A boat propeller shaft, particularly for inboard systems, is a critical component designed to transmit power from the engine to the propeller, facilitating the propulsion of the boat. The propeller shaft passes through the hull via a stuffing box or seal, which prevents water entry while allowing the shaft to rotate freely. This setup is crucial for efficient boat operation, ensuring that the propeller receives the engine's power without any significant power loss, thus maintaining optimal performance and fuel efficiency in marine vessels.
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1-2 weeks delivery time Price incl. 19% VAT The Ø40 - 76mm shaft seal is engineered for high performance and reliability, accommodating a 40 mm shaft size and a stern tube outer diameter of 76 mm. It includes one water line and is branded by SureSeal, with the product number FSKM-40M-76M-0.
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€ 847,25
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1-2 weeks delivery time Price incl. 19% VAT The Ø40 - 67mm shaft seal ensures effective sealing and longevity, fitting a 40 mm shaft size and a stern tube outer diameter of 67 mm. It features one water line and is produced by SureSeal, with the product number FSKM-40M-67M-0.
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€ 797,19
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1-2 weeks delivery time Price incl. 19% VAT The Ø40 - 60mm shaft seal provides reliable sealing for various applications, accommodating a 40 mm shaft size and a stern tube outer diameter of 60 mm. It includes one water line and is manufactured by SureSeal, with the product number FSKM-40M-60M-0.
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€ 797,19
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1-2 weeks delivery time Price incl. 19% VAT The Ø40 - 64mm shaft seal is designed for optimal performance and durability, fitting a 40 mm shaft size and a stern tube outer diameter of 64 mm. It features two water lines and is branded by SureSeal, with the product number FSKM-40M-64M-1.
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€ 797,19
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1-2 weeks delivery time Price incl. 19% VAT The Ø35 - 67mm self-aligning shaft seal is designed for enhanced performance and longevity in marine environments. It features a 35 mm shaft size and a stern tube outer diameter of 67 mm, constructed from durable fiber-reinforced composite material.
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€ 586,13
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1-2 weeks delivery time Price incl. 19% VAT The Ø35 - 60mm shaft seal offers a drip-free solution for inboard propeller shafts, ensuring reliability with a 35 mm shaft size and a stern tube outer diameter of 60 mm. It is made from a fiber-reinforced composite that resists temperature changes and water absorption.
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€ 586,13
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1-2 weeks delivery time Price incl. 19% VAT The Ø35 - 57mm shaft seal is engineered for performance and durability, suitable for marine applications. It features a 35 mm shaft size, a stern tube outer diameter of 57 mm, and includes innovative features like a removable front cap for easy lip seal replacement.
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€ 586,13
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1-2 weeks delivery time Price incl. 19% VAT The 2 1/4" X 3 1/2" self-aligning shaft seal is designed for larger shaft sizes, providing durability and efficiency with a shaft size of 2-1/4 inch and a stern tube outer diameter of 3-1/2 inch, featuring two water lines.
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€ 1.029,76
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1-2 weeks delivery time Price incl. 19% VAT The 2" X 3 1/2" self-aligning shaft seal ensures a tight fit and reliable sealing for various marine equipment. It fits a 2 inch shaft size and has a stern tube outer diameter of 3-1/2 inch, along with one water line.
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€ 966,57
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1-2 weeks delivery time Price incl. 19% VAT The 2" X 3 1/4" self-aligning shaft seal is built for optimal performance in marine applications, fitting a shaft size of 2 inch and a stern tube outer diameter of 3-1/4 inch. It includes two water lines for effective sealing.
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€ 966,57
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1-2 weeks delivery time Price incl. 19% VAT The 1 3/4" X 3 1/2" self-aligning shaft seal provides enhanced performance and reliability, ensuring a secure fit and minimizing leaks. It is ideal for marine equipment, featuring a self-aligning design for easier installation and reduced wear.
