2pcs Straight Spur Gear 12mm Inner Aperture 21T 1 Module Hardened 45# Steel Spur Diff Differential Motor Gear RC Replacement Parts

About This Product :

• Size – Teeth: Teeth: 21T, Tooth Pitch: 3.14mm / 0.12inch, Tooth Depth: 2.25mm / 0.09inch, Outer Diameter: 23mm / 0.91inch, Aperture: 6mm / 0.24inch, Effective Tooth Length: 10mm / 0.39inch, Total Thickness: 10mm / 0.39inch, Module: 1 Mod, Pressure Angle: 20°
• Material – 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.
• Feature – Good machining made less rough and noise than other gears, making them roll smoothly.
• Application – Good straight spur gear replacement for your device.
• Note – The pinion gear aperture is 12mm and the module is 1, please check the size before purchasing. You will receive 2 x straight spur gear.