Product Description
The KHK SMS3-30R is a Carbon Steel Spiral Miter Gear from Kohara Gear Industry Co., Ltd., featuring Module 3, 30 teeth, and a right-hand spiral direction. Manufactured to JIS B 1704:1978 Grade 4 precision, these gears utilize Gleason tooth form geometry with a 35° helix angle and 20° pressure angle. The teeth are induction hardened to HRC 50–60 and finished with a black oxide coating, providing excellent wear resistance for power transmission applications requiring a 1:1 gear ratio at a 90° shaft angle. Shafts mount horizontally and this gear pairs with the SMS3-30L (left-hand) for a matched miter set.
Technical Specifications
| Specification | Value |
|---|---|
| Brand | KHK |
| Model / Part Number | SMS3-30R |
| Manufacturer | Kohara Gear Industry Co., Ltd. |
| Gear Type | Spiral Miter Gear |
| Construction | Carbon Steel Spiral Miter Gear |
| Module | 3 |
| Number of Teeth | 30 |
| Direction of Spiral | Right Hand |
| Gear Ratio | 1.0 (1:1) |
| Nominal Ratio | 1:1 |
| Shaft Orientation | Horizontal |
| Shaft Angle | 90° |
| Shape | B3 |
| Bore Type | Plain |
| Bore Diameter (A) | 20.0 mm (0.787 in) |
| Hub Diameter (B) | 70.0 mm (2.756 in) |
| Pitch Diameter (C) | 90.00 mm (3.543 in) |
| Outer Diameter (D) | 93.61 mm (3.685 in) |
| Mounting Distance (E) | 75.0 mm (2.953 in) |
| Face Width (J) | 20.00 mm (0.787 in) |
| Hub Width (H) | 20.0 mm (0.787 in) |
| Holding Surface Diameter (K) | 53.43 mm (2.103 in) |
| Total Length (F) | 45.25 mm (1.782 in) |
| Length from Crown to Back | 31.80 mm (1.252 in) |
| Length of Bore (I) | 40.00 mm (1.575 in) |
| Gear Teeth Type | Gleason |
| Helix Angle | 35° |
| Pressure Angle | 20° |
| Material | S45C (AISI 1045) Carbon Steel |
| Heat Treatment | Teeth Induction Hardened |
| Tooth Hardness | HRC 50–60 |
| Surface Treatment | Black Oxide Coating |
| Precision Grade | JIS B 1704:1978 Grade 4 |
| Backlash | 0.08–0.18 mm |
| Bending Strength | 65.8 N·m (6.71 kgf·m) |
| Surface Durability | 62.3 N·m (6.35 kgf·m) |
| Keyway | None |
| Mating Gear | SMS3-30L (Left Hand) |
| Weight | 1.32 kg (2.91 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 70.0 mm
Material S45C (AISI 1045) Carbon Steel
Mount 75.0 mm
Diameter 70.0 mm
Manufacturer Khk
Empty Weight 1.32 kg
Part Number SMS3-30R
Overall Length 45.25 mm
Shelf G-7
Bore Diameter 20.0 mm
Model SMS3-30R
MPN SMS3-30R
Type Miter Gear
