KNSU3-25J18 is a module 3, 25-tooth plastic spur gear with a steel core, featuring a 45 mm bore diameter, 75 mm outside diameter, 30 mm face width, and 47 mm total length. It has a JIS grade N9 precision rating and operates with a 20° pressure angle. The gear combines MC602ST nylon with an S45C metal core using a knurled surface bonding process, providing dimensional stability across temperature variations and eliminating the need for mechanical fasteners. The allowable torque is 2.70 N·m (0.275 kgf·m) and backlash is 0~0.54 mm. The part is designed for applications requiring high thermal and mechanical performance without bolts or nuts.
Module 3, 25 Tooth Nylon Steel Core Spur Gear with Finished 18mm 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 | KNSU3-25J18 | KNSU3-25J18 |
| Product Name | Plastic Spur Gears (metric) | Module 3, 25 Tooth Nylon Steel Core Spur Gear with Finished 18mm Bore |
| Gear Type | Spur | Spur; Rack |
| Number of Teeth | 25 | 25 |
| Design | Metric | Metric |
| Pressure Angle | 20° | 20° |
| Material | Nylon | Nylon; Nylon / Steel Core |
