ID
975926
$ 3,172.86
1-2 weeks delivery time
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The Vetus BULFL3250 Bullflex 32 Flexible Coupling (shaft Ø 50 mm, type 32) ensures exceptional vibration damping, smooth torque transmission, and precise shaft alignment for heavy-duty marine applications. With a 260 mm diameter and 263 mm height, it supports up to 439 HP at 3000 RPM (2:1 gear reduction) and compensates for shaft misalignment up to 2°. Its pre-tensioned flexible rubber element minimizes torsional and axial vibrations, ensuring quiet, backlash-free operation. Designed for durability and ease of installation, the coupling includes galvanic isolation between the engine and propeller shaft, a built-in thrust damper, and a non-tapered clamping hub, guaranteeing safe, long-lasting performance in demanding marine environments.
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Vetus BULFL3250 Bullflex 32 Flexible Coupling for 50 mm Shaft
The Vetus BULFL3250 Bullflex 32 Flexible Coupling provides superior vibration isolation, torque transmission, and precise propeller shaft alignment for marine propulsion systems using a 50 mm shaft. Built for high-performance vessels, it effectively absorbs torsional and axial vibrations caused by the engine, maintaining quiet and efficient operation even at high loads. The coupling’s flexibility allows for shaft misalignment up to 2°, while ensuring perfect centering and galvanic isolation between the engine and shaft for long-term corrosion protection.
Key Features
- High torsional flexibility for optimal vibration and noise damping
- Axially and radially secured against shearing under extreme conditions
- Allows shaft misalignment up to 2°
- Maintains excellent shaft centering and balance at all speeds
- Remains stable even in reverse operation
- Removable centering ring for installations with multiple bearings
- Integrated thrust damper minimizes axial vibration and engine load
- Non-tapered clamping hub for perfect centering and easy dismantling
- Provides galvanic isolation between engine and propeller shaft
- Maintenance-free, durable marine-grade construction
Performance Ratings (at 3000 RPM)
- Gear 2:1 reduction – Maximum 439 HP
- Gear 2.5:1 reduction – Maximum 370 HP
Installation Compatibility
Without adapter: Fits directly on Hurth, Velvet, Technodrive, ZF, and P.R.M. gearboxes using the UNISET4/5 stud and bolt set.
With adapter: For other gearbox types, adapter flanges are available (nuts and bolts included):
Adapter Flange Compatible Gearboxes FLANGE1 Yanmar KM2C, KMP2P, KM3P, Kanzaki KC30, KC45, KC100 FLANGE2 Volvo MS10A/L, MS15A/L, MS25A/L FLANGE2A Volvo MS, MSB, and all MS2 series FLANGE3 Yanmar KM4A, KM4A1, KMH4A, KBW20-1, KBW21, Kanzaki KC180
Technical Specifications
Parameter Specification Model BULFL3250 (Bullflex Type 32) Shaft Diameter Ø 50 mm Overall Diameter (D) 260 mm Height (L) 263 mm Pleasure Craft Power Ratio (DIN 6270B) 31.3 HP / 100 RPM (23.0 kW) Commercial Craft Power Ratio (DIN 6270A) 25.3 HP / 100 RPM (18.6 kW) Max Torque (Pleasure Craft) 2200 Nm Max Torque (Commercial Craft) 1780 Nm Max RPM (Zero Misalignment) 3600 RPM Max RPM (at 2° Misalignment) 1800 RPM Flange Options Combined 4″ and 5″ flanges Material High-quality marine-grade rubber with precision-machined steel hub Galvanic Isolation Yes
Dimensional Overview
- Type: Bullflex 32
- Flange size: 4″ & 5″ combined
- Shaft diameter: 50 mm
- Length L: 263 mm
- Diameter D: 260 mm
Advantages of the Bullflex Coupling
- Superior torsional and axial vibration absorption
- Quiet, backlash-free operation under all load conditions
- Excellent shaft alignment and rotational stability
- Corrosion-resistant and galvanically isolated design
- Easy to install, service, and dismantle
- Long operational life in demanding marine environments
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