An anti-backlash worm gear with 90 teeth, a 0.1873 inch bore, and a double-threaded 20° pressure angle helix, designed for 48-pitch worm shafts. It features a bronze gear body (QQ-B-637 Alloy 464), a 303 stainless steel hub, and 302 stainless steel springs. The gear is available in pin-type mounting with a set screw for shaft retention. The housing dimensions include a bore diameter tolerance of +.0005/-.0000 inches and a set screw size of #4-40. The part conforms to AGMA 10 standards for gear accuracy.
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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| Stock Drive Products & Sterling Instrument - SDP/SI | |
|---|---|
| Product Category | Gears |
| Product Number | S1B86A-P048B090D |
| Product Name | 90 Teeth, 20° Pressure Angle, 0.1875 Face width Anti-backlash worm gear |
| Gear Type | Rack |
| Number of Teeth | 90 |
| Design | English |
| Pressure Angle | 20° |
| Features | Anti-backlash |
