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Please note: Standard deliveries are currently taking up to 2 working days, however pallet deliveries to Scotland only are currently taking 2-3 working days at a minimum. We are working with our logistics partners to return to normal service.

Solid Bobbin Shaft Couplings


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Bobbin couplings can be used as shaft spacers to extend the boat prop shaft or, when used with two R&D flexible couplings they provide an extremely efficient and cost effective noise and vibration isolation unit.

Bobbins shaft spacer couplings are available to suit the three most common types of gearbox output coupling.

4" Bobbin Couplings

4" flange diameter, 3.25" hole pitch circle, Four 10mm holes, 2.5" register (one male, one female).

5" Bobbin Couplings

5" flange diameter, 4.25" hole pitch circle, Four 0.44" holes, 2.5" register (one male, one female).

6" Bobbin Couplings

5.75" flange diameter, 4.75" hole pitch circle, Six 0.50" holes, 3.0" register (one male, one female).

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