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€ 844,24
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1-2 weeks delivery time Price incl. 19% VAT The 1 3/4" X 2 3/4" self-aligning shaft seal is engineered for optimal performance in marine environments, accommodating a shaft size of 1-3/4 inch. It guarantees a secure seal with a stern tube outer diameter of 2-3/4 inch and one water line.
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€ 844,24
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1-2 weeks delivery time Price incl. 19% VAT The 1 1/2" X 2 5/8" self-aligning shaft seal is designed for reliable performance in marine applications, fitting a shaft size of 1-1/2 inch and ensuring durability and efficiency. It features a stern tube outer diameter of 2-5/8 inch and includes two water lines.
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€ 798,53
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1-2 weeks delivery time Price incl. 19% VAT The Vetus COMFL1225, or Combiflex 12 Flexible Shaft Coupling 25mm Max 107hp, is meticulously engineered to provide optimal damping of torsional vibrations, ensuring smooth operation and extended durability for marine propulsion systems. Combining the best features of UNIFLEX and BULFLEX couplings, it offers easy installation and servicing, high flexibility, and excellent centering of the shaft, even at misalignment, making it an ideal choice for marine engines up to 107 horsepower. With its built-in thrust damper and secure design, the COMFL1225 guarantees reliable performance in various operating conditions, providing peace of mind for boat owners.
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€ 349
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1-2 weeks delivery time Price incl. 19% VAT The Vetus COMFL1230, also known as the Combiflex 12 Flexible Shaft Coupling, is meticulously engineered to provide optimal damping of torsional vibrations, ensuring smooth operation and extended durability for marine propulsion systems. With its combination of the best features from UNIFLEX and BULFLEX couplings, easy installation and servicing, high flexibility, and secure attachment against shearing off, it offers reliable performance for engines up to 107 horsepower. Featuring a built-in thrust damper and the option to remove the centering ring, the COMFL1230 guarantees efficient vibration damping and reliable operation, making it an ideal choice for marine applications.
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€ 349
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1-2 weeks delivery time Price incl. 19% VAT The Vetus COMFL1325 Combiflex-type Coupling 13 is a versatile solution designed for propeller shafts with a diameter of Ø 25 mm. Offering optimal vibration damping and simplified installation, this coupling combines the best features of two models into a single innovative design. It ensures efficient and reliable performance, making it an ideal choice for marine applications where minimizing vibrations and facilitating easy installation are crucial factors for smooth and reliable operation.
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€ 349
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1-2 weeks delivery time Price incl. 19% VAT The Vetus COMFL1330 is a remarkable Combiflex-type coupling that integrates the best features from the UNIFLEX and BULFLEX flexible shaft couplings, catering to engines with a power range of up to 48hp. Known for its ease of installation and removal for servicing, this coupling features a common 4" flange that fits most gearboxes. Offering very high flexibility, optimum vibration damping, and security against axial and radial shearing, it permits misalignment of up to 2°. The coupling excels in centering the shaft, even at 2° misalignment, and remains centered in reverse gear. With additional features like a removable centering ring, built-in thrust damper, and a non-tapered clamping hub for perfect centering and easy assembly/dismantling, the COMFL1330 ensures reliable and efficient performance in marine applications.
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€ 349
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1-2 weeks delivery time Price incl. 19% VAT Experience smooth and precise shaft coupling with the Vetus KO51 Flexible Coupling TYPE 6, meticulously crafted to ensure seamless integration with 25mm shafts. This coupling's innovative design, featuring a special conical clamping hub, guarantees perfect concentric assembly, offering reliability and efficiency for marine propulsion systems.
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€ 437
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1-2 weeks delivery time Price incl. 19% VAT Enhance your marine propulsion system with the Vetus KO52 Flexible Coupling TYPE 6, meticulously crafted to ensure seamless integration and optimal performance for 30mm shafts. With its innovative design and precision engineering, this coupling guarantees reliable and efficient operation, making it the ideal choice for V-drive setups and demanding marine applications.
