Plastic spur gears with a steel core, module 2.5, featuring a 40-tooth profile, 100 mm pitch diameter, 105 mm outside diameter, 25 mm face width, and a 65 mm hub diameter. The gear has a 18 mm bore, as implied by the J18 suffix, and mates with the KNSU2.5-40 series. Made of MC602ST nylon with an S45C steel core, it has a JIS grade N9 precision rating, 20° pressure angle, and an allowable torque of 27.8 N·m (2.83 kgf·m). Backlash is specified as 0~0.46 mm. The core is mechanically bonded via diamond knurling for high holding strength and dimensional stability across temperature ranges.
Module 2.5, 40 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 | KNSU2.5-40J18 | KNSU2.5-40J18 |
| Product Name | Plastic Spur Gears (metric) | Module 2.5, 40 Tooth Nylon Steel Core Spur Gear with Finished 18mm Bore |
| Gear Type | Spur | Spur; Rack |
| Number of Teeth | 40 | 40 |
| Design | Metric | Metric |
| Pressure Angle | 20° | 20° |
| Material | Nylon | Nylon; Nylon / Steel Core |
