A bearing is a machine element. Its function is to facilitate all movements in a machine. Bearings are placed between interconnected machine elements. They provide the transfer of force and rotational motion. They also minimize friction between machine parts.

Ball Bearing

Bearing races must be kept separate to work. A ball bearing uses balls to maintain the separation between the bearing races. It supports radial and axial loads and reduces rotational friction. .  Ball bearings are used in small load applications.

Tapered Roller Bearing

A tapered roller bearing is used to bear combined loads and provide low friction during operation. Tapered roller bearings have a cup and a cone. The cup is the outer ring and the cone assembly consists of an inner ring, rollers, and a cage

Straight Roller Bearings

Straight roller bearings can be found in applications like conveyor-belt rollers to hold heavy radial loads. These bearings run in cylindrical raceways. They have low-friction, high-radial load capacity, and high-speed capability.

Spherical Roller Bearing

Roller bearings are used in systems under overloads and impacts. They provide high rotational speeds. Roller bearings support rotating shafts and wheels. These bearings transfer loads between rotating shafts and wheels.

Adapter Sleeves

An adapter sleeve is used to tighten the round nut and the bearing. Adapter sleeves are used for easy assembly and disassembly of tapered bearings.

Steel Ball

The ball is a spherical rolling element used in ball- bearings. The friction forces of steel balls are lower than other bearings. Thus, they are used in ball- bearings that must rotate at very high speeds.

Retaining Ring

The retaining ring is a flexible and round machine element. The retaining ring is placed between the piston and the cylinder. It prevents leakage in a mechanical system. Retaining rings also scrape the lubricants on the cylinders and prevent the burning of the oil.

Internal Circlip

An internal circlip is a special type of flexible ring. It is used to secure pinned connections in motors, turbines and pistons. An internal circlip is fitted inside a cylindrical bore.

External Circlip

External circlips provide an interference fit onto a machined groove on the shaft. They are used to replace nuts, threaded sleeves, cotter pins, set collars, machined shoulders. They are fitted axially over the outside of a shaft.


Nuts are simple machine elements. They connect the machine elements to each other. Bolts and nuts are used together.

Hex Nuts

Hex nuts are six‑sided nuts. They are the most common nuts used today.  Hex nuts are used to connect both metal and wood components to prevent tension and movement. They are used with anchor shackles, bolts, screws, and other externally threaded components.

Butterfly Nut

A butterfly nut has wing-like projections. They can hold two or more objects together with a bolt. Butterfly nuts provide leverage in turning with thumb and forefinger.

Ring Nut

The ring nut allows ropes, chains, trellises, and hanging baskets to be secured. It nut can be used in both solid and hollow concrete building materials.


A washer is a typically disk-shaped, thin, metal or plastic plate with a hole. It is used to distribute the load of a bolt or nut. Washers prevent galvanic corrosion and leakage

Flat Washer

The flat washer is a circular, flat machine element with a central hole for a bolt. They distribute the fastener's load and reduce heat and friction during the tightening process.


A bolt is a threaded fastener with an external male thread. It is used to fasten two machine elements to keep their position. Bolts pass through an unthreaded hole in a component. A bolt is attached to a washer and nut.

Hexagon-Head Bolt

Hexagon-head bolts are also known as hex bolts. They are named for their six-sided shape. Hex bolts They are used in tight spaces to secure wood, metal, plastic and other materials. They are used in all industries and homes.

Countersunk Screws

Countersunk screws are a type of precision screw. They have a countersunk head. They can sit flush against a target housing.  Countersunk screws are used when a smooth surface is required.

Wing Bolt

A wing bolt has a head like a wing nut. Wing bolts create an exceptional fastening. They are designed to be easily operated by hand and they can be adjusted from various positions.

Stud Bolt

A stud bolt is a headless bolt. It looks like a piece of threaded bar and it has teeth on both ends. A stud bolt is used to join multiple parts. Studs are used together with nuts.


A pulley is a rotating wheel on an axle or shaft. A pully is used with a belt. Pulleys transfer movement and power from one rotating pulley to another. Different sized pullies can be used to change rotational speed.


