Coupling 3.17mm Hexagon Brass for Motor Shafts and Wheel

This is a high-quality copper coupling for connecting wheels and motors to facilitate the user to build a robot or small mobile platform motion system. The coupling is fully CNC machined with solid workmanship and high precision. The inner bore is 3.17 mm in diameter and is suitable for these motors:

• DC Motor 550 Black Shell 12V D-Axis
• DC Motor 550 12V

It can fit this wheel pretty well.

QUICK SPECS:

• Material: Brass
• Motor Shaft Diameter: 3.17mm
• Dimension: φ11 x mm/φ0.43 x 0.71 inches
• Weight: 14g±0.2g