ID
977476
$ 643.20
1-2 weeks delivery time
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The Vetus UNIFL1320 Uniflex 13 Flexible Coupling is a robust and reliable marine shaft coupling for 20 mm shafts, designed to deliver excellent vibration damping and precise shaft alignment. Allowing a misalignment of up to 2°, it automatically centers the propeller shaft to the gearbox, ensuring quiet and smooth propulsion even with flexible engine mounts or self-aligning bearings. Suitable for engines up to 61 hp (2:1 gear reduction), the Uniflex 13 provides optimal torsional vibration isolation and easy installation without complex machining or alignment procedures.
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Vetus UNIFL1320 Uniflex 13 Flexible Shaft Coupling – Ø 20 mm Shaft, 4" Flange
The Vetus UNIFL1320 Uniflex 13 Flexible Coupling is engineered to provide vibration-free and accurately centered power transmission between the marine engine and the propeller shaft. It allows a shaft misalignment of up to 2° while maintaining perfect concentricity, automatically centering the shaft to the gearbox flange. This makes it an ideal choice for boats with flexible engine mounts or self-aligning bearings.
The Uniflex 13 coupling ensures quiet, reliable operation while reducing mechanical stress on driveline components. Its durable rubber element absorbs torsional vibrations and shocks, preventing fatigue and extending the life of both engine and shaft systems. The coupling is axially and radially secured against shearing off, ensuring maximum operational safety under all conditions.
Designed with a 4" flange and cylindrical clamping hub for a Ø 20 mm shaft, the UNIFL1320 offers quick installation without the need for special machining. It fits directly on Hurth, Velvet, Technodrive, ZF, and PRM gearboxes, and adapter flanges are available for Volvo, Yanmar, and Kanzaki units.
Key Features
- Allows up to 2° misalignment while maintaining precise centering
- Excellent torsional vibration and noise damping
- Self-centering design ensures perfect gearbox-to-shaft alignment
- 4” flange compatible with most marine gearbox types
- Axially and radially secured against shear loads
- Simple, fast installation – no special machining required
- Durable, marine-grade rubber element for long service life
- Ideal for engines on flexible supports or with self-aligning bearings
Technical Specifications
Parameter Value Product Code UNIFL1320 Manufacturer Vetus Purpose Flexible shaft coupling for marine propulsion systems Type Uniflex 13 Shaft Diameter Ø 20 mm Flange Diameter 4” (standard gearbox flange) Total Diameter 130 mm Height 98 mm Weight 2.4 kg DIN 6270B (Pleasure Craft) 2.6 kW / 100 shaft RPM (3.6 HP) DIN 6270A (Commercial Craft) 1.8 kW / 100 shaft RPM (2.5 HP) Maximum Power (2:1 Gear Reduction) Approx. 61 HP Maximum Power (2.5:1 Gear Reduction) Approx. 52 HP Permissible Shaft Misalignment Up to 2° Maximum Shaft RPM at 2° Angle 1500 RPM Construction Steel hub with bonded rubber damping element Shear Protection Axial and radial anti-shear secured Compatible Gearboxes (Direct Fit) Hurth, Velvet, Technodrive, ZF, PRM Adapter Flanges (Optional) FLANGE1 (Yanmar/Kanzaki), FLANGE2 & FLANGE2A (Volvo) Recommended Stud Kit UNISET4/5 for direct gearbox installation
Applications
- Marine propulsion systems with 20 mm propeller shafts
- Engines up to approximately 61 HP (2:1 gear ratio)
- Boats using self-aligning bearings or flexible engine mounts
- Direct installation on Hurth, Velvet, Technodrive, ZF, and PRM gearboxes
- Custom configurations with adapter flanges for Volvo, Yanmar, or Kanzaki gearboxes
The Vetus UNIFL1320 Uniflex 13 Flexible Coupling provides superior vibration damping, precise shaft alignment, and easy installation. Its ability to compensate for angular misalignment ensures smooth, quiet propulsion and extended drivetrain life, making it an ideal choice for high-performance and comfort-oriented marine systems.
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