KCG3-30R2J20 is a right-hand lead bronze worm wheel with a 30:1 reduction ratio, 30 mm normal module, two thread starts, and a 7°50' helix angle, mounted on a 20 mm bore with a 55 mm hub diameter, 90.85 mm pitch diameter, 96 mm throat diameter, 99 mm outside diameter, and 28 mm face width. It is made of CAC502 bronze, has a standard full-depth tooth profile with a 14°30' normal pressure angle, and is precision grade KHK W 002 grade 4. The J20 variant includes a keyway (6 x 2.8 mm) and set screw (M5), with a weight of 1.50 kg and backlash of 0.15 to 0.33 mm. Allowable torque at 300 rpm is 29.3 N·m.
Module 3, 30 Tooth, 2 Start, Right Handed Cast Iron Worm Gear with 20mm Finished 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 | KCG3-30R2J20 | KCG3-30R2J20 |
| Product Name | Right Hand Lead Worm Gears (metric) | Module 3, 30 Tooth, 2 Start, Right Handed Cast Iron Worm Gear with 20mm Finished Bore |
| Number of Teeth | 30 | 30 |
| Design | Metric | |
| Pressure Angle | 20° | 14.5° |
| Mounting | Keyway; Set Screw | Keyway |
| PD | 90 mm (3.54 inch) | 90 mm (3.54 inch) |
