KPS3-28J40 is a module 3, 40-tooth plastic spur gear made of MC901 nylon with a hub, keyway measuring 12 mm width by 3.3 mm depth, and an M8 set screw. It has a pitch diameter of 120 mm, outside diameter of 126 mm, face width of 30 mm, hub width of 15 mm, and total length of 45 mm. The gear conforms to JIS grade N9 precision (equivalent to S1) with a 20° pressure angle and standard full-depth teeth. Allowable torque is 0.19 N·m (0.019 kgf·m). The keyway follows JIS B1301 standards. Backlash is theoretical and ranges up to 0.54 mm under normal conditions. Dimensional stability is affected by temperature and humidity, and operation without lubrication may generate heat; mating with steel gears is recommended.
Module 3, 28 Tooth Nylon Spur Gear with Hub and 40mm Finished 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 | KPS3-28J40 | KPS3-28J40 |
| Product Name | Plastic Spur Gears (metric) | Module 3, 28 Tooth Nylon Spur Gear with Hub and 40mm Finished Bore |
| Gear Type | Spur | Spur; Rack |
| Number of Teeth | 28 | 28 |
| Design | Metric | Metric |
| Pressure Angle | 20° | 20° |
| Material | Nylon | Nylon; Nylon / No Insert |
