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    54 Products
    About Gears
    industrial info icon

    Compare gear types, measure pitch and module, calculate mounting distance, increase speed or torque, and more.

    Plastic Spur Gears

    Made of plastic, these spur gears run more quietly than metal gears and have good corrosion and chemical resistance. However, they’re not as strong as metal gears, so they’re best for light duty applications. Combine a gear and rack to convert rotary motion into linear motion.
    Combine gears with different numbers of teeth to change speed and torque in your assembly. For components to mesh correctly, they must have the same pressure angle and pitch/module.
    Gears
    Image of Product. Front orientation. Spur Gears. Plastic Spur Gears, 20° Pressure Angle.

    20° Pressure

    Angle

    20° Pressure Angle—The current industry standard, these 20° pressure angle spur gears have thicker, stronger teeth than 14½° pressure angle gears.
    Acetal—Acetal gears absorb less water than nylon gears, so they’re less likely to swell.
    Hub,
    mm
    Gear
    Module
    No. of
    Teeth
    Gear Pitch
    Dia., mm
    OD,
    mm
    Face Wd.,
    mm
    Dia.
    Wd.
    Bore Type
    For Shaft
    Dia., mm
    Color
    Each
    20° Pressure Angle
     
    Acetal
    0.5
    		201011384Round Bore
    		4White2662N31300000
    0.5
    		241213384Round Bore
    		4White2662N280000
    0.8
    		1612.814.4485Round Bore
    		4White2662N3240000
    1
    		121214686Round Bore
    		4White2662N3320000
    1
    		151517686Round Bore
    		4White2662N380000
     
    Gear Racks
    Image of Product. Front orientation. Spur Gear Racks. Plastic Spur Gears, 20° Pressure Angle—Rectangular.

    20° Pressure Angle—Rectangular

    These racks match with spur gears to convert rotary motion to linear motion. For components to mesh correctly, they must have the same pressure angle and pitch/module.
    Acetal—Acetal gear racks absorb less water than nylon racks, so they’re less likely to swell.
    Machined—Machined gear racks may be slightly bowed but will straighten out when installed.
    Gear
    Module
    Lg.,
    mm
    Pitch Ht.,
    mm
    Ht.,
    mm
    Face Wd.,
    mm
    Fabrication
    Color
    Each
    20° Pressure Angle—Rectangular
     
    Acetal
    0.5
    		2505.96.34MoldedGray2662N5500000
    0.8
    		2506.47.35MoldedGray2662N560000
    1
    		3157.91010MoldedGray2662N570000
    1
    		500111210MachinedWhite2662N63000000
     

    Plastic Worm Gears

    These plastic gears are lighter and quieter than metal gears—pair them with metal worms for lubrication-free operation. Worm gears use screw threads to make large reductions to shaft speed while transmitting motion at a right angle. They transmit motion from worm to gear and cannot be reversed. For gears and worms to mesh correctly, they must have the same pressure angle, pitch/module, number of thread starts, and thread direction.
    Gears
    Image of Product. Front orientation. Worm Gears. Plastic Worm Gears.
    Image of Attribute. Front orientation. Contains Annotated. Worm Gears. Plastic Worm Gears.
    Image of Attribute. Front orientation. Contains Annotated. Worm Gears. Plastic Worm Gears.
    Acetal—Acetal gears are lightweight, and resist corrosion and chemicals. They absorb less moisture than nylon gears, so they’re less prone to dimensional changes. They’re best suited for light duty applications, such as prototyping.
    Speed Ratio—Speed ratio is the ratio by which output shaft speed is reduced. As speed decreases, torque increases.
    Hub,
    mm
    Gear
    Module
    Speed
    Ratio
    No. of
    Teeth
    Pressure
    Angle
    Gear Pitch
    Dia., mm
    For No. of
    Thread Starts
    OD,
    mm
    Face Wd.,
    mm
    Overall
    Wd., mm
    For Shaft
    Dia., mm
    Fabrication
    Color
    Dia.
    Wd.
    For Thread
    Direction
    Each
    Round Bore—Acetal
    0.5
    		10:12020°102115124MoldedWhite97Right Hand
    		4037N112000000
    0.5
    		20:12020°101115124MoldedWhite97Right Hand
    		4037N11100000
    0.5
    		30:13020°151165124MoldedWhite127Right Hand
    		4037N11300000
     

    Metal Spur Gears

    Our strongest spur gears for transferring motion. They’re better than plastic gears for high-load, high-speed, and heavy duty applications. Combine a gear and rack to convert rotary motion into linear motion. To minimize your footprint, mount one or more standard gears inside of an internal gear.
    Combine gears with different numbers of teeth to change speed and torque in your assembly. For components to mesh correctly, they must have the same pressure angle and pitch/module.
    Gears
    Image of Product. Front orientation. Spur Gears. Metal Spur Gears, 20° Pressure Angle, Round Bore.
    Image of Product. Gear with Round Bore and Set Screw. Back orientation. Spur Gears. Metal Spur Gears, 20° Pressure Angle, Round Bore with Set Screw.

