KSSG3-40J40 is a ground spur gear with module 3, 40 teeth, and a 40mm finished bore, manufactured from S45C steel with induction-hardened tooth surfaces achieving 50~60HRC hardness. It meets JIS grade N7 precision (JIS B1702-1:1998), has a 20° pressure angle, and standard full-depth teeth. The gear has an outside diameter of 132mm, face width of 30mm, and total length of 50mm. A keyway of size 12mm wide by 3.3mm deep conforming to JIS B1301 (Js9 tolerance) is included, with a tapped M8 hole and a set screw provided. Backlash is 0.14~0.24mm. No secondary operations are permitted on the induction-hardened tooth areas. The part includes a set screw and is not black oxide coated on reworked surfaces.
Module 3, 40 Tooth Ground Steel Spur Gear with 40mm Finished 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°
For custom components or modifications
to a standard part, call us or submit an RFQ.
REQUEST A QUOTE
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 | KSSG3-40J40 | KSSG3-40J40 |
| Product Name | Metal Spur Gears (metric) | Module 3, 40 Tooth Ground Steel Spur Gear with 40mm Finished Bore |
| Gear Type | Spur | Spur; Rack |
| Number of Teeth | 40 | 40 |
| Design | Metric | Metric |
| Pressure Angle | 20° | 20° |
| Material | Steel | Steel; Hardened; Hardened Carbon Steel |
