: Generators Commercial power from the electric grid (National Grid - UK). Generators can be used to power almost anything in a situation when grid power is compromised. Also see:
Categories: Generators A connection between an electric circuit and either the earth or a conducting body that acts in place of the earth. Most portable petrol generators are self grounding, including the SGS Engineering SPG Series.
Categories: Garage A hydraulic vehicle jack that has a larger than average lifting range, designed for vehicles that sit higher from the ground, like 4x4s and vans. Also see:
- How To Buy The Right Trolley Jack
- How To Lift Your Vehicle With A Trolley Jack & Axle Stands
- Garage Equipment » Trolley Jacks
Horsepower / Brake Horsepower (HP)
Categories: Generators, Compressors, Garden, SPX A unit measuring power / the rate at which work is done, normally of an engine or motor. The higher the horsepower the more powerful the engine or motor.
Categories: Generator Inverter generators use pure sine wave technology to create a "clean" energy output suitable to sensitive electrical items like a TV, computer, phone or anything else with a microprocessor. Inverters are often used for leisure applications, such as camping. Also see:
Categories: Power Tools, Garden Tools When a power tool is forced back towards the user, normally at speed. Particularly apparent with tools like chainsaws and power-saws. Kickback can cause serious damage to the operator if it catches them by surprise. Tips for minimizing kickback:
- If possible, clamp the material you're working on
- Keep a firm, two-handed grip on your power tool at all times
- Keep a stable, firm stance when working with a power tool
Categories: Power tools A heavy duty fastener used for structural support in serious wood working projects. You might use these screws when building a deck or putting up a stud wall.
Categories: Garden Also known as a blower. A mechanically driven garden tool designed to move leaves, grass clippings and garden debris, making it easier to remove. Also see:
Categories: Power Tools A useful feature of many power saws. A laser guide shows where the blade will land before making a cut. Make more accurate cuts, quicker with a laser guide on your jig saw / mitre saw.
Line pressure gauge
Categories: Generators Dual fuel generators that can run off either petrol or liquefied petroleum gas (LPG). LPG generators are cheaper to run than petrol, better for the environment and ideal for leisure users who already have access to LPG gas bottles - such as campers. Also see:
Categories: Power tools Lithium batteries are fast charging, long running and fade-free, making them an ideal power source for power tools. They are the natural successor to older Ni-Cad batteries. Also see:
Categories: Garage An accessory for an engine crane, designed to help remove and replace engines / motor-parts at difficult angles. Also see:
Categories: Gas struts An optional extra on many gas struts, a locking tube keeps a gas strut extended, even if the gas strut was to fail. To release you need to pull the locking mechanism on the locking tube. A locking tube will also act as a protection cover. Also see:
Categories: Garage A hydraulic jack with a greater than average reach, meaning wider vehicles and vehicles with more difficult to reach jacking points, are easily accessible.
- How To Buy The Right Trolley Jack
- How To Lift Your Vehicle With A Trolley Jack & Axle Stands
- Garage Equipment » Trolley Jacks
Low oil shutdown
Low profile jack
Categories: Garage A hydraulic jack designed for vehicles with very low ground clearance.
- How To Buy The Right Trolley Jack
- How To Lift Your Vehicle With A Trolley Jack & Axle Stands
- Garage Equipment » Trolley Jacks
Categories: Power Tools Drill bits with a carbide tip used to drill holes in brick, mortar, block and concrete. Also see:
Categories: Compressor Specialist air compressors for clinical, dental, medical applications. Typically oil-less and coated in epoxy paint for cleaner air outputs. Also see:
- Air Compressor Buying Guide: Which Compressor Should I Order?
- Air Compressors » Medical & Specialist Compressors
Categories: Power Tools A cut made at an angle, usually with a Mitre Saw. Often used for skirting boards, door trim, base boards and moldings. Also see:
Categories: Power Tools A power tool named after a mitre joint. Used to make cuts across the length of a piece of timber at various angles. Also see:
Categories: Compressors, Power Tools, Hydraulics, General A machine thats supplies motive power to another device. Normally when we talk about a motor, we're talking about electrical power. An engine will normally describe a liquid fuel powered motor.
