KCG3-30R1J20 is a right-hand helical worm gear in the KCG Module 3 series, featuring a 30:1 reduction ratio, 30 teeth, 2 starts, a 20 mm bore, and a 55 mm hub diameter. It is made of gray iron (FC200) with a normal pressure angle of 14°30', a pitch diameter of 90.85 mm, and a face width of 28 mm. The gear has a backlash of 0.15~0.33 mm and weighs 1.50 kg. The J-series variant includes a keyway and set screw per JIS B1301 standards, with a 6 x 2.8 mm keyway and M5 set screw. Precision grade is KHK W 002 grade 4.
Module 3, 30 Tooth, 1 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 | KCG3-30R1J20 | KCG3-30R1J20 |
| Product Name | Right Hand Lead Worm Gears (metric) | Module 3, 30 Tooth, 1 Start, Right Handed Cast Iron Worm Gear with 20mm Finished Bore |
| Number of Teeth | 30 | 30 |
| Design | Metric | |
| Pressure Angle | 20° | 14.5° |
| Mounting | Keyway; Set Screw | Keyway |
| PD | 90 mm (3.54 inch) | 90 mm (3.54 inch) |