A belt is a flexible machine element. A belt transfers power and rotational motion from one shaft to another. It is used to connect pulleys in parallel.


A gear is a rotating cylindrical machine element with teeth. It is also called a cogwheel. A gear work with other gears. They can change the speed, torque, and direction of a mechanism.

Spur Gear

Spur gears are a type of cylindrical gear. The teeth of a spur gear are parallel to the shaft axis. In a mechanical setup, spur gears are used to transfer motion and power from one shaft to another. They alter the operating speed, multiply torque, and allow for the fine-tuned control of positioning systems.

Helical Gear

Helical gears are a type of cylindrical gear. The teeth of a helical gear are angled to the shaft. When compared to other gears helical gears are able to carry more load. They can also operate smoother and quieter.

Bevel Gears

Bevel gears are conically shaped gears. These gears are used to transmit power between shafts that intersect at a 90-degree angle.  They are used on the axes where the two shafts intersect.

Rack and Pinion

A rack and pinion is a type of linear actuator.  For the actuator to work, a circular gear (the pinion) engages with a linear gear; then this translates rotational motion into linear motion.

Worm Gears

A worm gear is a shaft with a spiral thread. Worm gear mechanisms transmit motion and power between two shafts.  They change the rotational movement by 90 degrees. A worm gear can increase torque or reduce speed.

Ring and Pinion Gear Sets

Ring and pinion gears are used to spin wheels and axles forwards and backwards. The ring and pinion gears are used in motor vehicles. They improve drive-train performance and provide extra power to the wheels.

Cam and Follower

A cam is a reciprocating, oscillating, or rotating body. The follower imparts reciprocating motion to a cam. Cam and followers convert rotary motion into linear motion.


Springs are elastic, energy-storing machine elements. They can be metal or plastic. Springs are elongated by tensile force. and they are compressed by pressing force. Springs return to their original shape when the load is removed.

Compression Spring

Compression springs are open-coil helical springs. They are used to release or store energy along the axis.  They can maintain or absorb shock between two surfaces.

Extension Spring

Extension springs absorb and store energy. An extension spring bring components that were pulled apart back together again. They are attached at both ends of the components.

Leaf Spring

The leaf spring is an arc-shaped, slender piece of steel.  They provide support to any weight added to a vehicle. Leaf springs are stacked with the same material in smaller sizes and bolted together. They are attached to the rear axle and the chassis.

Oil Seal

An oil seal is a machine element that prevents leakage in mechanical systems. It is used to protect shafts and bearings from ingress of dirt and foreign matter and the egress of oil. The oil seal consists of an outer circular metal part and an inner flexible member. Oil seals are bonded to the metal part by chemical adhesive agents.

O Ring

An o-ring is like a torus with a round cross-section.  It is also known as a gasket. It is a sealing element in mechanical systems. The o-ring is seated in a groove and compressed between two parts.


A gasket is a mechanical seal. Gaskets are made from a flat material such as paper, rubber, silicone, metal. They prevent leakage from or into joined objects.


The differential is a gear system that provides the right amount of power to wheels. Thus, the vehicle turns corners in a balanced way.


A piston is a disc-shaped part. It is used in engines, pumps and compressors. It. It converts chemical energy into mechanical energy in motor vehicles. The piston is placed in a cylinder.

Axle shaft

An axle shaft rotates the wheels and supports the weight of a vehicle. The axles serve to transmit driving torque to the wheel. they also maintain the position of the wheels relative to each other and to the vehicle body. Axle shafts are an integral component of practical wheeled vehicles.

Piston Rod

A piston rod connects the piston to the crankshaft. It makes the crankshaft rotate; because it transmits the movement from the piston to the crankshaft.


Shafts are cylindrical shaped machine elements. They carry rotating gears, wheels and pulleys. Shafts are used to transfer power between parts.


Pistons produce energy; a crankshaft transfers this energy to the engine shaft. It supports the engine shaft to rotate. A crankshaft is also called a crank arm.


The camshaft has egg like bulges. It ensures the balanced operation of the engine in vehicles


A bushing is an independent plain bearing. It is inserted into a hole. Bushings provide a bearing for rotating machine elements. They eliminate the clearance between mechanical parts.

