KBG3-20R2 is a bronze worm wheel with a 20:1 reduction ratio, 20-module normal pitch, 2 starts, and a right-hand helix angle of 7°50'. It has a bore of 20 mm, hub diameter of 50 mm, pitch diameter of 60.57 mm, throat diameter of 66 mm, outside diameter of 69 mm, and face width of 28 mm. The gear is precision grade KHK W 002 grade 4, with a standard full-depth tooth profile and a normal pressure angle of 14°30'. Allowable torque at 100 rpm is 29.5 N·m, with backlash of 0.15 to 0.33 mm and a weight of 0.89 kg. The worm wheel is profile-shifted for proper center distance and is not heat treated.
Module 3, 20 Tooth, 2 Start, Right Handed Bronze Worm Gear with Plain Bore
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 | KBG3-20R2 | KBG3-20R2 |
| Product Name | Right Hand Lead Worm Gears (metric) | Module 3, 20 Tooth, 2 Start, Right Handed Bronze Worm Gear with Plain Bore |
| Number of Teeth | 20 | 20 |
| Design | Metric | |
| Pressure Angle | 20° | 14.5° |
| PD | 60 mm (2.36 inch) | 60 mm (2.36 inch) |