Categories: Gas struts Mounting instructions are sometime provided when a gas strut is designed for a new application via the SGS design service. Mounting instructions are specific for every application and emailed after a custom gas strut is shipped. These instructions may carry an additional charge.
Categories: Gas Struts A measurement of force (SI), named after Isaac Newton. One Newton is the force required to accelerate one kilogram of mass at the rate of one metre per second squared in a the direction of the force applied. Gas struts will be pressurized to a specific Newton value depending on the weight and nature of an application. The Newton force of your gas strut can normally be found printed on the gas strut itself - for example, 250 N.
NGK Spark Plug
Categories: Garden A highly reliable brand of spark plugs, found in SGS petrol garden tools.
Ni-cad battery (nickel cadmium)
Categories: Power Tools Older battery powered tools were powered by Nickel Cadmium batteries - or "Ni-Cad" batteries. Compared to Lithium-ion alternatives, Ni-Cad power tools take longer to charge and have a fade effect, meaning as the battery decreases, so does the power of your tool.
Nitride plate steel
Categories: Gas Struts A heat-treated type of steel that diffuses nitrogen into the metals surface, creating a hardened surface. The SGS standard range of gas struts are made from Nitride plate steel. (see: Stainless-steel 316)
Categories: Gas Struts NitroLift is a gas strut brand designed and manufactured by SGS Engineering in the UK. Also see:
- How To Fit Gas Struts To Just About... Anything!
- How To Fit and Remove Tailgate Gas Struts
- Ordering The Correct Gas Strut for Your Camper/ Recreational Vehicle
- Gas Struts & Gas Springs
Nut Driver Bit
Categories: Power Tools A type of drill/driver bit for driving nuts, bolts and hex head fasteners. Also see:
ONE+ (One Plus)
Categories: Power Tools The Ryobi series of 18V battery powered power tools. Each lithium-ion battery is capable of being used with any of the tools in the range (50+ home and garden power tools). Batteries are available with capacities of between 1.3Ah and 5.0Ah batteries. Also see:
Categories: Power Tools Simply, this term means to move back and forth. Many different power tools use an oscillating head in order to cut or sand. Also see:
Categories: Power Tools A versatile power tool that uses an oscillating head to cut, saw, sand and scrape depending on the accessory you've chosen. The "Swiss army knife" of the power tool world. Also see:
Categories: Power Tools The angle telling you how far the a tool moves from side to side per oscillation. The higher the oscillation angle the more aggressive the tool. For example, a multi-tool with an oscillation angle of 2.5° will have a greater level of precision than a tool with an angle of 3 degrees. On the other hand the tool with 3 degrees of oscillation will cut quicker. Also see:
Categories: Power Tools A woodworking power tool. A specialist sander that has an orbital head for a fine finish. Also see:
Categories: Power Tools Measured in oscillations per minute (OPM), the higher the oscillation rate, the more power the tool has and the more work the tool will do. Also see:
Oil Free / oil-less Compressor
Categories: Compressor A type of air compressor that has no oil in the compression chamber for lubrication, cooling or sealing. They require little maintenance and reduce the amount of contaminants in the displaced air flow, making them ideal for medical or food processing applications. Also see:
Overhead valve (OHV)
Categories: Generators, Garden A type of engine configuration where the valves are above the combustion chamber in the cylinder head, instead of to the side of the piston within the engine block. The benefits of an OHV layout includes;
- Smoother fuel mixture
- Quicker and more complete exhaust
- Better thermal balance (which helps for improved emissions, decreased oil usage and increased engine life)
Categories: Gas Struts Sometimes referred to as OEM number. We recommend finding the part number printed on the side of your old gas strut to ensure you order the correct struts for your car or application. You can use the search bar on any page of the website to look up the correct gas strut for your replacement gas strut. If your gas strut doesn’t have a part number or you would like assistance selecting a new gas strut for your vehicle please contact our sales team or call 01332 576 850 Mon-Sat, 8am to 5pm Also see:
Categories: Power Tools A drill with an on/off hammer option for drilling small holes into masonry. You can also drill woods and metals in the same way you can with a standard drill driver Also see:
Categories: Power Tools Use a pilot hole to prevent wood from splitting when you're drilling or driving. Make your hole with a small drill bit a little way through the piece you're working on. Now you're ready to use a larger drill bit for the actual hole you want or drive the appropriate fastener. Also see:
Categories: Generator Petrol generators are inexpensive portable power solutions designed primarily for back-up and hobbyists. They range from 1KVA to around 10KVA Also see:
Categories: Compressors, Hydraulics, Garage Equipment, General A short cylinder or disc that fits within a tube that can move up and down against a liquid or gas. Pistons are used in reciprocating engines, reciprocating pumps, gas compressors and pneumatic & hydraulic cylinders, and many other similar mechanisms. The motion of a piston going up and down is usually converted into rotary motion via the means of a connecting rod.