Shaft Collar

Shaft collars are ring-shaped plastic or metal devices. They hold motor components, gear assemblies, sprockets, and bearings in place. They clamp around a shaft.

Shaft Spacer

A shaft spacer is like a shaft collar. It controls the relative position between two machine elements.  A shaft spacer ​is slid over the shaft against the machine element that is to be positioned.

Milling Arbor

A milling arbor is a tool holder for a milling machine. Milling arbors hold rotating milling cutters rigidly. They are mounted on the spindle. They transmit the rotary motion and torque of the spindle to the cutting tool.

Clamping Nut

Clamping nuts are used for fixing rotating parts and reversible shafts. The compact construction ensures a safe function. They allow quick installation using a face wrench.

Pull Stud

Pull studs are the link between the machine drawbar and the tool holder. They are used in the milling process.

Brake Disc

A brake disc is a type of brake. The brake disc is in the brake system of vehicles and provides controlled deceleration. Hydraulically actuated disc brakes are the most used form of brake for motor vehicles.


A flange is used in connecting pipes, valves, pumps and other equipment to form a piping system. They provide easy access for cleaning, inspection or modification. They are usually welded or screwed. Flanged joints are made by bolting together two flanges with a gasket between them to provide a seal.


The coupling connects two shafts together at their ends. A coupling receives power from the motor. It transmits the rotary motion to the shaft.


Centers support the workpiece between the headstock and the tailstock. They prevent flexing of long workpieces.


Collets are used for clamping cylindrical cutting tools. They are used to hold tools such as drills, milling cutters and taps. Collets are used with a collet holder.


Taps are tools used to create screw threads. The tapping process creates threads on the inside of a drilled hole. They are numbered 1, 2 and 3, and are used in that order.

Threading Die

Threading dies are tools used for cutting threads. They are used to form or cut an external thread on the outside of rods.


Most machines have gears and pulleys. Wedges enable the detachable assembly of these elements on the shafts in a way. They also provide the transmission of movement on the shaft.

Axial Joint

An axial joint is used to provide the connection of the steering gear with the wheel axle components. It receives the movement from the steering wheel and transmits the movement to the rod end. Thus, the wheels turn.

Universal Joint

A universal joint is a universal connector. It transmits rotation through slightly misaligned shafts. It connects an engine or transmission to the drive wheels used in some rear-wheel-drive cars. They are used in light and heavy-duty trucks, agricultural equipment, and construction vehicles.

Ball Joints

Ball joints are spherical bearings. They control the right-left turn of the car.

Oil Pan

An oil pan is an oil tank It houses the crankshaft in a reciprocating internal combustion engine. It also stores the oil in the system and allows it to cool.  It is located at the bottom of the engine or gearbox in machines and engines.

Lubricating Nipples

Good lubrication is necessary for a machine to run efficiently. Lubricating nipples are used to lubricate machine elements such as bearings and bushings.

The Oil Tap

The oil tap prevents oil leakage from the crankcase. It is also used to drain the oil in the crankcase.


Gauges are precision measuring instruments. They are used to quickly control the dimensions of the machined workpiece.

Plain Plug Gauges

Plug gauges are commonly used in the inspection of or gauging of hole sizes. They determine if the hole is within the upper/lower limits of the tolerance of the components. Each gauge has both go and no-go gauges on each side.

Snap Gauge

A snap gauge is a form of go/no go gauge. It is a limit gauge with permanently or temporarily fixed measurement aperture(s) and gaps. It can quickly verify the outside dimensions of a part.

Telescoping Gauges

Telescoping gauges are indirect measuring devices. This is a T-shaped tool. It consists of a handle, two telescopic rods and a locking screw. It is used to measure the internal diameter of a bore, hole, groove, slot.

Thread Plug Gauges

Thread plug gages have two ends: a go- no go. They  are used to check tolerances of threaded parts according to a certain specification. They have highly specific calibration tools. They are used to assure quality control and conformity to standards

Pivot Pin

A pivot is used to support rotating machine elements. A pivot pin is a cylindrical, short shaft. It is used to connect movable machine elements.


