ID
976012
$ 470.10
1-2 weeks delivery time
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The Vetus COMFL1225 Combiflex 12 Flexible Coupling for 25 mm shafts combines the best features of the renowned Vetus UNIFLEX and BULLFLEX models. Designed for optimal damping of torsional vibrations and noise reduction, it ensures smooth and secure power transmission between the marine engine and propeller shaft. The 4" flange design provides universal gearbox compatibility, while the parallel clamping hub allows easy installation and removal without shaft tapering. Suitable for engines up to 107 hp, the COMFL1225 offers reliability, perfect alignment, and vibration-free operation even with minor shaft misalignments up to 2°.
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Vetus COMFL1225 Combiflex 12 Flexible Shaft Coupling – Ø 25 mm Shaft, 4" Flange
The Vetus COMFL1225 Combiflex 12 Flexible Coupling represents the next generation of marine shaft couplings, merging the proven performance of the UNIFLEX and BULLFLEX designs into one efficient, cost-effective solution. Engineered for optimal vibration damping and easy installation, the COMFL1225 ensures a smooth, quiet, and reliable connection between the propulsion engine and propeller shaft.
This flexible coupling minimizes torsional vibrations and cyclic irregularities at low revolutions, reducing drivetrain noise and extending component lifespan. The integrated rubber damping element eliminates backlash, providing a soft, vibration-free transmission while maintaining perfect alignment. Its unique self-centering mechanism keeps the shaft precisely aligned even at 2° of misalignment, ensuring smooth operation in both forward and reverse gear.
Key Features
- Combines the advantages of UNIFLEX and BULLFLEX couplings in one design
- Optimal torsional vibration damping for quieter and smoother operation
- Non-tapered clamping hub for fast installation and easy removal
- 4” standard flange fits most gearbox models directly
- Supports engines up to 107 hp (depending on gear reduction ratio)
- Permits shaft misalignment up to 2° without losing centering accuracy
- Secured against shearing off both axially and radially for maximum safety
- Built-in thrust damping element
- Reduces installation time by eliminating need for shaft tapering or keyway cutting
- Available adapter flanges for Volvo, Yanmar, and Kanzaki gearboxes
Technical Specifications
Parameter Value Product Code COMFL1225 Manufacturer Vetus Purpose Flexible shaft coupling for marine propulsion systems Shaft Diameter Ø 25 mm Flange Diameter 4” (standard gearbox pattern) Total Diameter 126 mm Height 137 mm Weight 3.5 kg DIN 6270B (Pleasure Craft) 2.4 kW / 100 shaft RPM (3.2 HP) DIN 6270A (Commercial Craft) 1.7 kW / 100 shaft RPM (2.2 HP) Gear Ratio 2:1 Max 121 HP Gear Ratio 2.5:1 Max 102 HP Permissible Shaft Misalignment Up to 2° Construction High-strength steel and vulcanized rubber composite Safety Design Axial and radial anti-shear locking mechanism Installation Parallel clamping hub (no tapering or keyway required) Compatible Gearboxes Hurth, Velvet, Technodrive, ZF, P.R.M. (direct fit) Adapter Options FLANGE1 (Yanmar/Kanzaki), FLANGE2/2A (Volvo)
Applications
- Marine engines up to 107 hp with 25 mm propeller shafts
- Direct fit for common marine gearboxes (ZF, Hurth, Technodrive, P.R.M.)
- Ideal for both pleasure and commercial craft requiring vibration-free transmission
- Integration with Volvo, Yanmar, and Kanzaki gearboxes using adapter flanges
The Vetus COMFL1225 Combiflex 12 Flexible Coupling delivers precision alignment, vibration damping, and easy installation in one compact, marine-proven assembly. Its advanced rubber damping element and self-centering hub ensure smooth, quiet propulsion performance, even under heavy loads and varying alignment conditions.
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