KSS2-21J12 is a module 2, 21-tooth steel spur gear with a 12 mm bore, featuring a keyway according to JIS B1301 (Js 9 tolerance) and a 4 x 1.8 mm set screw. It has a pressure angle of 20°, teeth of standard full depth, and is made of S45C steel with a tooth hardness of less than 194 HB. The gear meets JIS grade N8 precision (JIS B1702-1: 1998). The allowable torque is 49.4 N·m, with a theoretical backlash of 0.24 mm and a weight of 3.15 kg. Secondary operations that reduce tooth width are not recommended.
Module 2, 21 Tooth Mild Steel Spur Gear with 12mm 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°
For custom components or modifications
to a standard part, call us or submit an RFQ.
REQUEST A QUOTE
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 | KSS2-21J12 | KSS2-21J12 |
| Product Name | Metal Spur Gears (metric) | Module 2, 21 Tooth Mild Steel Spur Gear with 12mm Finished Bore |
| Gear Type | Spur | Spur; Rack |
| Number of Teeth | 21 | 21 |
| Design | Metric | Metric |
| Pressure Angle | 20° | 20° |
| Material | Steel | Steel; Carbon Steel |
