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    42 Products

    Speed Reducers for Position- and Speed-Control Motors

    Pair these speed reducers with stepper and servo motors in position- and speed-control applications. Helical gears provide exact positioning and smoother travel than our other speed reducers. Attach to a motor to transmit motion parallel to the motor shaft while reducing speed and increasing torque.
    With 1 Output Shaft
    Image of Product. Front orientation. Gear Boxes. Speed Reducers for Position- and Speed-Control Motors.
    IP65 Enclosure Rating—They meet IP65 for protection from washdowns.
    Radial Load Capacity—Radial loads are loads that are perpendicular to the shaft. They’re commonly caused by components attached to shaft, such as pulleys and sprockets.
    Max.
    Output
    Max.
    Input
    Output
    Shaft
    Overall
    Torque
    Speed,
    rpm
    Speed,
    rpm
    Power,
    hp
    For Input
    Shaft Dia.
    Dia.
    Lg.
    Lg.
    Wd.
    Ht.
    Radial Load
    Cap., lb.
    Enclosure
    Rating
    Each
    For NEMA 23 Motor Frames
     
    3:1 Speed Ratio
    240 in·lbf @ 1,750 rpm2,0006,0002.891/4"0.38"1"4 1/2"2 1/2"2 1/2"348IP65
    		00000000000000000
     
    5:1 Speed Ratio
    345 in·lbf @ 1,750 rpm1,2006,0003.241/4"0.38"1"4 1/2"2 1/2"2 1/2"348IP65
    		0000000000000000
     
    10:1 Speed Ratio
    265 in·lbf @ 1,750 rpm6006,0001.451/4"0.38"1"4 1/2"2 1/2"2 1/2"348IP65
    		0000000000000000
     
    20:1 Speed Ratio
    345 in·lbf @ 1,750 rpm3006,0001.081/4"0.38"1"5 3/4"2 1/2"2 1/2"348IP65
    		0000000000000000
     
    50:1 Speed Ratio
    345 in·lbf @ 1,750 rpm1206,0000.461/4"0.38"1"5 3/4"2 1/2"2 1/2"348IP65
    		0000000000000000
     
    For NEMA 34 Motor Frames
     
    3:1 Speed Ratio
    743 in·lbf @ 1,750 rpm1,8335,5006.751/2"1/2"1.25"5 1/4"3 1/2"3 1/2"630IP65
    		0000000000000000
     
    5:1 Speed Ratio
    867 in·lbf @ 1,750 rpm1,1005,5005.731/2"1/2"1.25"5 1/4"3 1/2"3 1/2"630IP65
    		0000000000000000
     
    10:1 Speed Ratio
    797 in·lbf @ 1,750 rpm5505,5003.041/2"1/2"1.25"5 1/4"3 1/2"3 1/2"630IP65
    		0000000000000000
     
    20:1 Speed Ratio
    867 in·lbf @ 1,750 rpm2755,5001.971/2"1/2"1.25"7"3 1/2"3 1/2"630IP65
    		0000000000000000
     
    50:1 Speed Ratio
    867 in·lbf @ 1,750 rpm1105,5000.871/2"1/2"1.25"7"3 1/2"3 1/2"630IP65
    		0000000000000000
     

