KCG3-20L2J20 is a left-hand lead bronze worm wheel with a 20:1 reduction ratio, 20 module, 2 starts, and a 20 mm bore, designed for use with steel worms in a Module 3 system. It has a pitch diameter of 60.57 mm, outside diameter of 69 mm, and face width of 28 mm. The unit has an allowable torque of 9.24 N·m at 1200 rpm and a backlash range of 0.15 to 0.33 mm, weighing 0.73 kg. The worm wheel features a normal plane pressure angle of 14° 30', a standard full-depth tooth profile, and a sand mold casting finish. The J-series variant includes a keyway of 6 mm width by 2.8 mm depth and an M5 set screw. Helix angle is 7° 50'.
Module 3, 20 Tooth, 2 Start, Left 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 | KCG3-20L2J20 | KCG3-20L2J20 |
| Product Name | Left Hand Lead Worm Gears (metric) | Module 3, 20 Tooth, 2 Start, Left Handed Cast Iron Worm Gear with 20mm Finished Bore |
| Number of Teeth | 20 | 20 |
| Design | Metric | |
| Pressure Angle | 20° | 14.5° |
| Mounting | Keyway; Set Screw | Keyway |
| PD | 60 mm (2.36 inch) | 60 mm (2.36 inch) |
