Plastic spur gears with a steel core, available in module 2.5 and 3, feature S45C metal cores and MC602ST nylon teeth, with precision graded to JIS grade N9 (JIS B1702-1:1998) and JIS grade 5 (JIS B1702:1976). The gears have a standard full-depth tooth profile with a 20° pressure angle. The KNSU2.5 series includes a 68-tooth variant with a 70 mm bore, 204 mm pitch diameter, 210 mm outside diameter, 30 mm face width, and 165 mm total length, rated for an allowable torque of 90.6 N·m (9.23 kgf·m). The core is bonded via a diamond-knurled and grooved surface treatment, ensuring strong adhesion and dimensional stability across temperature ranges. Backlash is specified at 0 to 0.48 mm. Suspended load capacity and thermal compensation are defined by manufacturer charts. The design eliminates need for mechanical fastening, offering a clean, integral assembly with minimal dimensional drift under varying conditions.
Module 2.5, 68 Tooth Nylon Steel Core Spur Gear with Finished 22mm Bore
Our plastic spur gears are available in a variety of materials, including:
With a variety of fastening styles, including:
You May Also Need:
Shafts
Bearings
Couplings
For custom components or modifications to a standard part, call us or submit an RFQ.
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Design of Plastic Gears and General Considerations of Plastic Gearing
How to Achieve Optimum Performance in a Miniature Gear Train
| QTC METRIC GEARS | Stock Drive Products & Sterling Instrument - SDP/SI | |
|---|---|---|
| Product Category | Gears | Gears |
| Product Number | KNSU2.5-68J22 | KNSU2.5-68J22 |
| Product Name | Plastic Spur Gears (metric) | Module 2.5, 68 Tooth Nylon Steel Core Spur Gear with Finished 22mm Bore |
| Gear Type | Spur | Spur; Rack |
| Number of Teeth | 68 | 68 |
| Design | Metric | Metric |
| Pressure Angle | 20° | 20° |
| Material | Nylon | Nylon; Nylon / Steel Core |
