ID
975925
$ 3,172.86
1-2 weeks delivery time
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The Vetus BULFL3245 Bullflex 32 Flexible Coupling (shaft Ø 45 mm, type 32) delivers high-capacity vibration damping and precise propeller shaft alignment for large marine propulsion systems. Featuring a 260 mm diameter and 263 mm height, it supports up to 439 HP at 3000 RPM (2:1 gear reduction) and allows for shaft misalignment up to 2°. Its pre-tensioned flexible rubber element effectively absorbs torsional and axial vibrations, ensuring smooth, silent, and backlash-free torque transmission. The coupling offers galvanic isolation between the engine and propeller shaft and includes a thrust damper, non-tapered clamping hub, and removable centering ring, ensuring long-term reliability, safety, and ease of installation.
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Vetus BULFL3245 Bullflex 32 Flexible Coupling for 45 mm Shaft
The Vetus BULFL3245 Bullflex 32 Flexible Coupling is designed to provide maximum vibration isolation, smooth power transmission, and superior shaft alignment in marine propulsion systems using a 45 mm propeller shaft. With a highly flexible, pre-tensioned rubber element, it effectively absorbs torsional and axial vibrations generated by the engine, ensuring quiet, efficient, and backlash-free operation. The coupling accommodates up to 2° of shaft misalignment while maintaining excellent centering, and it includes galvanic isolation to prevent electrolysis and corrosion between the engine and propeller shaft.
Key Features
- Exceptional torsional flexibility for efficient vibration damping
- Axially and radially secured against shearing under high load
- Permissible shaft misalignment up to 2°
- Excellent shaft centering, ensuring stability at all speeds
- Maintains alignment even in reverse gear operation
- Removable centering ring for multi-bearing applications
- Built-in thrust damper reduces axial vibrations and noise
- Non-tapered clamping hub for precise centering and easy assembly/disassembly
- Provides galvanic isolation between engine and propeller shaft
- Maintenance-free, durable marine 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 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 BULFL3245 (Bullflex Type 32) Shaft Diameter Ø 45 mm Overall Diameter (D) 260 mm Height (L) 263 mm Pleasure Craft Power Ratio (DIN 6270B) 31.1 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-grade marine rubber with precision-machined steel hub Galvanic Isolation Yes
Dimensional Overview
- Type: Bullflex 32
- Flange size: 4″ & 5″ combined
- Shaft diameter: 45 mm
- Length L: 263 mm
- Diameter D: 260 mm
Advantages of the Bullflex Coupling
- Outstanding damping of torsional and axial vibrations
- Quiet and backlash-free torque transfer
- Precise shaft alignment and long-term drivetrain reliability
- Corrosion-resistant and galvanically isolated design
- Simple installation, minimal maintenance, and long service life
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