KDG0.8-20R2 is a right-hand lead plastic worm wheel with module 0.8, 20 teeth, and 2 starts. It is made of polyacetal, has a bore diameter of 5 mm, a hub diameter of 12 mm, a pitch diameter of 16.11 mm, an outside diameter of 17.6 mm, a face width of 9 mm, a hub width of 9 mm, and a total length of 18 mm. The allowable bending torque is 0.31 N·m (0.032 kgf·m), with a backlash range of 0.04 to 0.22 mm and a weight of 3.73 g. The gear is profile-shifted for proper center distance and features a bore finished with a minus tolerance for force fit. The helix angle is 6°34'.
Module 0.8, 20 Tooth, 2 Start, Right Handed Polyacetal Worm Gear
A worm gear pair, or worm gear set, consists of two gears: the worm, which resembles a spiral screw, and the worm gear (aka, worm wheel).
For the pair to mesh, the worm and worm gear must have the same pressure angles, modules, and lead directions (left- or right-hand).
A worm revolves on a shaft that’s perpendicular to the worm gear and the shaft angle is typically 90°. Because the teeth gradually mesh as the worm rotates, there is low noise and low vibration.
For more about worm gear mesh geometry follow this link.
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| QTC METRIC GEARS | Stock Drive Products & Sterling Instrument - SDP/SI | |
|---|---|---|
| Product Category | Gears | Gears |
| Product Number | KDG0.8-20R2 | KDG0.8-20R2 |
| Product Name | Right Hand Lead Worm Gears (metric) | Module 0.8, 20 Tooth, 2 Start, Right Handed Polyacetal Worm Gear |
| Number of Teeth | 20 | 20 |
| Design | Metric | |
| Pressure Angle | 20° | 20° |
| PD | 16 mm (0.6299 inch) | 16 mm (0.6299 inch) |