Pointless (CDI) ignition
Categories: Garden A system of engine ignition that uses a high voltage pulse from the trigger to the the coil, via a CDI unit. The coil amplifies the pulse from the CDI unit, giving you more reliable ignition.
Categories: Garden Also known as a power washer. A mechanically powered high-pressure, mechanical water sprayer. Often used to remove dirt, mold, paint, grime and mud from buildings, concrete surfaces and vehicles. Many can be customised with accessories such as flat surface cleaners and sand blasting kits.
Professional / industrial air compressor
Categories: Compressors A high duty cycle air compressor designed for demanding every day use. Always make sure your air compressor has a high enough CFM output for your tool. Also see:
Categories: Power Tools Also known as a "thickness planer", or even a "thicknesser". A power tool designed for woodworking that uses a single cutting head to shave (plane) timber to a parallel depth and thickness. Also see:
Plunge cut / Pocket cut
Categories: Power Tools A cut made on the inside of a work piece with no edge to start from. You might use this type of cut for cutting out a hole for a wall socket or a floor vent. Reciprocating saws and multi-tools are ideal for this type of cutting work. (see: Reciprocating saw, Oscillating Multi-Tool)
Categories: Compressor This is the force / power in the compressed air system. This will be expressed in PSI or bar. The maximum pressure is important because if you have too low a pressure your air equipment will not work correctly. If the pressure is too high it will quickly wear out your air equipment. Failing that, make the equipment dangerous to use. Most compressors will allow you to regulate the working pressure for the equipment you're using.
Categories: Compressors, Hydraulics Compressors - The component that compresses the air and pushes it into the tank. Hydraulics - The component of a hydraulic system that builds pressure to move hydraulic liquid around a system.
Purge / air purge
Categories: Compressors, Garage, Hydraulics The removal of undesired liquid or gas from a system. Also see:
Categories: Air Compressors, Generators, SPX The number of complete voltage and/or current sine waves generated per 360 electrical degrees. Each phase requires a complete set of windings. Generators will normally either supply a single-phase or three-phase power supply. For help choosing a single phase or three phase generator have a look at our Generator Buying Guide. Air Compressors will require either a single-phase or three-phase power supply. For help choosing the right phase compressor, have a look at our Air Compressor Buying Guide.
Portable generator set
Categories: Generators The ratio of the actual electrical power in an AC circuit to the product of the RMS (root-mean-square) values of current and voltage. The difference between the two is caused by reactance in the circuit and represents power that does no useful work.
Categories: Compressors, Hydraulics Force per unit area - normally measured in bar or PSI. Air tools will have specific working pressure requirement which you need to make sure you air compressor can produce before you make a purchase.
