Sinoblu 8mm to 10mm Rigid Clamp-On Couplings, Aluminum Shaft Coupling 32 Diameter 45 Length, Motor Shaft Coupler Connector for CNC Machine 3D Printer DIY Encoder D32 L45 Size:8mm to 10mm Protection: IP65

Protection: IP65

and each stepper motor only needs 2 IO ports

He proudly gave them the name

5 x 2D --------------- 20pcs M4 x 0

With power of 60w light bulb

Sinoblu 8mm to 10mm Rigid Clamp-On Couplings, Aluminum Shaft Coupling 32 Diameter 45 Length, Motor Shaft Coupler Connector for CNC Machine 3D Printer DIY Encoder D32 L45 Size:8mm to 10mm Protection: IP65Sinoblu 8mm to 10mm Rigid Clamp On Couplings, Aluminum Shaft Coupling 32 Diameter 45 Length, Motor Shaft Coupler Connector for CNC Machine 3D Printer DIY Encoder Sinoblu Aluminum Rigid Set Screw Couplings Sinoblu aluminum rigid couplings are light in weight, have low inertia and are extremely sensitive. In practical applications, shaft couplers are easy to maintain and can resist oil and corrosion. And in a high speed environment, it can compensate