    20° Pressure Angle

    Round Bore

    Gear with Round

    Bore and Set Screw

    20° Pressure Angle—The current industry standard, these 20° pressure angle spur gears have thicker, stronger teeth than 14½° pressure angle gears.
    Steel—Steel gears have hard, strong, and wear-resistant teeth, although they will rust when exposed to moisture and corrosive chemicals.
    Brass—Brass gears are easy to machine, so you can add your own mounting holes and make other alterations. They won't rust when exposed to water.
    Hub,
    mm
    Gear
    Module
    No. of
    Teeth
    Gear Pitch
    Dia., mm
    OD,
    mm
    Face Wd.,
    mm
    Dia.
    Wd.
    Bore Type
    For Shaft
    Dia., mm
    Tooth Heat
    Treatment
    Material
    Each
    20° Pressure Angle
     
    Steel
    0.5
    		1891051011Round Bore with Set Screw4Not HardenedBlack-Oxide 1045 Carbon Steel2664N312000000
    0.5
    		20101151111Round Bore with Set Screw4Not HardenedBlack-Oxide 1045 Carbon Steel2664N31400000
    0.5
    		3015165137Round Bore with Set Screw4Not HardenedBlack-Oxide 1045 Carbon Steel2664N31800000
     
    Brass
    0.5
    		20101138.57Round Bore
    		4—Brass2664N41100000
    0.5
    		2412133107Round Bore with Set Screw4—Brass2664N41700000
    0.5
    		2512.513.53117Round Bore
    		4—Brass2664N41800000
    0.5
    		3015163127Round Bore with Set Screw4—Brass2664N42500000
    0.5
    		3015163137Round Bore
    		4—Brass2664N42300000
    0.5
    		3618193167Round Bore with Set Screw4—Brass2664N43100000
    0.5
    		4020213187Round Bore with Set Screw4—Brass2664N43400000
    0.5
    		5025263227Round Bore with Set Screw4—Brass2664N43500000
    0.8
    		1713.615.24108Round Bore with Set Screw4—Brass2664N43700000
    0.8
    		1814.4164108Round Bore with Set Screw4—Brass2664N43800000
    0.8
    		252021.64168Round Bore with Set Screw4—Brass2664N44700000
    0.8
    		302425.64208Round Bore with Set Screw4—Brass2664N45400000
     
    Gear Racks
    Image of Product. Front orientation. Spur Gear Racks. Metal Spur Gears, 20° Pressure Angle—Rectangular.

    20° Pressure Angle—Rectangular

    These racks match with spur gears to convert rotary motion to linear motion. For components to mesh correctly, they must have the same pressure angle and pitch/module.
    Steel—Steel gear racks have strong and wear-resistant teeth, although they will rust when exposed to moisture and corrosive chemicals.
    Brass—Brass gear racks are easy to machine, so you can add your own mounting holes and make other alterations. They won't rust when exposed to water.
    Gear
    Module
    Lg.,
    mm
    Pitch Ht.,
    mm
    Ht.,
    mm
    Face Wd.,
    mm
    Tooth Heat
    Treatment
    Material
    Features
    Each
    20° Pressure Angle—Rectangular
     
    Steel
    0.5
    		10011.5125Not HardenedBlack-Oxide 1045 Carbon Steel—2485N242000000
    0.5
    		30011.5125Not HardenedBlack-Oxide 1045 Carbon SteelMachined Ends2485N24100000
     
    Brass
    0.5
    		3008.593—Brass—2485N23500000
    0.8
    		3009.2104—Brass—2485N23600000
     
    Internal Gears
    Image of Product. Front orientation. Internal Spur Gears. Metal Spur Gears.
    Save space without losing power. Insert a standard spur gear inside one of these gears for a compact assembly that smoothly transmits motion. Combine gears with different numbers of teeth to change speed and torque in your assembly. For components to mesh correctly, they must have the same pressure angle and pitch/module.
    Steel—Steel gears have strong and wear-resistant teeth, although they will rust when exposed to moisture and corrosive chemicals.
    Gear
    Module
    No. of
    Teeth
    Gear Pitch
    Dia., mm
    OD,
    mm
    ID,
    mm
    Face Wd.,
    mm
    Tooth Heat
    Treatment
    Finished Material
    Each
    20° Pressure Angle
     
    Steel
    0.5
    		603050295Not HardenedBlack-Oxide 1045 Carbon Steel2696N16000000
    0.5
    		1005070495Not HardenedBlack-Oxide 1045 Carbon Steel2696N1500000
     

    Timing Belt Pulleys

    Image of Product. Front orientation. Timing Belt Drive Pulleys. Timing Belt Pulleys, Finished Bore.
    Image of Attribute. Front orientation. Contains Annotated, Border. Timing Belt Pulleys.