Categories: Gas struts An optional extra on many gas struts, a protection cover keeps a gas strut free from moisture, dirt and grease, prolonging the life of a strut. Protection covers are particularly useful in dirty environments. A locking tube will also act as a protection tube. Also see:
Ratchet / farm jacks
Categories: Garage A type of hydraulic jack suited to lifting, pushing or spreading machinery, 4x4s, tractors, wire fences, posts, etc. Also see:
Rail approved generator
Categories: Generators Generators Network Rail approved for usage in and around railways. SGS Engineering is one of only a few UK suppliers of Rail Approved generators Also see:
Rated AC output
Also know as, Rated Power Categories: Generators The net electric output a generator can provide on a continuous basis. The rated output of a generator takes into account some head room. Where as Rated AC Output can be thought of as average power usage, Maximum Rated Power is the very highest output a particular generator can produce. When you're choosing a generator ensure the output requirements are the same as or below the Rated AC Output of the generator. Have a look at our Generator Buying Guide for more help. Also see:
Retaining pin / ball stud pin
Categories: Gas Struts A simple pin clip used for securing ball sockets or stud. Supplied with all ball sockets and studs sold by SGS. Replacement pins can be purchased here.
Categories: Gas Strut Also know as piston rod. The protruding ram/arm of a gas strut. The rod sits inside the cylinder of a gas strut when it is compressed. (see: Rod end, Rod diameter, Cylinder, Stroke, Piston Rod)
Categories: Gas Strut The thinnest end of a gas strut. The side of a gas strut the rod protrudes from. Typically fitted with an end fixing such as a ball socket or eyelet.
Rotary screw compressor
Categories: Compressor A compressor which utilizes inter-meshing rotors to trap air and compress it to a high pressure. Rotary screw compressors can be run at lower temperatures for 24 hours per day, 365 days a year.
Categories: Gas Struts SGS Engineering have developed a unique system of re-pressurizing old gas struts for significant savings over purchasing new replacements. The process is greener, cheaper and guaranteed for one-month, but will often last for years. You can get a quote for re-gassing a strut here.
Categories: Compressor Another word for an air tank on a compressor. The larger the receiver the the more gas can be stored under pressure.
Categories: Generators A unit of measurement representing resistance. One volt causes a current on one ampere to flow through a resistance of 1 Ohm.
Revolutions per minute (RPM)
Categories: Generators, Power Tools, Garden, Air Tools, SPX The amount of times something (usually and engine or motor) rotates in a single minute. Generators will usually come with 3000 RPM engines or 1500 RPM engines. As a rule, the lower the RPM the longer life you can expect from your generator and the less maintenance you should expect to do. Have a look at our Generator Buying Guide for more help. Power and Air Tools will often have Free Load Speed measured in RPM, giving you an indication of the power of the motor the tool uses. The higher the RPM the more affective a tool.
Right angle drill
Categories: Power Tools A specialist power drill that has the chuck pointing at a right angle to the shaft. Very useful for drilling at difficult angles and getting into spaces a conventional drill cannot. Also see:
Rocket lift jacks
Categories: Generators The rotating part of a generator (or motor). (see: Stator)
Rotary hammer drill
Categories: Power Tools A specialist power drill for drilling larger holes in masonry and concrete. Many rotary hammer drills have chisel settings. Also see:
Categories: Garage The top most section of a hydraulic jack which will touch the underside of a vehicle as you lift it. Some saddles can used with jacking pads to protect the underside of you car. Others have special ports to you attach accessories like a jacking beam. The larger the diameter of a saddle the more evenly spread the lifting force will be, thereby minimizing the possibility of damage to the underside of a vehicle.
Categories: Compressor A compressor ideal for a serious hobbyists or undemanding professional applications. Lower duty cycles than a professional compressor, but powerful enough for most air tools. See CFM output to be sure you're choosing the right compressor for the job at hand. Also see:
Categories: Power Tools A type of cut for making shapes and curves in a material, often used for making wooden ornaments. The most intricate the shape, the harder this cut is to perform. Use a high cutting speed and a scrolling blade with a high TPI.
Categories: Power Tools A type of fastener that makes its own hole when it's driven - used for sheet metals.
