KBG4-20R2 is a bronze worm wheel with a 20-tooth count, 2 starts, and a right-hand helix angle of 7°25', designed for use with a module 4 steel worm gear. It has a 20 mm bore, 60 mm pitch diameter, 80.67 mm throat diameter, 88 mm outside diameter, and 35 mm face width. The gear is profile shifted for proper center distance and has a tooth hardness of none specified. It weighs 1.91 kg and has a backlash of 0.17 to 0.37 mm. It is precision grade KHK W 002 grade 4 and uses a standard full-depth tooth form with a 14°30' normal pressure angle, made from CAC502 material.
Module 4, 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 | KBG4-20R2 | KBG4-20R2 |
| Product Name | Right Hand Lead Worm Gears (metric) | Module 4, 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 | 80 mm (3.15 inch) | 80 mm (3.15 inch) |
