KSS3-21J15 is a steel spur gear from the KSS Series, with 21 teeth, a 15 mm finished bore, and a pressure angle of 20°. It is manufactured from S45C steel with a tooth hardness under 194 HB and complies with JIS Grade N8 precision (JIS B1702-1:1998). The gear has a cylindrical module of 3, a tooth width of 7.5 mm, and includes a keyway conforming to JIS B1301 (Js9 tolerance). The allowable torque is 1.11 N⋅m for the base variant, with a rated torque of 0.91 N⋅m after accounting for bore modification. Backlash is specified as 0.18⋅0.38 mm, and the gear includes a set screw for the tapped hole, which is counterbored. The product is available only on request, with a lead time of up to five working days and a maximum order quantity of 20 units per order.
Module 3, 21 Tooth Mild Steel Spur Gear with 15mm 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 | KSS3-21J15 | KSS3-21J15 |
| Product Name | Metal Spur Gears (metric) | Module 3, 21 Tooth Mild Steel Spur Gear with 15mm Finished Bore |
| Gear Type | Spur | Spur; Rack |
| Number of Teeth | 21 | 21 |
| Design | Metric | Metric |
| Pressure Angle | 20° | 20° |
| Material | Steel | Steel; Carbon Steel |
