5×8mm Aluminum Rigid Coupling (Anodized Blue) is a precision shaft connector used to rigidly join two shafts of different diameters (5mm to 8mm). Made from lightweight, durable aluminum with an anodized finish, it provides strong torque transmission with minimal backlash—ideal for CNC, 3D printers, robotics, and motor-to-leadscrew connections.

Key Features

• Bore Size: 5mm × 8mm (two different shaft diameters)

• Type: Rigid coupling (strong, low backlash connection)

• Material: Aluminum alloy

• Finish/Color: Anodized Blue

• High clamping strength for reliable torque transfer

• Anti-slip fastening using set screws / clamp screws (depends on model)

• Compact and lightweight design

Specifications

• Coupling Type: Rigid Shaft Coupler

• Inner Diameter (Side A): 5mm

• Inner Diameter (Side B): 8mm

• Material: Aluminum

• Surface Treatment: Anodized

• Color: Blue

• Use: Connects motor shaft to leadscrew/rod or joins two shafts

(Dimensions like length/outer diameter and screw count may vary by manufacturer.)

Applications

• 3D printers: motor shaft to Z-axis lead screw/rod

• CNC machines: spindle/axis shaft connections

• Robotics: shaft extension and rigid linkages

• Coupling motors to encoders, wheels, or gears

• DIY automation and mechanical projects

Used In

• Stepper motor systems (NEMA motors + lead screws)

• Linear motion assemblies

• Precision mechanical transmissions

Package Includes

• 1× 5×8mm Aluminum Rigid Coupling (Anodized Blue)