Worm Gears
Worm gears are used where very large speed reductions are required. This is a shaft with a thread like a screw. This connects at 90° to a large gear (the thread shaft points along the outside edge of the larger gear). Each time the shaft spins one revolution, the gear turns forward by only one tooth. If the gear has 50 teeth, this creates a gear ratio of 50:1. The worm can drive the worm gear round, but the worm gear cannot drive the worm.
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RS PRO Bronze, Steel RH 32mm Long Worm Gear, 2 Start , 18mm Diam , 16mm Pitch Diam. , 20° Pressure Angle
IDR271,874.88 -
RS PRO Steel RH 30mm Long Worm Gear, 1 Start , 15.6mm Diam , 14mm Pitch Diam. , 20° Pressure Angle
IDR294,006.67 -
RS PRO Steel RH 32mm Long Worm Gear, 1 Start , 18mm Diam , 16mm Pitch Diam. , 20° Pressure Angle
IDR264,637.47