Categories: Power Tools The part of a saw that rests against the material you are cutting. The shoe should always be flat against the material you're working on. It reduces the vibration of the saw and gives you enhanced control
Also know as, A short or s/c Categories: Generators An unintentional electrical fault where the passage of the current takes an undesirable path, rather than reaching the desired output. A short circuit can be dangerous, outputting thousands of times the normal operating current in just a millisecond. Fuses, circuit breakers, or overload protection all help to protect against excessive current. Many electrical faults are wrongly described as a "Short circuit". (see: Fuses, Circuit breakers, Overload protection)
Categories: Generators, Air Compressors, SPX A single-phase generator (or single-phase alternator) produces a single, continuously alternating voltage. These generators can be used to generate power in single-phase electric power systems. Single phase generators tend to have a maximum output wattage of under 40 kVA. Have a look at our Generator Buying Guide for more help. A single-phase Tool such as an air compressor, will have a single-phase engine or motor and require a single-phase power source. (see: Three-Phase, Phase)
Single stage compressor
Categories: Compressor A single stage compressor has one or more cylinder. If there is more than one, both cylinders are the same size. It is not recommended for operating pressures exceeding 100 PSI / 7 bar except if the tool will be used intermittently.
Shade bit / paddle bit
Categories: Power Tools A large, flat drill bit used for making larger holes in a material. Also see:
Sliding compound mitre saw
Categories: Power Tools A woodworking power tool that is capable of cutting compound angles. In addition it has a sliding function that allows it to cut wider pieces of timber than a standard drop saw.
Categories: Gas Struts A large supplier of gas struts. SGS can manufacture gas struts that are direct replacements for Stabilus original parts, that require no additional modification for fitting. Also see:
Stainless steel 316
Categories: Gas Struts A steel alloy containing chromium. Ideal for corrosive or sterile environments such as medical or marine settings. 316 stainless steel has no electromagnetic field and poses no fire risk. (see: Nitride-plate steel) Also see:
Categories: Generators That static part of a generator (or motor). (see: Rotor)
Categories: General, Gas Struts The stroke of a hydraulic component refers to the overall distance the cylinder/rod will travel to perform it's work (lifting or moving an object). From a fully closed to a fully open position, the total length of travel of the cylinder is its stroke. If a cylinder travels 500mm from its fully closed position to a fully open position, we say that the cylinder has a stroke of 500mm. It's often stated that stroke is the overall length of a cylinder, however in reality it is only a measure of how far the piston will extend from its external tube.
Sub flush screw
Categories: Gas Struts The rear, hinged hatched at the back of a vehicle that can be moved up or down when loading or unloading a vehicle. Gas struts are often used to lift or a tailgate. Also see:
Categories: Teeth When talking a blade, "T" will stand for Teeth. For example, 24T, 40T, etc. You might also see TPI which means "Teeth per Inch". As a rule, the higher the "T" or "TPI", the smoother the cut. Lower "T" or "TPI" will mean a rougher cut. Keep it simple:
- 80T- cutting hardwoods
- 40T - Cutting base boards
- 24T- Cutting 2x4s
If you're working on building something like a shelf, where the edges don't matter as much, you can use a lower teeth rating to get the work done faster. If you want a better finish on something more delicate, use a blade with more teeth for a cleaner cut.
Categories: Garage A hydraulic jack with a piston that retracts and lifts in sections, allowing for a larger lifting range.
Categories: General, Gas Struts The helical structure that wraps around a section of a cylinder or cone used for fastening. Screws, nuts and bolts all have threads. Gas struts will have threaded ends that allow an end fixing to be attached. A bolt and gas strut is male threaded. A nut and end fixing is female threaded. ISO metric screw threads are used throughout the SGS product range.
Categories: Generators, Air Compressors, SPX Three complete, separate sine waves spaced 120 electrical degrees apart. A three phase generator produces three-phase power output, making it ideal for powering heavy loads. Three phase generators tend to be more economical than single phase generators. Have a look at our Generator Buying Guide for more help. A three-phase Tool such as an air compressor, will have a three-phase engine or motor and will require a three-phase power source. (see: Single Phase, Phase)
Titanium Coated Drill Bits
Categories: Power Tools High speed steel drill bits with a titanium-nitride protective coating, designed to help the drill stay cooler when in use. Particularly useful when drilling in metal. These accessory bits stay sharper longer and can be used for general drilling applications. (see: Bit)
Categories: Garage Similar to a standard bottle jack, however the toe-lift feature and swivelling pump handle socket of a toe jack make them ideal for machinery lifting and positioning
Categories: Power Tools A measurement of twisting force, often used to describe the power of a power tool. The higher the torque the more aggressively a tool will turn. High torque means the tool is turning a bit very hard.
