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Connect motor shaft to anything else with a set-screw coupler. These couplers are made of machined aluminum and have a spiral cut that makes them slightly flexible so they can be fit to two shafts even if they are not perfectly co-linear and will help reduce bending effects.

The way they are cut, create a spring effect in the X Y & Z linear axis but not in the rotational axis. That means that you will not get increased backlash - so they're suitable for precision CNC work.

This coupler will connect 6mm diameter shaft to 6.35mm diameter shaft. Comes with two sets of double set-screws (two per side) for secure attachment. You'll need a 2mm allen wrench to tighten/loosen the set-screws.

6mm inner diameter / 6.50
mm inner diameter
Outer diameter: 19mm

Coupler

Flexible Coupler (6mm to 6.50mm)

Flexible Coupler (6mm to 7 mm)

Flexible Coupler (5mm to 6.5mm)

Flexible Coupler (4mm to 5 mm)

Flexible Coupler (4mm to 6.5 mm)

Flexible Coupler (5mm to 7 mm)

Flexible Coupler (3mm to 6.35mm)

Flexible Coupler (3mm to 5mm)

Flexible Coupler (4mm to 4 mm)

Flexible Coupler (3mm to 4mm)

Flexible Coupler (3mm to 6 mm)

Flexible Coupler (3mm to 3mm)