    Finished Bore

    Keep your drive system in sync. Trapezoidal teeth mesh with matching belts to synchronize motion. With the original tooth profile, these pulleys handle enough torque for most applications. If you need high torque or precise starts and stops, consider curved tooth profiles, such as GT and HTD pulleys.
    Corrosion-Resistant Aluminum—Won't rust in wet environments and one-third the weight of steel and iron. However, aluminum pulleys are not as strong as iron and steel.
    Finished Bore—Mount these pulleys onto the shaft and secure with a set screw—no machining required.
    For Max.
    Belt Wd., mm
    Pitch
    No. of
    Teeth
    Bore
    Type
    For Shaft
    Dia., mm
    Pitch Dia.,
    mm
    No. of
    Flanges
    Hub
    Type
    Each
    For MXL Trade Size
     
    Corrosion-Resistant Aluminum
    30.080"15Finished
    		49.71Standard1375K175000000
    30.080"16Finished
    		410.31Standard1375K17600000
    30.080"18Finished
    		411.62Standard1375K17700000
    30.080"20Finished
    		412.92Standard1375K17900000
    30.080"22Finished
    		414.22Standard1375K18400000
    60.080"15Finished
    		49.71Standard1375K10900000
    60.080"16Finished
    		410.31Standard1375K11200000
    60.080"18Finished
    		411.62Standard1375K11400000
    60.080"20Finished
    		412.92Standard1375K11800000
    60.080"22Finished
    		414.22Standard1375K12700000
    90.080"15Finished
    		49.71Standard1375K11100000
    90.080"16Finished
    		410.31Standard1375K11300000
     

    Quick-Grip Screw-Clamp Bushings

    Image of Product. Front orientation. Pulley and Sprocket Bushings. Quick-Grip Screw-Clamp Bushings.
    Also known as Trantorque bushings, these tighten with a twist of the collar nut—no screws needed. As you tighten the collar nut, the inner sleeve contracts onto the shaft and the outer sleeve expands to hold your sprocket, pulley, or gear.
    For Shaft
    Dia., mm
    OD,
    mm
    Overall
    Wd., mm
    Max. Torque,
    in·lbf
    Each
    Steel
    416191202298K52000000
     

    Metal Worms and Worm Gears

    Image of System. Worm and Gear Sold Separately. Front orientation. Worm Gears. Metal Worms and Worm Gears.

    Worm and

    Gear Sold

    Separately

    Worm gears use screw threads to make large reductions to shaft speed while transmitting motion at a right angle. They transmit motion from worm to gear and cannot be reversed. For gears and worms to mesh correctly, they must have the same pressure angle, pitch/module, number of thread starts, and thread direction. These worms are compatible with plastic worm gears.
    Gears
    Image of Product. Front orientation. Worm Gears. Metal Worms and Worm Gears, Gears.
    Image of Attribute. Front orientation. Contains Annotated. Worm Gears. Metal Worms and Worm Gears, Gears.
    Image of Attribute. Front orientation. Contains Annotated. Worm Gears. Metal Worms and Worm Gears, Gears.
    Bronze—Bronze gears have low friction and dissipate heat better than cast iron gears to provide a long service life for both the gear and the worm. They’re also more corrosion resistant than cast iron gears.
    Speed Ratio—Speed ratio is the ratio by which output shaft speed is reduced. As speed decreases, torque increases.
    Hub
    Gear
    Module
    Speed
    Ratio
    No. of
    Teeth
    Pressure
    Angle
    Gear Pitch
    Dia., mm
    For No. of
    Thread Starts
    OD,
    mm
    Face Wd.,
    mm
    Overall
    Wd., mm
    For Shaft
    Dia., mm
    Dia.,
    mm
    Wd.,
    mm
    Material
    For Thread
    Direction
    Tooth Heat
    Treatment
    Tooth Mechanical
    Finish
    Each
    Round Bore—Bronze
    0.5
    		10:12020°10211512497BronzeRight Hand
    		Not HardenedUnfinished57545K735000000
    0.5
    		15:13020°152165124127BronzeRight Hand
    		Not HardenedUnfinished57545K73700000
    0.5
    		20:12020°10111512497BronzeRight Hand
    		Not HardenedUnfinished57545K73400000
    0.5
    		30:13020°151165124127BronzeRight Hand
    		Not HardenedUnfinished57545K73600000
     

    Plastic Timing Belt Pulleys

    Image of Product. Front orientation. Timing Belt Drive Pulleys. Plastic Timing Belt Pulleys.
    Image of Attribute. Front orientation. Contains Annotated, Border. Trapezoidal Teeth.
    Naturally rust resistant and lightweight, these plastic pulleys are ideal for machines that require frequent washdowns. Trapezoidal teeth, the original tooth profile, mesh with matching belts to transmit power without slipping.
    Plain Bore—Do it your way—machine the bore to your exact shaft size or add a set screw or keyway.
    For Max.
    Belt Wd., mm
    Pitch
    No. of
    Teeth
    Bore
    Type
    For Shaft
    Dia., mm
    Pitch Dia.,
    mm
    No. of
    Flanges
    Hub
    Type
    Each
    For MXL Trade Size
     
    Polycarbonate
    60.080"14Plain
    		49.11Standard7717N1800000
    60.080"14Plain
    		49.12Standard7717N1700000
    60.080"15Plain
    		49.72Standard7717N1900000
    60.080"16Plain
    		410.32Standard7717N2200000
     
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