KCG3-20L1 is a left-hand lead bronze worm wheel with a 20:1 reduction ratio, 3 mm normal module, 20 teeth, 1 start, and a 3°55' helix angle. It has a 20 mm bore, 50 mm hub diameter, 60.14 mm pitch diameter, 66 mm throat diameter, 69 mm outside diameter, and 28 mm face width. The wheel is designed for use with a matching worm in a Module 3 gear system, with a normal pressure angle of 14°30'. The allowable torque at 30 rpm is 22.1 N·m, decreasing to 10.0 N·m at 1200 rpm, with a backlash of 0.15~0.33 mm and a weight of 0.73 kg.
Module 3, 20 Tooth, 1 Start, Left Handed Cast Iron 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 | KCG3-20L1 | KCG3-20L1 |
| Product Name | Left Hand Lead Worm Gears (metric) | Module 3, 20 Tooth, 1 Start, Left Handed Cast Iron 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) |
