3mm Aluminium Round Spacer

Unthreaded cylindrical aluminium sleeves with 3.1mm bore for M3 clearance fit and 5.5mm outer diameter. Used for precise component spacing in mechanical and electronic assemblies where lightweight construction is required.

Specification #

Dimension #

• All dimensions in mm, tolerance +/- 0.01 mm. Additional dimensions available on request.

Benefits #

3mm aluminium round spacers solve the problem of maintaining precise component separation in assemblies where weight matters. In 3D printers and CNC machines, incorrect spacing causes belt misalignment, stepper motor binding, and frame flex. These spacers eliminate guesswork by providing exact, repeatable standoff distances between structural elements. The smooth bore allows M3 bolts to pass through freely without thread engagement, enabling quick disassembly for maintenance. Aluminium’s natural oxide layer provides corrosion resistance without additional coatings, and its non-magnetic properties prevent interference with sensors and electronic components commonly found in robotics and drone platforms.

Common Applications #

Used across mechanical and electronic assemblies where lightweight, non-threaded spacing is needed.

• 3D printer stepper motor spacing
• CNC machine gantry spacing
• Robotics joint and linkage spacing
• PCB mounting with through-bolts
• V-slot linear rail spacing
• Belt pulley and coupler spacing
• Drone frame spacing
• Prototype and DIY mechanical projects