    High-Power Metal Helical Gears

    The helical teeth on these gears stay in contact longer than straight teeth, which allows them to transmit higher loads at higher speeds than spur gears.
    Crossed Gears
    Image of Product. Front orientation. Helical Gears. High-Power Metal Helical Gears, Crossed Gears.
    Crossed helical gears, also known as screw gears, can be configured to transmit motion at a 90° angle or in a straight line. To transmit motion at a 90° angle, pair two gears with the same tooth direction. To transmit motion in a straight line, make sure to get one left-hand and one right-hand gear.
    For gears to mesh correctly, they must have the same pressure angle and pitch/module. To change speed and torque in your assembly, pair two gears with different numbers of teeth.
    Hub
    Keyway
    Left-Hand Teeth
    Right-Hand Teeth
    Gear
    Pitch
    Gear
    Module
    No. of
    Teeth
    Helix
    Angle
    Gear Pitch
    Dia.
    OD
    Face
    Wd.
    Dia.
    Wd.
    Bore Type
    For Shaft
    Dia.
    Wd.
    Dp.
    Material
    Tooth Heat
    Treatment
    Each
    Each
    20° Pressure Angle
    —1
    		1345°18.4 mm20.38 mm10 mm15 mm10 mmRound Bore6 mm——Black-Oxide 1045 Carbon SteelNot Hardened0000000000000000000000000000
    —1
    		2645°36.8 mm38.77 mm10 mm30 mm10 mmRound Bore10 mm——Black-Oxide 1045 Carbon SteelNot Hardened00000000000000000000000000
    —1
    		3045°42.4 mm44.43 mm10 mm35 mm10 mmRound Bore10 mm——Black-Oxide 1045 Carbon SteelNot Hardened00000000000000000000000000
    —1.5
    		1045°21.2 mm24.21 mm15 mm16 mm10 mmRound Bore8 mm——Black-Oxide 1045 Carbon SteelNot Hardened00000000000000000000000000
    —1.5
    		1345°27.6 mm30.58 mm15 mm23 mm10 mmRound Bore10 mm——Black-Oxide 1045 Carbon SteelNot Hardened00000000000000000000000000
    —1.5
    		2645°55.2 mm58.15 mm15 mm40 mm10 mmRound Bore12 mm——Black-Oxide 1045 Carbon SteelNot Hardened00000000000000000000000000
     
    14 1/2° Pressure Angle
    16
    		—1645°1"1.09"1/2"0.86"0.5"Keyed Bore with Set Screw1/2"0.125"0.062"1137 Carbon SteelHardened000000000000000000000000
    16
    		—2445°1 1/2"1.59"1/2"1.37"0.5"Keyed Bore with Set Screw5/8"0.187"0.094"1137 Carbon SteelHardened00000000000000000000000000
    16
    		—3245°2"2.09"1/2"1.87"0.5"Keyed Bore with Set Screw5/8"0.187"0.094"1137 Carbon SteelHardened00000000000000000000000000
    16
    		—4845°3"3.09"1/2"2.5"0.5"Keyed Bore with Set Screw5/8"0.187"0.094"1137 Carbon SteelHardened00000000000000000000000000
    12
    		—1845°1 1/2"1.62"3/4"1.34"0.5"Keyed Bore with Set Screw5/8"0.187"0.094"1137 Carbon SteelHardened00000000000000000000000000
     
    Parallel Gears
    Image of Product. Front orientation. Helical Gears. High-Power Metal Helical Gears, Parallel Gears.
    Pair two parallel gears to transmit motion in a straight line or a gear with a rack to convert rotary motion to linear motion. Make sure mating components have different tooth directions.
    For gears to mesh correctly, they must have the same pressure angle and pitch/module. To change speed and torque in your assembly, pair two gears with different numbers of teeth.
    Hub,
    mm
    Left-Hand Teeth
    Right-Hand Teeth
    Gear
    Module
    No. of
    Teeth
    Helix
    Angle
    Gear Pitch
    Dia., mm
    OD,
    mm
    Face Wd.,
    mm
    Dia.
    Wd.
    Bore Type
    For Shaft
    Dia., mm
    Material
    Tooth Heat
    Treatment
    Each
    Each
    20° Pressure Angle
    1
    		2021 1/2°202281710Round Bore64140 Alloy SteelHardened0000000000000000000000000000
    1
    		3021 1/2°303282510Round Bore104140 Alloy SteelHardened0000000000000000000000000000
    1
    		4421 1/2°444683010Round Bore104140 Alloy SteelHardened0000000000000000000000000000
     
    Parallel Gear Racks
    Image of System. Parallel Gear on Gear Rack (Sold Separately). Front orientation. Helical Gear Racks.
    Image of Product. Front orientation. Helical Gear Racks.

    Parallel Gear on

    Gear Rack (Sold

    Separately)

    Pair these racks with parallel helical gears that have an opposite tooth direction to convert rotary motion to linear motion.
    Left-Hand Teeth
    Right-Hand Teeth
    Gear
    Module
    Lg.,
    mm
    Helix
    Angle
    Pitch Ht.,
    mm
    Ht.,
    mm
    Face Wd.,
    mm
    Material
    Tooth Heat
    Treatment
    Each
    Each
    20° Pressure Angle
    1
    		10021 1/2°141584140 Alloy SteelNot Hardened000000000000000000000000000000
    1
    		50021 1/2°141584140 Alloy SteelNot Hardened0000000000000000000000000000
     
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