2" Bullflex Flexible Shaft Coupling - Type 32 (31.3 HP Max. HP/100 Shaft RPM)

Designed for smaller stern gear installations, the flexible rubber element of the Bullflex flexible coupling ensures low-noise vibration-free transmission, without backlash between the engine and the propeller shaft.

A special centering ring allows high shaft revolutions, and even in reverse gear, the shaft will remain perfectly centered.

• Optimum damping of vibrations
• Non-tapered clamping hub ensures easy installation and disassembly
• Misalignment of up to 2° permissible (misalignment restricts max. engine RPM, however)
• Secured against shearing off, axially and radially
• Eliminates propeller shaft backlash
• Special adapter flanges for Volvo, Yanmar and Kanzaki are available as options
• Note: Specification Table lists maximum horsepower for recreational use; for commercial use max. HP is 20% - 40% lower, please call if you have questions or need advice; 800-426-6930

FAQs

How does the Bullflex coupling reduce vibration?
The Bullflex uses a pre-tensioned, highly flexible rubber element that absorbs torsional vibrations and eliminates backlash for smoother, quieter operation.

Which Bullflex coupling size do I need for my boat?
Select the size based on your shaft diameter, engine horsepower, and reduction ratio. Refer to manufacturer tables for compatibility (e.g., Bullflex 4 for up to 61 HP at 2:1 reduction on a 30mm shaft).

Can Bullflex couplings be used with V-drives?
No, Bullflex couplings are not suitable for V-drive installations; only the Vetus KO5 coupling is recommended for V-drives.

Are Bullflex couplings compatible with all marine gearboxes?
They fit most standard gear types (Hurth, Velvet, ZF, Paragon, etc.), but always confirm bolt circle and flange compatibility for your specific gearbox.