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    13 Products

    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
    		10:12020°102115124MoldedWhite97Right Hand
    		4037N112000000
    0.5
    		20:12020°101115124MoldedWhite97Right Hand
    		4037N11100000
    0.5
    		30:13020°151165124MoldedWhite127Right Hand
    		4037N11300000
    0.5
    		40:14020°201215125MoldedWhite157Right Hand
    		4037N11500000
    0.5
    		50:15020°251265125MoldedWhite207Right Hand
    		4037N11600000
    0.5
    		60:16020°301315125MoldedWhite257Right Hand
    		4037N11700000
    0.8
    		10:12020°16217.69185MoldedWhite129Right Hand
    		4037N11900000
    0.8
    		50:15020°40141.69188MoldedWhite259Right Hand
    		4037N12400000
    0.8
    		60:16020°48149.69188MoldedWhite259Right Hand
    		4037N12500000
     
    Round Bore—Nylon
    1
    		10:12020°2022310206MoldedBlue1610Right Hand
    		4037N12900000
    1
    		30:13020°3013310206MoldedBlue2010Right Hand
    		4037N13100000
    1
    		50:15020°5015310208MoldedBlue3010Right Hand
    		4037N13300000
    1.5
    		10:12020°30234.512228MoldedBlue2210Right Hand
    		4037N12700000
     
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