TPI (Teeth Per Inch)
Categories: Power Tools A way of measuring the teeth on saw blades. Saw blades are rated by TPI and depending on what you need to cut, you may need to have a collection of wood blades, plastic blades, and metal blades with varying TPI's. (see: Teeth (T))
Transfer switch (TS)
Categories: Generators A device that switches a power load from the main utility power source to a standby source, such as a generator. Also see:
Categories: Garage A type of hydraulic vehicle jack that uses pistons to convert the downward force from a handle, to upward force of the ram.
Tubular pin tumbler lock / tubular lock
Categories: Garage A component of many SGS tool chests, this locking mechanism uses 8 pins arranged in circular patten for a high level of storage security. Also see:
Two stage compressor
Categories: Compressor A compressor with a minimum of two cylinders. One cylinder will be smaller than the other, making it easy to identify the difference between the two types of compressors. Two-stage compressors are recommended where operating pressure exceeds 100 PSI / 7 bar or when tool usage is continuous. Normal operating pressure of a two-stage compressor is 175 PSI / 12 bar.
Categories: Garden Also known as a two-cycle engine. A type of combustion engine that completes a full power cycle with two strokes (up and down) during one crankshaft revolution. Commonly used in petrol powered tools. The fuel requires two stroke oil to be mixed into the petrol.
Categories: Garden Also know as a two-cycle oil. A special type of motor oil intended for the use in two-stroke engines. Different tools will require different mixes of two-stroke oil to petrol ratios, so you need to check in your instruction manual before you attempt to mix two-stroke oil with your fuel.
Categories: General Orders over £100 ex VAT will automatically have free delivery applied when you add to basket if you live within the mainland, UK. Unfortunately this offer only extends to web orders with a delivery address in the UK mainland – N Ireland, Ireland, parts of Scotland, Highlands and Islands and International delivery addresses will have their exact carriage cost calculated during checkout. Also see:
Categories: Gas struts SGS Engineering offer a unique service where an existing gas strut can have the force increased. This is useful for applications where additional weight has been added to an existing application, such as adding a bike rack or spoiler to a car boot. Also see:
Variable Speed Trigger / Variable Speed Adjustment
Categories: Generators A unit of measurement that denotes electromotive force. When this force is steadily applied to a conductor where the resistance is one ohm, it will produce one ampere.
Categories: General Ever product on the SGS website will have a warranty that covers manufacturing faults within a certain time period. SGS products will usually have a 2 year extended warranty, however tool chests have a 10 year warranty. You can see the individual warranty of each product on a product page under the technical specification. Also see:
Categories: Generators A unit of measurement denoting electric power. In a direct current (DC): watts = volts x amperes. In an alternating current (AC): watts = effective amps x power factor x a constant dependent on the number of phases. 1000 watts (W)= 1 kilowatt (kW)
Categories: Generators Specially designed generators for welding applications. Also see:
Categories: Generators Larger generators, typically use high end engines designed for accommodation or welfare units. Also see:
Categories: Garage A low profile cart with small caster wheels for moving heavy vehicles around a workshop or garage. They come in sets of twos or fours. Also see:
Categories: Garage A low profile frame with small caster wheels for moving heavy vehicles around a workshop or garage. They come in sets of twos or fours. Also see:
Categories: Garage Wedges of sturdy material, such as rubber, plastic or metal, designed to stop a vehicle from moving when placed under the wheel They come in sets of two. Also see:
Whirl-away surface cleaner
Categories: Garden An accessory or a pressure washer that makes it easier to clean flat surfaces such as concrete floors, driveways, etc.