Aluminum Alloy Flexible Shaft Coupling 5x5mm

Directly connecting a motor shaft to a lead screw or another shaft with a rigid coupler demands near-perfect alignment between the two - any slight offset transmits stress directly into both shafts and bearings, causing wear or binding over time. A flexible coupling solves this by allowing a small amount of give between its two halves, absorbing the minor misalignment that's genuinely unavoidable when a DIY-built frame positions a motor and a driven shaft.

Both bore sides matching at 5mm suits pairing common NEMA motor shaft sizes with equally-sized lead screws or other shafts, and aluminum alloy construction keeps the coupling lightweight while still handling the torque loads typical stepper-motor-driven mechanisms produce. Set screws on each side lock it firmly onto both shafts, preventing slippage under load.

Common uses are connecting a stepper motor to a lead screw on 3D printer Z-axis or CNC linear drives, coupling two shaft sections in a robotics mechanism, and any stepper-motor-driven linear or rotational system needing to tolerate minor shaft misalignment.