McMaster-Carr logo
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    37 Products

    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. Gear with Keyed Bore and Set Screw. Back orientation. Spur Gears. Metal Spur Gears, 14 1/2° Pressure Angle, Keyed Bore with Set Screw.

    Gear with Keyed

    Bore and Set Screw

    14 1/2° Pressure Angle—A former industry standard, 14½° pressure angle gears are often found in older machinery.
    Steel—Steel gears have hard, strong, and wear-resistant teeth, although they will rust when exposed to moisture and corrosive chemicals.
    Hub
    Keyway
    Gear
    Pitch
    No. of
    Teeth
    Gear Pitch
    Dia.
    OD
    Face
    Wd.
    Dia.
    Wd.
    Bore Type
    For Shaft
    Dia.
    Wd.
    Dp.
    Tooth Heat
    Treatment
    Material
    Each
    14 1/2° Pressure Angle
     
    Steel
    24
    		723"3.08"1/4"1.375"0.5"Keyed Bore with Set Screw1/2"0.125"0.063"Not Hardened1144 Carbon Steel00000000000000
    16
    		161"1.13"1/2"0.812"0.438"Keyed Bore with Set Screw1/2"0.125"0.063"Not Hardened1144 Carbon Steel000000000000
    16
    		181 1/8"1.25"1/2"0.938"0.438"Keyed Bore with Set Screw1/2"0.125"0.063"Not Hardened1144 Carbon Steel000000000000
    16
    		201 1/4"1.38"1/2"1.063"0.438"Keyed Bore with Set Screw1/2"0.125"0.063"Not Hardened1144 Carbon Steel000000000000
    16
    		221 3/8"1.5"1/2"1.188"0.438"Keyed Bore with Set Screw1/2"0.125"0.063"Not Hardened1144 Carbon Steel000000000000
    16
    		241 1/2"1.63"1/2"1.313"0.438"Keyed Bore with Set Screw1/2"0.125"0.063"Not Hardened1144 Carbon Steel000000000000
    16
    		281 3/4"1.88"1/2"1.5"0.5"Keyed Bore with Set Screw1/2"0.125"0.063"Not Hardened1144 Carbon Steel0000000000000
    16
    		301 7/8"2"1/2"1.625"0.5"Keyed Bore with Set Screw1/2"0.125"0.063"Not Hardened1144 Carbon Steel000000000000
    16
    		322"2.13"1/2"1.75"0.5"Keyed Bore with Set Screw1/2"0.125"0.063"Not Hardened1144 Carbon Steel0000000000000
    16
    		362 1/4"2.38"1/2"2"0.5"Keyed Bore with Set Screw1/2"0.125"0.063"Not Hardened1144 Carbon Steel0000000000000
    16
    		402 1/2"2.63"1/2"2"0.5"Keyed Bore with Set Screw1/2"0.125"0.063"Not Hardened1144 Carbon Steel0000000000000
    16
    		483"3.13"1/2"2"0.5"Keyed Bore with Set Screw1/2"0.125"0.063"Not Hardened1144 Carbon Steel0000000000000
    16
    		603 3/4"3.88"1/2"2"0.5"Keyed Bore with Set Screw1/2"0.125"0.063"Not Hardened1144 Carbon Steel0000000000000
    12
    		141.167"1.33"3/4"0.906"0.5"Keyed Bore with Set Screw1/2"0.125"0.063"Not Hardened1144 Carbon Steel000000000000
     
    Gear Racks
    Image of Product. Front orientation. Spur Gear Racks. Metal Spur Gears, 14 1/2° Pressure Angle—Rectangular.

    14 1/2° 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.
    Gear
    Pitch
    Lg.,
    ft.
    Pitch
    Ht.
    Ht.
    Face
    Wd.
    Tooth Heat
    Treatment
    Material
    No. of Mounting
    Holes
    Each
    14 1/2° Pressure Angle—Rectangular
     
    Steel
    24
    		20.208"1/4"1/4"Not Hardened1018 Low-Carbon Steel—0000000000000
    24
    		40.208"1/4"1/4"Not Hardened1018 Low-Carbon Steel12000000000000
    24
    		40.208"1/4"1/4"Not Hardened1215 Carbon Steel—0000000000000
    24
    		60.208"1/4"1/4"Not Hardened1215 Carbon Steel—0000000000000
    16
    		20.438"1/2"1/2"Not Hardened1018 Low-Carbon Steel—000000000000
    16
    		40.437"1/2"1/2"Not Hardened1018 Low-Carbon Steel12000000000000
    16
    		40.438"1/2"1/2"Not Hardened1215 Carbon Steel—0000000000000
    16
    		60.438"1/2"1/2"Not Hardened1215 Carbon Steel—0000000000000
    12
    		20.417"1/2"3/4"Not Hardened1018 Low-Carbon Steel—000000000000
    12
    		20.667"3/4"3/4"Not Hardened1018 Low-Carbon Steel—000000000000
    12
    		40.417"1/2"3/4"Not Hardened1018 Low-Carbon Steel—0000000000000
    12
    		40.667"3/4"3/4"Not Hardened1018 Low-Carbon Steel12000000000000
    12
    		40.667"3/4"3/4"Not Hardened1215 Carbon Steel—0000000000000
    12
    		60.417"1/2"3/4"Not Hardened1018 Low-Carbon Steel—0000000000000
    12
    		60.667"3/4"3/4"Not Hardened1215 Carbon Steel—00000000000000
     

    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.
    Worms
    Image of Product. Front orientation. Worm Gears. Metal Worms and Worm Gears, Worms, Keyed Bore.

