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 Rope Cutter Grey/Red (ø150 - 55 mm) is a high-quality one-piece cutter designed for durability and efficiency, made from stainless steel 316L. It includes threadlocker, reusable protective shells, screws, and an allen key, with an outer diameter of 150 mm, inner diameter of 55 mm, and thickness of 31 mm.
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€ 765,95
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1-2 weeks delivery time Price incl. 19% VAT The Rope Cutter Grey/Red (ø150 - 60 mm) is a robust one-piece cutter made from stainless steel 316L, offering high durability and efficiency. It includes necessary components like threadlocker and protective shells, with an outer diameter of 150 mm, inner diameter of 60 mm, and thickness of 31 mm.
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€ 765,95
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1-2 weeks delivery time Price incl. 19% VAT The Rope Cutter Grey/Red (ø180 - 70 mm) is another high-quality one-piece cutter designed for durability and efficiency, constructed from stainless steel 316L. It features threadlocker, reusable protective shells, screws, and an allen key, with an outer diameter of 180 mm, inner diameter of 70 mm, and thickness of 31 mm.
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€ 832,54
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1-2 weeks delivery time Price incl. 19% VAT The Rope Cutter for Volvo SD130-SD150 (Product Number: KLASDSD130V) is designed for durability and efficiency in preventing rope entanglement, featuring a fixed blade propeller available in both fixed-blade and Radice folding options. It attaches to the propeller hub and includes a compact design with a shorter anode. The package comes with a short anode, a net brake burette, three M6 fixing screws, a hexagonal key, a 5 mm drill bit, an M6 tap, and one left-hand threaded screw.
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€ 369,52
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1-2 weeks delivery time Price incl. 19% VAT The Rope Cutter for Saildrive Yanmar SD20-30-40 (Product Number: KLASDSD2031Y) provides effective protection against underwater debris, designed specifically for Yanmar models. It attaches to the propeller hub and features a compact design with a shorter anode. The delivery includes a short anode, a thread lock burette, three M6 fixing screws, a hex key, a 5 mm drill bit, and an M6 tap.
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€ 452,62
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1-2 weeks delivery time Price incl. 19% VAT The Teflon Braid - Ø10 mm (per metre) is a braided R4804 type featuring ramie yarn with PTFE impregnation, designed to minimize shaft wear. It is available for purchase by the meter and is produced by Super Marine.
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€ 31,99
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1-2 weeks delivery time Price incl. 19% VAT The Teflon Braid - Ø12 mm (per metre) is made from ramie yarn enriched with PTFE, ensuring no wear on the shaft. Sold by the meter, this braid is designed for convenience and is produced by Super Marine.
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€ 42,77
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1-2 weeks delivery time Price incl. 19% VAT The Teflon Braid - Ø14 mm (per metre) is a durable R4804 braid constructed from ramie yarn with PTFE impregnation, aimed at protecting your shaft from wear. It is available for purchase by the meter from Super Marine.
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€ 59,03
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1-2 weeks delivery time Price incl. 19% VAT The Teflon Braid - Ø4 mm (per metre) is crafted from ramie yarn with PTFE, ensuring minimal wear on the shaft. This braided type is sold by the meter to meet your needs and is produced by Super Marine.
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€ 9,34
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1-2 weeks delivery time Price incl. 19% VAT The Teflon Braid - Ø5 mm (per metre) features a braided R4804 type made from ramie yarn with PTFE impregnation, designed to minimize wear on the shaft. Available by the meter, it is produced by Super Marine.
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€ 12,45
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1-2 weeks delivery time Price incl. 19% VAT The Teflon Braid - Ø6 mm (per metre) is constructed from ramie yarn and PTFE, ensuring minimal wear on the shaft, and is sold by the meter for your convenience, manufactured by Super Marine.
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€ 14,28
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1-2 weeks delivery time Price incl. 19% VAT The Teflon Braid - Ø8 mm (per metre) is a high-quality braided R4804 type featuring ramie yarn with PTFE impregnation, providing excellent protection against shaft wear. This braid is available for purchase by the meter and is produced by Super Marine.
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€ 21,79
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1-2 weeks delivery time Price incl. 19% VAT The Coupling - Ø100 mm for Shaft Ø22 mm is designed for efficient power transmission in mechanical systems, featuring included needle screws and keying, with four holes for secure attachment. It has a shaft diameter of Ø22 mm, an outer diameter of 100 mm, and a distance of 78 mm.
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€ 235,73
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1-2 weeks delivery time Price incl. 19% VAT The Coupling - Ø100 mm for Shaft Ø25 mm offers reliable performance and easy installation, including needle screws and keying, with four holes for fastening. It accommodates a shaft diameter of Ø25 mm, has an outer diameter of 100 mm, and a distance of 78 mm.
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€ 235,73
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1-2 weeks delivery time Price incl. 19% VAT The Coupling - Ø100 mm for Shaft Ø30 mm ensures optimal connection and stability for various applications, featuring included needle screws and keying, with four holes for secure attachment. It has a shaft diameter of Ø30 mm, an outer diameter of 100 mm, and a distance of 78 mm.
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€ 235,73
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1-2 weeks delivery time Price incl. 19% VAT The Coupling for Yanmar Engines - Ø100 mm for Shaft Ø35 mm is specifically designed for Yanmar engines, ensuring durability and reliability. Made from electro-cadmium steel, it includes needle screws and keying, has four holes, a shaft diameter of Ø35 mm, an outer diameter of 100 mm, and a distance of 78 mm.
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€ 235,73
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1-2 weeks delivery time Price incl. 19% VAT The Coupling - Ø110 mm for Shaft Ø25 mm provides a robust connection for various applications, made from electro-cadmium steel and featuring included needle screws and keying. It has four holes for fastening, accommodates a shaft diameter of Ø25 mm, an outer diameter of 110 mm, and a distance of 82 mm.
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€ 238,68
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1-2 weeks delivery time Price incl. 19% VAT The Coupling - Ø110 mm for Shaft Ø30 mm ensures strength and stability for secure connections, constructed from electro-cadmium steel and including needle screws and keying. It has four holes, a shaft diameter of Ø30 mm, an outer diameter of 110 mm, and a distance of 82 mm.
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€ 238,68
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1-2 weeks delivery time Price incl. 19% VAT The Coupling - Ø110 mm for Shaft Ø35 mm is designed to ensure effective power transmission in mechanical systems, made from electro-cadmium steel and including needle screws and keying. It features four holes, a shaft diameter of Ø35 mm, an outer diameter of 110 mm, and a distance of 82 mm.
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€ 238,68
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1-2 weeks delivery time Price incl. 19% VAT The Coupling for Yanmar Engines - Ø120 mm for Shaft Ø30 mm is specially crafted to provide optimal performance for Yanmar engines, made from electro-cadmium steel and including needle screws and keying. It has four holes, a shaft diameter of Ø30 mm, an outer diameter of 120 mm, and a distance of 100 mm.
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€ 241,63
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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