Product Description
The KHK SS3-40 is a Module 3 carbon steel spur gear from KHK's SS (J Series) stock gear line. It features 40 standard full-depth teeth, a 20° pressure angle, a plain bore design, and a black oxide surface coating. Manufactured from S45C (AISI 1045) carbon steel to JIS grade N8 precision, this gear is a standard cataloged stock item suitable for a wide range of general power transmission applications. Shaft orientation is horizontal and the nominal gear ratio is 1:1 when paired with an identical gear.
Technical Specifications
| Specification | Value |
|---|---|
| Brand | KHK |
| Model / Part Number | SS3-40 |
| Gear Type | Spur Gear |
| Construction / Series | Carbon Steel Spur Gear – J Series |
| Module | 3 |
| Number of Teeth | 40 |
| Shape | S1 |
| Gear Teeth Type | Standard Full Depth |
| Pressure Angle | 20° |
| Nominal Ratio | 1:1 |
| Shaft Orientation | Horizontal |
| Precision Grade | JIS Grade N8 (JIS B1702-1:1998) |
| Material | S45C (AISI 1045) Carbon Steel |
| Tooth Hardness | Less than 194 HB (no heat treatment) |
| Surface Treatment | Black Oxide Coating |
| Bore Type | Plain (finished) |
| Bore Diameter (A) | 25 mm (0.984 in) |
| Hub Diameter (B) | 80 mm (3.150 in) |
| Pitch Diameter (C) | 120 mm (4.724 in) |
| Outer Diameter (D) | 126 mm (4.961 in) |
| Face Width (E) | 30 mm (1.181 in) |
| Hub Width (F) | 15 mm (0.591 in) |
| Total Length (G) | 45 mm (1.772 in) |
| Backlash | 0.14–0.32 mm (0.0055–0.0126 in) |
| Bending Strength | 398 N·m (40.6 kgf·m) |
| Surface Durability | 44 N·m (4.49 kgf·m) |
| Weight | 3.08 kg (6.790 lb) |
We warranty all items for 30 days from date of purchase.
Other Details
We warranty all items for 30 days from date of purchase. If you experience any issues with your item within this period, please contact us and we will work with you to resolve the problem. This warranty covers defects in functionality but does not cover damage caused by misuse, improper installation, or normal wear and tear.Product Videos
Custom Field
GTIN 679523686161
Hole Diameter 80 mm (3.150 in)
Material S45C (AISI 1045) Carbon Steel
Diameter 80 mm (3.150 in)
Manufacturer Khk
Empty Weight 3.08 kg (6.790 lb)
Part Number SS3-40
Overall Length 45 mm (1.772 in)
Series SS J Series
Shelf GS 38
Bore Diameter 25 mm (0.984 in)
Model SS3-40
MPN SS3-40
Type Spur Gear
