NEW KHK SS3-40

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.
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.