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    74 Products

    Sprockets

    Image of Product. Front orientation. Drive Sprockets. Sprockets, For Single Strand.

    For Single Strand

    Sprocket teeth mesh with your roller chain to smoothly transmit power. These U.S.-made sprockets have machined teeth for a more precise fit than flame-cut or punched teeth, allowing them to glide in and out of the chain to reduce wear and extend chain life.
    Steel—Steel is strong, but best for dry environments since moisture will cause it to rust.
    Finished Bore—Mount these sprockets onto your shaft and secure with a set screw—no machining required.
    For
    Roller Chain
    Keyway
    Trade
    No.
    Std.
    Pitch
    No. of
    Teeth
    OD
    Bore
    Type
    For Shaft
    Dia.
    Wd.
    Dp.
    Each
    For Single Strand
     
    Steel
    40ANSI1/2"508 1/4"Finished3/4"3/16"3/32"000000000000000
    40ANSI1/2"508 1/4"Finished7/8"3/16"3/32"00000000000000
    40ANSI1/2"508 1/4"Finished1"1/4"1/8"00000000000000
    40ANSI1/2"508 1/4"Finished1 1/4"1/4"1/8"00000000000000
    40ANSI1/2"508 1/4"Finished1 3/8"5/16"5/32"00000000000000
    40ANSI1/2"508 1/4"Finished1 1/2"3/8"3/16"00000000000000
     

    Metal Ratchet Gears and Pawls

    Image of System. Gears and Pawls (Sold Separately). Front orientation. Ratchet Gears and Pawls. Metal Ratchet Gears and Pawls.

    Gears and

    Pawls (Sold

    Separately)

    Gears
    Image of Attribute. Front orientation. Contains Annotated.
    Image of Attribute. Front orientation. Contains Annotated.
    Compared to nylon gears, these metal ratchet gears are better for high-load, high-speed, and heavy duty applications. Used to prevent unwanted motion in jacks, tie downs, clutches, and winches, ratchet gears have sloped teeth that allow motion in one direction and prevent it in the other.
    Hardened—Gears with hardened teeth are more wear resistant than gears with teeth that are not hardened.
    Hub,
    mm
    Face Wd.,
    mm
    No. of
    Teeth
    OD,
    mm
    For Shaft
    Dia., mm
    Mounting Distance,
    mm
    Material
    Tooth Heat
    Treatment
    Overall
    Wd., mm
    Dia.
    Wd.
    Each
    Round Bore
    65033.31033.81045 Carbon Steel
    		Hardened6——0000000000000
    65033.31033.81045 Carbon Steel
    		Hardened162510000000000000
    1250501245.51045 Carbon Steel
    		Hardened12——000000000000
    1250501245.51045 Carbon Steel
    		Hardened243512000000000000
    20501502095.51045 Carbon Steel
    		Hardened20——0000000000000
    255020020122.41045 Carbon Steel
    		Hardened431001800000000000000
     

    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.
    Nylon—Nylon gears are lightweight and stronger than acetal gears.
    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
    		50:15020°251265125MoldedWhite207Right Hand
    		00000000000000
    0.8
    		50:15020°40141.69188MoldedWhite259Right Hand
    		0000000000000
     
    Round Bore—Nylon
    1
    		50:15020°5015310208MoldedBlue3010Right Hand
    		0000000000000
     

    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.
    Image of Product. Front orientation. Spur Gears. Metal Spur Gears, 20° Pressure Angle, Clamping Bore with Clamping Screw.

    20° Pressure Angle

    Round Bore

    Gear with Round

    Bore and Set Screw

    20° Pressure

    Angle, Clamping

    Bore with

    Clamping 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.
    Stainless Steel—Stainless steel gears resist rust in damp and wet environments, so they're commonly used in food-processing plants and other areas with frequent cleaning.
    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.
    Clamping Bore—Gears with a clamping bore have a built-in clamp that securely grips shafts without marring them. Use the included clamping screw to tighten or loosen the grip.
    Hub
    Gear
    Pitch
    Gear
    Module
    No. of
    Teeth
    Gear Pitch
    Dia.
    OD
    Face
    Wd.
    Dia.
    Wd.
    Bore Type
    For Shaft
    Dia.
    Tooth Heat
    Treatment
    Material
    Each
    20° Pressure Angle
     
    Steel
    20
    		—502 1/2"2.6"1/2"1.62"0.5"Round Bore1/2"Not Hardened1117 Carbon Steel0000000000000
    —0.5
    		5025 mm26 mm5 mm22 mm7 mmRound Bore with Set Screw5 mmNot HardenedBlack-Oxide 1045 Carbon Steel0000000000000
    —0.8
    		5040 mm41.6 mm8 mm28 mm8 mmRound Bore with Set Screw6 mmNot HardenedBlack-Oxide 1045 Carbon Steel0000000000000
    —1
    		5050 mm52 mm10 mm35 mm10 mmRound Bore with Set Screw8 mmNot HardenedBlack-Oxide 1045 Carbon Steel0000000000000
    —1.5
    		5075 mm78 mm15 mm50 mm10 mmRound Bore12 mmNot HardenedBlack-Oxide 1045 Carbon Steel0000000000000
    —2
    		50100 mm104 mm20 mm55 mm10 mmRound Bore15 mmNot HardenedBlack-Oxide 1045 Carbon Steel0000000000000
     
