ID
975213
$ 3,057.70
1-2 weeks delivery time
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The Vetus BULFL322 Bullflex 32 Flexible Coupling (shaft Ø 2", type 32) is engineered for heavy-duty marine engines up to 439 HP at 3000 RPM (2:1 reduction). With a 260 mm diameter and 263 mm height, it ensures exceptional damping of torsional vibrations and provides precise shaft alignment through its centering ring. The flexible rubber element guarantees silent, backlash-free operation and accommodates up to 2° misalignment. Featuring a built-in thrust damper, galvanic isolation, and a non-tapered clamping hub, this coupling delivers reliable, smooth performance with easy installation and low maintenance.
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Vetus BULFL322 Bullflex 32 Flexible Coupling for 2" Shaft
The Vetus BULFL322 Bullflex 32 Flexible Coupling is a high-performance marine coupling designed for powerful propulsion systems using 2″ shafts. It ensures optimum damping of vibrations and secure torque transmission between the engine and propeller shaft. The flexible, pre-tensioned rubber element effectively absorbs torsional and axial vibrations, providing smooth, noise-free, and backlash-free operation. Even with a shaft misalignment of up to 2°, the coupling maintains perfect centering and alignment, guaranteeing long-term reliability and minimal drivetrain stress.
Key Features
- Very high flexibility for superior vibration absorption
- Axially and radially secured against shearing for safe power transfer
- Permissible misalignment up to 2°
- Excellent centering for smooth high-RPM operation
- Removable centering ring for multi-bearing configurations
- Built-in thrust damper to reduce axial vibrations
- Non-tapered clamping hub for accurate centering and easy disassembly
- Provides galvanic isolation between engine and propeller shaft
- Ensures quiet and backlash-free torque transmission under load
Installation Compatibility
Without adapter: The Bullflex 32 mounts directly onto 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
Performance Ratings (at 3000 RPM)
- Gear 2:1 reduction – Maximum 439 HP
- Gear 2.5:1 reduction – Maximum 370 HP
Technical Specifications
Parameter Specification Model BULFL322 (Bullflex Type 32) Shaft Diameter Ø 2" (≈ 50.8 mm) Overall Diameter (D) 260 mm Height (L) 263 mm 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 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) Flange Options Combined 4″ and 5″ flanges Material Marine-grade rubber and precision-machined steel hub Galvanic Isolation Yes
Dimensional Overview
- Type: Bullflex 32
- Flange size: Combined 4″ and 5″
- Shaft diameter: 2″ (≈ 50.8 mm)
- Length L: 263 mm
- Diameter D: 260 mm
Advantages of the Bullflex Coupling
- Excellent damping of torsional and axial vibrations
- Silent, backlash-free torque transfer
- Precision alignment and long-term stability
- Durable and corrosion-resistant construction
- Simple installation and maintenance
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