KSSG2.5-21J20 is a ground spur gear with a module of 2.5, 21 teeth, and a 6 mm × 2.8 mm keyway. It has a bore diameter of 20 mm, pitch diameter of 52.5 mm, outside diameter of 57.5 mm, face width of 25 mm, hub width of 18 mm, and total length of 43 mm. The gear is made of S45C steel with induction-hardened teeth at 50-60 HRC, a 20° pressure angle, and conforms to JIS grade N7 (JIS B1702-1:1998). A set screw is included for shaft fastening, though it is suitable only for light-load applications. Backlash is specified as 0.12-0.22 mm. The gear is not to be subjected to secondary operations on tooth areas due to hardness.
Module 2.5, 21 Tooth Ground Steel Spur Gear with 20mm Finished Bore
Inch Gears: AGMA 12, 10, 9, and 8
Available Pitches: 120 thru 16
Pressure Angles: 20° and 14.5°
Metric Gears: ISO 5 thru 9
Available Modules: 0.3 thru 3
Pressure Angles: 20° and 14.5°
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Elements of Metric Gear Technology
How to Achieve Optimum Performance in a Miniature Gear Train
You May Also Need:
Shafts
Bearings
Couplings
Our metal spur gears are available in a variety of materials, including:
With a variety of fastening styles, including:
| QTC METRIC GEARS | Stock Drive Products & Sterling Instrument - SDP/SI | |
|---|---|---|
| Product Category | Gears | Gears |
| Product Number | KSSG2.5-21J20 | KSSG2.5-21J20 |
| Product Name | Metal Spur Gears (metric) | Module 2.5, 21 Tooth Ground Steel Spur Gear with 20mm Finished Bore |
| Gear Type | Spur | Spur; Rack |
| Number of Teeth | 21 | 21 |
| Design | Metric | Metric |
| Pressure Angle | 20° | 20° |
| Material | Steel | Steel; Hardened; Hardened Carbon Steel |