    Stainless Steel
    —0.5
    		5025 mm26 mm5 mm17 mm10 mmClamping Bore with Clamping Screw6 mmNot Hardened303 Stainless Steel000000000000
    —1
    		5050 mm52 mm10 mm35 mm10 mmRound Bore10 mmNot Hardened303 Stainless Steel0000000000000
     
    Brass
    —0.5
    		5025 mm26 mm3 mm22 mm7 mmRound Bore with Set Screw4 mm—Brass0000000000000
    —0.8
    		5040 mm41.6 mm4 mm28 mm8 mmRound Bore with Set Screw6 mm—Brass0000000000000
    —1
    		5050 mm52 mm6 mm28 mm8 mmRound Bore with Set Screw8 mm—Brass0000000000000
     
    Gear Racks
    Image of Product. Front orientation. Spur Gear Racks. Metal Spur Gears, 20° Pressure Angle—Rectangular.
    Image of Product. Front orientation. Spur Gear Racks. Metal Spur Gears, 20° Pressure Angle—Round.

    20° Pressure Angle—Rectangular

    20° Pressure Angle—Round

    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.
    Stainless Steel—Stainless steel gear racks resist rust in damp and wet environments, so they're commonly used in food-processing plants and other areas with frequent cleaning.
    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.
    Hardened—Gear racks with hardened teeth have better wear resistance than racks with teeth that are not hardened.
    Gear
    Pitch
    Gear
    Module
    Lg.
    Pitch
    Ht.
    Ht.
    Face
    Wd.
    Dia.,
    mm
    Tooth Heat
    Treatment
    Material
    Features
    Each
    20° Pressure Angle—Rectangular
     
    Steel
    20
    		—2 ft.0.45"1/2"1/2"—Not Hardened1018 Low-Carbon Steel—000000000000
    20
    		—4 ft.0.45"1/2"1/2"—Not Hardened1215 Carbon Steel—000000000000
    20
    		—6 ft.0.45"1/2"1/2"—Not Hardened1215 Carbon Steel—000000000000
    —0.5
    		100 mm11.5 mm12 mm5 mm—Not HardenedBlack-Oxide 1045 Carbon Steel—0000000000000
    —0.5
    		300 mm11.5 mm12 mm5 mm—Not HardenedBlack-Oxide 1045 Carbon SteelMachined Ends0000000000000
    —0.8
    		100 mm11.5 mm12.3 mm8 mm—Not HardenedBlack-Oxide 1045 Carbon Steel—0000000000000
    —1
    		100 mm11 mm12 mm10 mm—Not HardenedBlack-Oxide 1045 Carbon Steel—0000000000000
    —1
    		300 mm11 mm12 mm10 mm—Not HardenedBlack-Oxide 1045 Carbon Steel—0000000000000
    —1
    		500 mm8.8 mm9.8 mm10 mm—Not Hardened1045 Carbon Steel—0000000000000
    —1
    		1,000 mm8.8 mm9.8 mm10 mm—Not Hardened1045 Carbon Steel—00000000000000
    —1.5
    		100 mm18.5 mm20 mm15 mm—Not HardenedBlack-Oxide 1045 Carbon Steel—0000000000000
    —1.5
    		300 mm18.5 mm20 mm15 mm—Not HardenedBlack-Oxide 1045 Carbon Steel—0000000000000
    —1.5
    		500 mm13.3 mm14.8 mm15 mm—Not Hardened1045 Carbon Steel—00000000000000
    —1.5
    		1,000 mm13.3 mm14.8 mm15 mm—Not Hardened1045 Carbon Steel—00000000000000
    —1.5
    		1,000 mm13.5 mm15 mm15 mm—Not HardenedBlack-Oxide 1045 Carbon SteelMachined Ends00000000000000
    —2
    		100 mm23 mm25 mm20 mm—Not HardenedBlack-Oxide 1045 Carbon Steel—0000000000000
    —2
    		300 mm23 mm25 mm20 mm—Not HardenedBlack-Oxide 1045 Carbon Steel—0000000000000
    —2
    		500 mm17.8 mm19.8 mm20 mm—Not Hardened1045 Carbon Steel—00000000000000
    —2
    		1,000 mm17.8 mm19.8 mm20 mm—Not Hardened1045 Carbon Steel—00000000000000
    —2
    		1,000 mm18 mm20 mm20 mm—Not HardenedBlack-Oxide 1045 Carbon SteelMachined Ends00000000000000
     
    Stainless Steel
    —1
    		500 mm11 mm12 mm10 mm—Hardened304 Stainless Steel—00000000000000
     