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€ 437
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1-2 weeks delivery time Price incl. 19% VAT Experience enhanced marine propulsion performance with the Vetus KO53 Flexible Coupling Type 6, meticulously designed to ensure optimal vibration damping and precise alignment for 35mm shafts, making it the perfect solution for marine applications demanding reliability and efficiency.
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€ 437
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How does the material of an inboard boat propeller shaft impact its performance and longevity?
The material of an inboard boat propeller shaft significantly influences both its performance and longevity. Typically crafted from stainless steel or sometimes bronze, these materials are chosen for their strength, resistance to corrosion, and ability to withstand the harsh marine environment. Stainless steel shafts, for example, offer excellent toughness and resistance to pitting and crevice corrosion, crucial for maintaining the integrity and efficiency of the marine propeller shaft over time. The durability of these materials ensures that the shaft can handle the mechanical stresses of transmitting power from the engine to the propeller without deforming or failing, thereby providing reliable performance and reducing the need for frequent replacements.
The precision in manufacturing inboard propeller shafts is crucial for optimal performance and longevity. Leading manufacturers use CNC (Computer Numerical Control) machining to ensure that each prop shaft is crafted to exact specifications, maintaining balance and reducing vibrations. This precision helps in achieving a seamless fit between the prop shaft and the prop hub, which is essential for the smooth transmission of power. Utilizing advanced manufacturing techniques, these inboard propellers are designed to meet the high standards of the marine industry, ensuring reliable and efficient operation in various boating conditions.
What are the common types of bearings used with marine prop shafts to ensure smooth operation?
Common types of bearings used with marine propeller shafts include cutlass bearings and roller bearings. Cutlass bearings, made from durable rubber and sometimes embedded with brass or other metals, are particularly favored for their ability to handle the high loads and abrasive conditions typical in the marine environment. These bearings ensure smooth operation by allowing the boat propeller shaft to rotate freely while minimizing friction and wear. Roller bearings, although less common in marine settings due to their susceptibility to corrosion, may also be used in some inboard boat propeller shaft designs where sealed units can protect against water ingress, offering efficient rotational performance and reliability.
Stainless steel inboard propellers and custom propeller solutions are crucial for achieving high performance and reliability in various boating conditions. Boat builders often choose stainless steel shafts and custom inboard propellers for their strength and resistance to corrosion. Various companies offer a range of shaft sizes and materials, including A19, A17, and A22 stainless shafts, ensuring durability and precision. Custom inboard propellers and shafts are machined to exact specifications, such as SAE J755 standards, to provide the best fit and performance. These components are essential for maintaining the integrity of the boat's propulsion system, reducing the risk of issues like bent prop shafts, and ensuring consistent and efficient power delivery.
What maintenance practices are essential for ensuring the longevity of marine propeller shafts?
Regular maintenance is crucial to ensure the longevity of marine propeller shafts. Key practices include frequent inspections for signs of wear or corrosion, particularly on inboard boat propeller shafts which are constantly exposed to marine elements. Lubrication of the shaft and its bearings is also essential to reduce friction and prevent overheating during operation. Additionally, it's important to check the alignment of the shaft periodically to ensure it has not shifted, as improper alignment can lead to uneven wear and potential damage to both the shaft and associated components, thereby maintaining optimal performance of the boat propeller shaft.
Maintaining the boat shaft also involves understanding the specific needs and variations of your equipment. General propeller-gp and exclusive boat shaft solutions are available for different boating requirements, ensuring the right fit and performance. OEM stock parts, including propeller tapers, are known throughout the marine industry for their reliability. Contact us for more information on our selection of precision-machined, high-strength shafts, which are cut to SAE J755 standards and offered with quick delivery. Our products strive to provide exceptional and innovative solutions for all boating needs. We look forward to assisting you with the finest boat shafts and components to support your important boating skills.
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