    Keyed Bore

    Keyway
    Gear
    Pitch
    Pressure
    Angle
    Worm
    Lg.
    Gear Pitch
    Dia.
    OD
    For Shaft
    Dia.
    No. of Thread
    Starts
    Wd.
    Dp.
    Thread
    Direction
    Tooth Heat
    Treatment
    Tooth Mechanical
    Finish
    Each
    Keyed Bore—1144 Carbon Steel
    12
    		14 1/2°1 1/8"1"1.17"1/2"10.125"0.063"Right Hand
    		Not HardenedUnfinished000000000000000
     

    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, 14 1/2° Pressure Angle, Keyed Bore.

    14 1/2° Pressure

    Angle, Keyed Bore

    14 1/2° Pressure Angle—A former industry standard, 14½° pressure angle gears are often found in older machinery.
    Nylon—Nylon gears are wear resistant, but will swell and weaken over time when wet.
    Hub
    Keyway
    Gear
    Pitch
    No. of
    Teeth
    Gear Pitch
    Dia.
    OD
    Face
    Wd.
    Dia.
    Wd.
    Bore Type
    For Shaft
    Dia.
    Wd.
    Dp.
    Color
    Each
    14 1/2° Pressure Angle
     
    Nylon
    16
    		422 5/8"2.75"5/8"1.375"0.25"Keyed Bore13/32"0.125"0.063"White00000000000000
     
    Gear Racks
    Image of Product. Front orientation. Spur Gear Racks. Plastic Spur Gears, 14 1/2° Pressure Angle—Rectangular.

    14 1/2° 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.
    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
    Pitch
    Lg.,
    ft.
    Pitch
    Ht.
    Ht.
    Face
    Wd.
    Fabrication
    Color
    Each
    14 1/2° Pressure Angle—Rectangular
     
    Nylon
    16
    		10.25"5/16"5/16"MoldedWhite00000000000000
    16
    		40.438"1/2"1/2"MachinedGreen00000000000000
     

    Metal Miter Gears

    Image of System. Gears Sold Separately. Front orientation. Miter Gears. Metal Miter Gears.
    Image of Product. Front orientation. Miter Gears. Metal Miter Gears, Keyed Bore with Set Screw.

    Gears Sold

    Separately

    Keyed Bore

    with Set Screw

    Image of Attribute. For 90° Shaft Angle. Front orientation. Contains Annotated. Metal Miter Gears, For 90° Shaft Angle.
    Image of Attribute. Front orientation. Contains Annotated.

    For 90° Shaft Angle

    With straight, conically shaped teeth and a 1:1 speed ratio, miter gears connect two shafts at an angle without changing shaft speed or torque. They're more efficient than spiral miter gears because they create less friction.
    For two gears to mesh correctly, they must have the same pressure angle, shaft angle, pitch/module, and number of teeth.
    1144 Carbon Steel—Carbon steel gears have hard, strong, and wear-resistant teeth. They’re best for heavy duty and high-torque applications, such as lifting equipment. However, these gears will rust when exposed to moisture or corrosive chemicals. Some gears have hardened teeth for additional wear resistance; gears with teeth that are not hardened can be hardened to fit your application.
    Hub
    Keyway
    Gear
    Pitch
    No. of
    Teeth
    For Shaft
    Angle
    Pressure
    Angle
    Gear Pitch
    Dia.
    OD
    Face
    Wd.
    Overall
    Wd.
    For Shaft
    Dia.
    Mounting
    Distance
    Tooth Heat
    Treatment
    Dia.
    Wd.
    Wd.
    Dp.
    Set Screw
    Thread Size
    Each
    Keyed Bore with Set Screw
     
    1144 Carbon Steel
    16
    		2490°20°1 1/2"1.59"0.31"0.875"1/2"1.375"Hardened1"0.5"0.125"0.063"10-24
    		0000000000000
    12
    		1590°20°1 1/4"1.37"0.27"0.859"1/2"1.25"Hardened1"0.5"0.125"0.063"10-24
    		000000000000
    10
    		2090°20°2"2.14"0.44"1.359"1/2"2"Hardened1.625"0.813"0.125"0.063"10-24
    		0000000000000
     

    High-Power Metal Miter Gears

    Image of System. Front orientation. Miter Gears. High-Power Metal Miter Gears, Keyed Bore with Set Screw.

    Keyed Bore with Set

    Screw

    Image of Attribute. Front orientation. Contains Annotated. High-Power Metal Miter Gears.
    Image of Attribute. Front orientation. Contains Annotated.
    Also known as spiral miter gears, these gears have curved teeth that stay in contact longer than straight teeth so they handle heavier loads at higher speeds. They run quieter than standard miter gears because the teeth gradually engage. Use them to transmit motion at a right angle while maintaining shaft speed and torque. Gears are carbon steel for strength. Teeth are hardened for wear resistance.
    Gears must be identical in order to mesh correctly; they're sold as a pair.
    Hub
    Keyway
    Gear
    Pitch
    No. of
    Teeth
    Pressure
    Angle
    Gear Pitch
    Dia.
    OD
    Face
    Wd.
    Overall
    Wd.
    For Shaft
    Dia.
    Mounting
    Distance
    Material
    Dia.
    Wd.
    Wd.
    Dp.
    Set Screw
    Thread Size
    Pair
    Keyed Bore with Set Screw
    12
    		1520°1 1/4"1.36"0.3"0.86"1/2"1.25"1117 Carbon Steel
    		1"0.5"0.125"0.063"1/4"-20
    		0000000000000
     
    back to top