Unique-Bargains Rigid Shaft Coupling 2-6mm Bore 20x12mm Red 2 Pcs

Rigid shaft coupling for 2–6 mm bores

This rigid shaft coupling connects motor shafts from 2 mm up to 6 mm in diameter. Two red aluminium-alloy couplers and eight M4 screws arrive ready to install. The 20 mm length and 12 mm outside diameter suit model cars, boats, moulds and general mechanical drives. Each coupler transmits torque without a rotation gap.

Fits small motor shafts and frees alignment effort

The 2 mm to 6 mm bore range covers common hobby and light-industrial motor sizes. Eight M4 screws clamp each shaft securely, eliminating backlash. The rigid design handles up to 180 degrees of angular misalignment without elastic deformation, so builders spend less time shimming and more time assembling the drivetrain.

Replaces flexible or undersized couplers

Upgrade from flexible couplings that introduce wind-up or from single-bore units that limit shaft combinations. The jump is worth it when a project demands direct torque transfer, zero backlash and a compact 20 mm by 12 mm footprint. Buyers needing larger bores, keyed shafts or integrated bearings will need a different coupling style.