    Brass
    —0.5
    		300 mm8.5 mm9 mm3 mm——Brass—0000000000000
    —0.8
    		300 mm9.2 mm10 mm4 mm——Brass—0000000000000
    —1
    		300 mm9 mm10 mm6 mm——Brass—0000000000000
     
    20° Pressure Angle—Round
     
    Steel
    —1
    		500 mm9 mm——10Not HardenedBlack-Oxide 1045 Carbon Steel—00000000000000
    —1.5
    		500 mm13.5 mm——15Not HardenedBlack-Oxide 1045 Carbon Steel—00000000000000
    —2
    		1,000 mm18 mm——20Not HardenedBlack-Oxide 1045 Carbon Steel—00000000000000
     
    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 Steel0000000000000
    0.5
    		1005070495Not HardenedBlack-Oxide 1045 Carbon Steel000000000000
    1
    		6060905810Not HardenedBlack-Oxide 1045 Carbon Steel000000000000
    1
    		1001001309810Not HardenedBlack-Oxide 1045 Carbon Steel0000000000000
    1.5
    		10015019014715Not HardenedBlack-Oxide 1045 Carbon Steel0000000000000
    2
    		10020025019620Not HardenedBlack-Oxide 1045 Carbon Steel0000000000000
     

    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.
    Cast Iron—Cast iron gears are strong and durable.
    Speed Ratio—Speed ratio is the ratio by which output shaft speed is reduced. As speed decreases, torque increases.
    Hub
    Gear
    Module
    Gear
    Pitch
    Speed
    Ratio
    No. of
    Teeth
    Pressure
    Angle
    Gear Pitch
    Dia.
    For No. of
    Thread Starts
    OD
    Face
    Wd.
    Overall
    Wd.
    For Shaft
    Dia.
    Dia.
    Wd.
    Material
    For Thread
    Direction
    Tooth Heat
    Treatment
    Tooth Mechanical
    Finish
    Each
    Round Bore—Cast Iron
    —10
    		50:15014 1/2°5"15.22"5/8"1.375"3/4"2"0.75"Cast IronRight Hand
    		Not HardenedUnfinished0000000000000000
     
    Round Bore—Bronze
    —10
    		50:15014 1/2°5"15.24"5/8"1.375"3/4"1.94"0.75"BronzeRight Hand
    		Not HardenedUnfinished000000000000000
    0.5
    		—50:15020°25 mm126 mm5 mm12 mm5 mm20 mm7 mmBronzeRight Hand
    		Not HardenedUnfinished00000000000000
     

    Precision High-Torque GT Timing Belt Pulleys

    Image of Product. Front orientation. Timing Belt Drive Pulleys. Precision High-Torque GT Timing Belt Pulleys, Finished Bore.

    Finished Bore

    Image of Attribute. Front orientation. Contains Annotated, Border. Modified Curved (GT) Teeth.
    When precise synchronization is crucial, these pulleys minimize play (backlash). They’re often found in 3D printers, where accurate positioning is essential. Their curved teeth fit snugly with matching belts. Compared to pulleys with standard trapezoidal teeth, these pulleys transmit about three times more torque and run at higher speeds. All are compatible with Gates PowerGrip GT, 2GT, GT2, GT3, and GT4 series.
    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,
    mm
    No. of
    Teeth
    Bore
    Type
    For Shaft
    Dia.
    Pitch Dia.,
    mm
    No. of
    Flanges
    Hub
    Type
    Each
    For 2MGT Trade Size
     
    Corrosion-Resistant Aluminum
    6250Finished1/4"31.82Standard00000000000000
     
    For 3MGT Trade Size
     
    Corrosion-Resistant Aluminum
    9350Finished5/16"47.8—Standard0000000000000
     

    Timing Belt Pulleys

    Image of Product. Front orientation. Timing Belt Drive Pulleys. Timing Belt Pulleys, Finished Bore.

    Finished Bore

    Image of Attribute. Front orientation. Contains Annotated, Border. Timing Belt Pulleys.
    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.
    Pitch
    No. of
    Teeth
    Bore
    Type
    For Shaft
    Dia.
    Pitch
    Dia.
    Hub
    Type
    Each
    For XL Trade Size
     
    Corrosion-Resistant Aluminum
    3/8"0.200"50Finished3/8"3.183"Standard0000000000000
     

    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.
    Nylon—Nylon gears are wear resistant, but will swell and weaken over time when wet.
    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
    		5025263124Round Bore5White0000000000000
    1
    		5050526168Round Bore8White0000000000000
     
    Nylon
    1
    		505052103510Round Bore10Blue0000000000000
    1.5
    		507578154510Round Bore10Blue0000000000000
     
    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.
    Nylon—Nylon gear racks are wear resistant, but will swell and weaken over time when wet.
    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
    		2505.96.34MoldedGray000000000000
    1
    		3157.91010MoldedGray00000000000
    1
    		500111210MachinedWhite0000000000000
    1.5
    		50018.52015MachinedWhite0000000000000
     
    Nylon
    1
    		500111210MachinedBlue0000000000000
     
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