KCG3-20R2J20 is a right-hand lead, 2-start bronze worm wheel for use with a module 3 steel worm, featuring a 20 mm bore, 50 mm hub diameter, 60.57 mm pitch diameter, 66 mm throat diameter, 69 mm outside diameter, and 28 mm face width. The product is precision graded to KHK W 002 grade 4, uses standard full-depth teeth with a 14°30' normal pressure angle, and is machined from CAC502 material. It has a center distance adjustment via profile shifting, a backlash range of 0.15 to 0.33 mm, and weighs 0.73 kg. The J-series suffix indicates an optional variant requiring 5 working days lead time, with keyway dimensions of 6 mm width by 2.8 mm depth per JIS B1301 Js9 tolerance, and a set screw size of M5.
Module 3, 20 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 | KCG3-20R2J20 | KCG3-20R2J20 |
| Product Name | Right Hand Lead Worm Gears (metric) | Module 3, 20 Tooth, 2 Start, Right 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) |
