KSSA4-25 is a steel hubless spur gear with module 4, 25 teeth, and a standard full-depth profile with a 20° pressure angle. It is made of S45C steel, has a JIS grade N8 precision rating per JIS B1702-1:1998, and a tooth hardness of less than 194 HB. The gear has a bore diameter of 100 mm, outer diameter of 108 mm, and tooth width of 40 mm. Its allowable torque is 39.9 N·m (4.07 kgf·m), with a theoretical backlash range of 0.20~0.44 mm and a weight of 2.37 kg. Secondary operations that reduce tooth width are cautioned against, as they impair precision and strength.
Module 4, 25 Tooth Mild Steel Hubless Spur Gear with Plain 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 | KSSA4-25 | KSSA4-25 |
| Product Name | Metal Spur Gears (metric) | Module 4, 25 Tooth Mild Steel Hubless Spur Gear with Plain Bore |
| Gear Type | Spur | Spur; Rack |
| Number of Teeth | 25 | 25 |
| Design | Metric | Metric |
| Pressure Angle | 20° | 20° |
| Material | Steel | Steel; Carbon Steel |
