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Aluminum Flex Shaft Coupler - 5mm to 10mm

Aluminum Flex Shaft Coupler - 5mm to 10mm

Pimoroni

£3.17

Price read from Pimoroni on 2026-10-22. Check before buying.

Connect this to that 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 binding effects. The way they're cut, they're a little springy in the X Y Z linear axis but not in the rotational axis. That means that you won't get increased backlash - so they're suitable for precision CNC work. This coupler will connect a 5mm diameter shaft to a 10mm diameter shaft. Comes with two sets of double set-screws (two per side) for secure at

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The part other shops don't tell you. Three separate questions, kept separate on purpose, each with its source.