Straight Spur Gear 10mm Inner Aperture 79T 1 Module 45# Steel Motor Gear Reduced Shank Drill Bits Inner Diameter x Outer Diameter:

Inner Diameter x Outer Diameter: 9 x 12 mm

5 Meters / 8 Feet

Model: WH138

Length: 350mm(13

Straight Spur Gear 10mm Inner Aperture 79T 1 Module 45# Steel Motor Gear Reduced Shank Drill Bits Inner Diameter x Outer Diameter:1. The pinion motor gear is made of 45# Steel, the tooth surface is treated by high frequency quenching, more stable, anti wear, strong and durable, and durable in use. 2. Specifications: Material: 45# Steel, Teeth: 79T, Tooth Pitch: 3. 14mm 0. 12inch, Tooth Depth: 2. 25mm 0. 09inch, Outer Diameter: 81mm 3. 19inch, Aperture: 10mm 0. 39inch, Effective Tooth Length: 10mm 0. 39inch, Total Thickness: 10mm 0. 39inch, Module: 1 Mod, Pressure Angle: 20 3.