KPG2.5-20R2J12 is a right-hand helical nylon worm gear with module 2.5, 20 teeth, 2 starts, and a 12 mm bore. It has a pitch diameter of 50.46 mm, outside diameter of 57.5 mm, face width of 22 mm, hub width of 14 mm, and total length of 36 mm. The gear is profile-shifted for proper center distance, with allowable torque of 0.87 kgf·m and backlash of 0~0.36 mm. The lead angle is 7°46'. The part is made of MC901 nylon and has a keyway of 5 mm width by 2.3 mm depth, with a set screw size of M4. The weight is 0.37 kg.
Module 2.5, 20 Tooth, 2 Start, Right Handed Nylon Worm Gear with 12mm 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 | KPG2.5-20R2J12 | KPG2.5-20R2J12 |
| Product Name | Right Hand Lead Worm Gears (metric) | Module 2.5, 20 Tooth, 2 Start, Right Handed Nylon Worm Gear with 12mm Finished Bore |
| Number of Teeth | 20 | 20 |
| Design | Metric | |
| Pressure Angle | 20° | 20° |
| Mounting | Keyway; Set Screw | Keyway |
| PD | 50 mm (1.97 inch) | 50 mm (1.97 inch) |