A cotter is a wedge-shaped or tapered piece. It is used to fasten parts of a structure. It secures fasteners nuts and pins. It also prevents the self-dissolving of fasteners.

Roll Pin

A roll pin is a cylindrical or conical, thin, long, machine element. Roll pins are used to fasten shafts. They are also used to centre parts.

Screw Pins

Screw Pins are headless bolts. They have a screw thread throughout their body.

Spring Dowel Pin

Spring dowel pins are slotted pins. They are made from high carbon spring steel material. They are mechanical fasteners. They secure the position of two or more parts of a machine relative to each other.

Taper Pin

A taper pin is a fastener used in a mechanical system. These two ended steel rods have one larger end.


A rivet is a permanent mechanical fastener. It consists of a smooth cylindrical shaft with a head on one end.


A hook is piece of curved or bent back metal, that helps to catch hold of or hang things. It is a machine element used to pull or hang something.

Chain Hoist

A chain hoist is used to lift loads. It has a special gear mechanism. It can lift lower heavy loads with a little force and keep the load in the desired position or can lift the load up to the desired distance.


A swivel is a machine element. It is a double ring used to prevent one ring from turning when the other rotates. It allows connected object, such as a chain or rope, swivel caster, or an anchor rode to rotate horizontally or vertically.


A puller is a standard hand tool used to remove parts such as bearings, pulleys or gears from a shaft. It has two or three legs that circle around the back or inside of a part. It also has a forcing screw which centres up against the end of a shaft.

Circlip Pliers

Circlip pliers are used for removing and installing the retaining rings.


Pliers are hand tools used to hold objects firmly. They can be used for bending and cutting wire.

Socket Adapter

A socket adapter is used to remove and install bolts and nuts. It can be used with a ratchet head that come in different sizes.

Universal Joint Socket

Universal joint sockets are used to tighten and loosen bolts or nuts.  Since they work with flexible angles they are useful in confined or narrow workspaces.

Allen Socket

Allen sockets are used to tighten bolts and screws with hexagonal heads. They are used in tight work areas that require strong tightening.

Torque Wrench

A torque wrench is used to tighten bolts and nuts with a certain force.

Allen key

An allen key is a hex key. They are a small handheld tool. An allen key is used for turning hexagonal bolt and screw sockets.

Open End Double Head Wrench

Open-end double-head wrench is an one-piece wrench with a U-shaped opening. They grips two opposite faces of the bolt or nut. They are used to tighten and loosen bolts and nuts. There are different-sized opening at each end.

Double Head Box Wrenches

Double Head Box Wrench is a hand tool.  They are used for loosening and tightening fasteners such as nuts and bolts. A box-end wrench fits around a bolt or nut. Head box allows more versatility and torque.

C spanners

C spanners are hand tools. They are used loosening retaining rings and adjusting chains. C spanners incorporate steel roll pins. They allow the jaws to adjust to fastener.

Spark Plug

A spark plug is a device for delivering electric current. The spark plug ignites the fuel and air mixture in the combustion chamber by sparking.

Spark Plug Wrench

Spark plug wrench is hand tool. They remove or tighten spark plugs into the cylinder head.

Adjustable spanner wrench

An adjustable spanner is an open-end wrench with a movable jaw. Adjustable spanner can be used with different sizes of fastener heads. 


A comparator is a control instrument. The comparator resembles a clock. Comparators check the parallelism of the surfaces. Comparators also check the axes of cylindrical workpieces.


Caliper is a measuring instrument having precise divisions on it. It is used to measure the dimensions of a machined part such as inner and outer diameters, length, and depth.


Micrometer is a precision mechanical measuring instrument. Micrometer is used to measure the lengths. Measurements can be made with a precision of one-thousandth of a millimeter (1/1000).


A file is a hand tool.  A file is used to remove fine amounts of material from a workpiece. They are used for smoothing or forming objects, especially of metal.


Vise is a holding device. Vise holds the workpiece during hand operations, such as filing, hammering, or sawing. They have two parallel jaws. One of the jaws is fixed. The other jaw is movable by a screw, a lever.

Oil can

Oil can holds oil (usually motor oil) Oil can is used to lubricate machinery.