KCG2.5-20L2 is a left-hand lead bronze worm wheel with a 2.5 mm module, 20 teeth, and 2 starts, designed for use with a steel worm. It has a bore diameter of 12 mm, a hub diameter of 35 mm, a pitch diameter of 50.46 mm, a throat diameter of 55 mm, an outside diameter of 57.5 mm, and a face width of 22 mm. Helix angle is 7°46′. The gear is made of CAC502 material with no heat treatment, noted for a precision grade of KHK W 002 grade 4. Allowable torque at 100 rpm is 10.4 N·m, and weight is 0.40 kg. Backlash ranges from 0.13 to 0.31 mm.
Module 2.5, 20 Tooth, 2 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 | KCG2.5-20L2 | KCG2.5-20L2 |
| Product Name | Left Hand Lead Worm Gears (metric) | Module 2.5, 20 Tooth, 2 Start, Left Handed Cast Iron Worm Gear with Plain Bore |
| Number of Teeth | 20 | 20 |
| Design | Metric | |
| Pressure Angle | 20° | 20° |
| PD | 50 mm (1.97 inch) | 50 mm (1.97 inch) |
