ID
975918
$ 1,235.20
1-2 weeks delivery time
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The Vetus BULFL0840 Bullflex 8 Flexible Coupling (shaft Ø 40 mm, type 8) provides optimal damping of torsional and axial vibrations while ensuring precise propeller shaft alignment. With a 170 mm diameter and 166 mm height, this coupling delivers quiet, backlash-free power transmission up to 127 HP at 3600 RPM (2:1 reduction). The flexible pre-tensioned rubber element efficiently absorbs vibration, allowing up to 2° shaft misalignment. The coupling incorporates galvanic isolation, a built-in thrust damper, and a non-tapered hub for perfect centering and easy installation, ensuring long-lasting, low-maintenance operation in demanding marine environments.
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Vetus BULFL0840 Bullflex 8 Flexible Coupling for 40 mm Shaft
The Vetus BULFL0840 Bullflex 8 Flexible Coupling is designed for marine propulsion systems using 40 mm propeller shafts, providing outstanding vibration damping, precise alignment, and smooth torque transmission. Its highly flexible pre-tensioned rubber element absorbs torsional and axial vibrations, guaranteeing silent, backlash-free operation. The coupling tolerates up to 2° misalignment without affecting performance and ensures galvanic separation between the engine and shaft, protecting against corrosion and premature wear. With easy installation and robust construction, it offers reliability and performance under continuous load conditions.
Key Features
- High torsional flexibility for optimal vibration and noise reduction
- Axially and radially secured to prevent shearing under load
- Allows shaft misalignment up to 2° without performance loss
- Excellent centering precision, even at high shaft revolutions
- Shaft remains centered in both forward and reverse gear
- Removable centering ring for multi-bearing installations
- Integrated thrust damper reduces axial vibrations
- Non-tapered clamping hub for perfect centering and easy dismantling
- Provides galvanic isolation between the engine and propeller shaft
- Silent, backlash-free power transmission and extended service life
Performance Ratings (at 3600 RPM)
- Gear 2:1 reduction – Maximum 127 HP
- Gear 2.5:1 reduction – Maximum 102 HP
Technical Specifications
Parameter Specification Model BULFL0840 (Bullflex Type 8) Shaft Diameter Ø 40 mm Overall Diameter (D) 170 mm Height (L) 166 mm Pleasure Craft Power Ratio (DIN 6270B) 8.5 HP / 100 RPM (6.3 kW) Commercial Craft Power Ratio (DIN 6270A) 5.8 HP / 100 RPM (4.3 kW) Max Torque (Pleasure Craft) 600 Nm Max Torque (Commercial Craft) 410 Nm Max RPM (Zero Misalignment) 5000 RPM Max RPM (at 2° Misalignment) 2500 RPM Flange Options Combined 4″ and 5″ flanges Material Marine-grade rubber and precision-machined steel hub Galvanic Isolation Yes
Dimensional Overview
- Type: Bullflex 8
- Flange size: 4″ & 5″ combined
- Shaft diameter: 40 mm
- Length L: 166 mm
- Diameter D: 170 mm
Advantages of the Bullflex Coupling
- Superior torsional and axial vibration damping
- Maintenance-free and silent in operation
- Accurate alignment and reduced drivetrain wear
- Full galvanic protection between engine and shaft
- Durable, corrosion-resistant materials ensure longevity
- Simple installation and quick service accessibility
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