A shaft coupling, specifically a flexible shaft coupling, is a mechanical component used to connect the ends of two shafts in a motor or drive system, such as on a boat.
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1-2 weeks delivery time The Vetus COMBIFLEX Flexible Coupling provides a reliable and flexible connection between the engine and propeller shaft, reducing vibrations and ensuring smooth operation. It is ideal for both new installations and replacements in marine applications. Available in different sizes, it is designed to withstand the harsh conditions of the marine environment, offering excellent durability and ease of use.
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$ 470.10
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1-2 weeks delivery time The Vetus KO5 Flexible Coupling is designed to provide a reliable and efficient connection between your engine and propeller shaft. Featuring a special conical retainer, it ensures a precise, concentric fit, reducing installation time and improving performance. This coupling is available in various sizes to accommodate different shaft diameters, making it a versatile solution for marine propulsion systems.
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$ 588.63
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1-2 weeks delivery time The Vetus UNIFLEX Flexible Coupling provides a reliable and flexible connection between your propeller shaft and gearbox. Designed to dampen axial and radial vibrations, this coupling allows for up to a 2° misalignment in the shaft line, ensuring smooth operation even with slight shaft misalignment. Available in various sizes and types, it offers a versatile solution for marine propulsion systems. However, it is not compatible with V-Drives.
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$ 643.20
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1-2 weeks delivery time The Vetus BULLFLEX Flexible Coupling is designed for optimal vibration suppression, making it ideal for reducing noise and vibration in marine propulsion systems. Its unique rubber insert eliminates torsional vibrations, especially at low engine speeds, while also ensuring proper alignment even with a 2° misalignment. The Bullflex coupling provides reliable axial and radial protection, easy installation, and smooth torque transmission from the engine to the propeller, ensuring a long-lasting and comfortable boating experience.
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$ 651.28
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1-2 weeks delivery time The Centa Centaflex M Flexible Coupling is designed for yachts where vibration attenuation is critical, delivering smooth torque transmission even with rubber element wear. The range covers engines from 40 hp to 80 hp (depending on propeller shaft speed) and provides maximum torque up to 500 Nm. Technical variants include M-127 (250 Nm, 4500 rpm, L 89 mm, øR 153 mm) and M-160 (500 Nm, 3500 rpm, L 120 mm, øR 195 mm) with defined shaft diameter options. Couplings are supplied as single-piece items with dedicated product numbers and EAN codes.
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$ 480.82
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1-2 weeks delivery time The Centa Centaflex AM Flexible Coupling is designed for yachts and small commercial vessels and is based on the Centaflex classic clutch, enhanced with an additional rubber thrust bearing to support increased propeller thrust force. The range includes multiple sizes (AM12 to AM400) covering nominal torque from 175 Nm up to 7,500 Nm with maximum thrust force up to 35.00 kN depending on type. Typical operating limits reach 2,500–4,000 rpm (model dependent). Untreated coupling variants are available as single-piece items with dedicated product numbers and EAN codes.
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$ 615.44
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1-2 weeks delivery time Hollex flexible couplings are designed for Hurth-ZF drivetrain systems, providing flexible torque transmission while compensating for shaft misalignment. The range includes models with 4" and 4"–5" connection sizes and torque capacities from 140 Nm to 310 Nm. Each coupling is supplied as 1 piece and is intended for marine drivetrain installations where flexible connection between engine, shaft, and gearbox components is required.
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$ 135.13
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1-2 weeks delivery time Hollex Evolastic 860 flexible couplings are designed for flexible power transmission and vibration reduction in mechanical systems. The couplings feature elastomer construction that helps absorb vibration and noise while maintaining reliable connection between drivetrain components. The range includes models with shaft diameters Ø35 mm to Ø50 mm, compatible with 4"–5" connection sizes.
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$ 1,550.01
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What are the primary functions of a flexible shaft coupling in mechanical systems?
The primary functions of a flexible shaft coupling in mechanical systems include accommodating misalignment and reducing vibration between connected shafts. These couplings provide high torsional stiffness and flexibility, allowing them to handle angular, parallel, and axial misalignment while maintaining precision and minimizing backlash. For example, elastomer and flexible disc couplings are designed to absorb and isolate vibrations, protect drive components, and ensure smooth transmission of torque, making them suitable for high-speed applications and servomotors.
What types of misalignment can flexible shaft couplings accommodate in mechanical systems?
Flexible shaft couplings can accommodate various types of misalignment in mechanical systems, including angular, parallel, and axial misalignments. These couplings are designed to flex and compensate for shaft misalignment, ensuring smooth torque transmission and reducing wear on connected components. For example, R&D marine flexible couplings and twin disc couplings are made to handle significant shaft misalignment, providing zero backlash and maintaining high performance even under varying load conditions.
In what situations are flexible couplings more suitable than rigid couplings for servo motor applications?
Flexible couplings are more suitable than rigid couplings for servo motor applications when there is a need to accommodate shaft misalignment and reduce vibration. They are designed to handle torque while compensating for angular, parallel, and axial misalignments, ensuring smooth rotation and minimal friction. Flexible couplings, such as those featuring elastomer inserts or jaw configurations, provide better performance and longevity in high-rpm and dynamic environments, where rigid couplings might cause premature wear and alignment issues. For more information, contact us to discuss your application requirements and find the best shaft coupling for your needs.
What are the benefits of using elastomer inserts in flexible shaft couplings for managing shaft misalignment?
The benefits of using elastomer inserts in flexible shaft couplings for managing shaft misalignment include improved vibration damping and shock absorption, which protect the drivetrain and connected components. These inserts help flexible couplings to handle angular and parallel misalignments effectively, ensuring smooth and efficient torque transmission. Additionally, elastomer inserts make the couplings easy to install and maintain, as they provide a flexible yet durable connection between hubs of varying shaft diameters, reducing the need for frequent lubrication and inspection in various shaft applications.
What types of Boat Propeller Shaft do you have in your catalog?
Stern Tubes for Boats, Cutlass Bearings, Propeller Shaft Seals, Boat Propeller Nuts, Flexible Shaft Couplings, Marine CV Joint & Drive Shafts