ID
975204
$ 1,334.88
1-2 weeks delivery time
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The Vetus BULFL0814 Bullflex 8 Flexible Coupling (shaft Ø 1 ¼", type 8) provides outstanding vibration damping and secure power transmission between the engine and propeller shaft. With a compact 170 mm diameter and 166 mm height, it allows up to 2° misalignment while maintaining perfect shaft centering. Suitable for up to 127 HP at 3600 RPM (2:1 gear reduction), the coupling features a pre-tensioned rubber element, built-in thrust damper, and galvanic isolation for smooth, noise-free operation.
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Vetus BULFL0814 Bullflex 8 Flexible Coupling for 1 ¼" Shaft
The Vetus BULFL0814 Bullflex 8 Flexible Coupling is engineered for optimal damping of torsional vibrations and noise-free transmission between marine engines and propeller shafts. Its pre-tensioned rubber element ensures smooth operation without backlash, while the integrated centering ring and thrust damper guarantee precise alignment and minimal axial vibration. Designed for both pleasure and commercial craft, this coupling maintains shaft centering even at a 2° misalignment.
Key Features
- Very high flexibility for superior vibration absorption
- Axially and radially secured against shearing for safe transmission
- Permissible misalignment up to 2°
- Excellent centering of the shaft allowing high revolutions
- Shaft remains perfectly centered even in reverse gear
- Removable centering ring for multi-bearing installations
- Built-in thrust damper reducing axial vibrations
- Non-tapered clamping hub for precise centering and easy dismantling
- Provides galvanic isolation between engine and shaft
Installation Compatibility
Without adapter: The Bullflex 8 fits directly on Hurth, Velvet, Technodrive, ZF, and P.R.M. gearboxes (use stud and bolt set UNISET4/5).
With adapter: For other gearbox types, use the appropriate adapter flange (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, MS2 (all types) FLANGE3 Yanmar KM4A, KM4A1, KMH4A, KBW20-1, KBW21, Kanzaki KC180
Performance Ratings (at 3600 RPM)
- Gear 2:1 reduction – max 127 HP
- Gear 2.5:1 reduction – max 102 HP
Technical Specifications
Parameter Specification Model BULFL0814 (Bullflex Type 8) Shaft Diameter Ø 1 ¼" (30–40 mm) Overall Diameter 170 mm Height (L) 166 mm 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 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) Material High-grade marine rubber and steel flange Galvanic Isolation Yes
Dimensional Overview
- Type: Bullflex 8
- Flange size: Combined 4″
- Shaft diameter: 1 ¼″ (≈ 31.75 mm)
- Length L: 166 mm
- Diameter D: 170 mm
Advantages of the Bullflex Coupling
- Optimal damping of torsional vibrations
- Reliable and silent power transmission
- Excellent alignment and shaft centering
- Long service life with minimal maintenance
- Easy installation and dismantling
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