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

    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/Plain Bore.

    20° Pressure Angle

    Round/Plain Bore

    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.
    Plain Bore—Gears with a plain bore have a large hub diameter so you can machine them to fit your shaft.
    Hardened—Gears with hardened teeth have better wear resistance than gears with teeth that are not hardened.
    Hub
    Gear
    Pitch
    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
    12
    		242"2.17"1"1.641"0.625"Round/Plain Bore3/4" to 15/16"Hardened1144 Carbon Steel5172T680000000
     
    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.
    Gear
    Pitch
    Lg.,
    ft.
    Pitch
    Ht.
    Ht.
    Face
    Wd.
    Tooth Heat
    Treatment
    Material
    Each
    20° Pressure Angle—Rectangular
     
    Steel
    12
    		20.917"1"1"Not Hardened1018 Low-Carbon Steel5174T3000000
    12
    		40.917"1"1"Not Hardened1215 Carbon Steel5174T1300000
    12
    		60.917"1"1"Not Hardened1215 Carbon Steel5174T23000000
     
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