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 Bronze Shaft Bearing, designed for hydro lubrication, ensures smooth operation and durability across various applications. It features a product number of 2727740 FNI, a size of 40 mm, and is made of bronze and rubber, categorized as a shaft bearing.
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€ 131,08
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1-2 weeks delivery time Price incl. 19% VAT The Bronze Shaft Bearing, with a size of 45 mm and product number 2727745 FNI, is designed for durability and efficiency in various mechanical applications. Constructed from bronze and rubber, this hydro-lubricated shaft bearing ensures smooth operation even in challenging conditions.
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€ 153,51
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1-2 weeks delivery time Price incl. 19% VAT The Bronze Shaft Bearing, designed for optimal performance and durability, features a size of 50 mm and is constructed from bronze with a rubber lining. Its hydro-lubricated design ensures effective lubrication and reliable operation in various challenging applications. The product number is 2727750 FNI.
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€ 182,83
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1-2 weeks delivery time Price incl. 19% VAT The Bronze Shaft Bearing, product number 2727755 FNI, is a high-quality 55 mm component made of bronze and rubber, designed for durability and efficient performance in various applications. It operates as a hydro-lubricated shaft bearing, ensuring optimal functionality.
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€ 251,82
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1-2 weeks delivery time Price incl. 19% VAT The Bronze Shaft Bearing, with a product number of 2727760 and a size of 60 mm, is built for durability and optimal performance in various applications. Made of bronze with a rubber lining, this hydro-lubricated shaft bearing ensures smooth operation under challenging conditions.
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€ 265,62
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1-2 weeks delivery time Price incl. 19% VAT The Bronze Shaft Bearing 65 mm is a durable and high-performance component designed for various industrial and mechanical applications. Made from high-quality bronze and rubber, this hydro-lubricated shaft bearing provides reliable support and movement under tough conditions. Its product number is 2727765 FNI, and it is specifically engineered to meet the demands of multiple settings.
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€ 308,74
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1-2 weeks delivery time Price incl. 19% VAT The Bronze Shaft Bearing, with a diameter of 70 mm, is designed for excellent performance in various applications, particularly in hydro-lubricated environments. Its durable and reliable construction, made from bronze and rubber, makes it an ideal choice for shaft bearing needs, identified by the product number 2727770 FNI.
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€ 389,80
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1-2 weeks delivery time Price incl. 19% VAT The Bronze Shaft Bearing, with a diameter of 75 mm and product number 2727775 FNI, is designed for applications that require durability and reliable lubrication. Made from bronze and rubber, this hydro-lubricated shaft bearing is ideal for various industrial uses due to its robust construction and optimal performance in hydro-lubricated environments.
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€ 520,89
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1-2 weeks delivery time Price incl. 19% VAT The Bronze Shaft Bearing, measuring 80 mm, is designed for reliable performance in hydro-lubricated environments. Constructed from a combination of bronze and rubber, it offers durability and enhanced efficiency. Product number 2727780 FNI identifies this shaft bearing, which is ideal for various applications.
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€ 543,31
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1-2 weeks delivery time Price incl. 19% VAT The Bronze Shaft Bearing, product number 2727790 FNI, is designed for optimal performance in hydro-lubricated applications. With a diameter of 90 mm, it features a robust construction made of bronze with a rubber component, ensuring durability and efficiency across various operating conditions.
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€ 714,07
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1-2 weeks delivery time Price incl. 19% VAT The Hemp Braid 6X6 mm is specifically designed for reliable watertight sealing of propeller shafts, ensuring optimal performance in aquatic environments. Made from sealed hemp, it features a square-section gland and is suitable for propeller shaft diameters of 20-25 mm. The product is available in packs of 2 meters, with the product number 2727811 FNI.
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€ 7,83
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1-2 weeks delivery time Price incl. 19% VAT The Hemp Braid 8X8 mm is a high-quality sealing product designed for reliable watertight applications, particularly for propeller shafts in marine and industrial settings. With a square-section gland, it fits shafts with a diameter of 20-25 mm and comes in a 2-meter pack. Its FNI product number is 2727812.
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€ 12,14
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1-2 weeks delivery time Price incl. 19% VAT The Hemp Braid 10X10 mm is a reliable solution for watertight sealing of propeller shafts in marine applications, featuring a square-section gland made from sealed hemp. Designed for shafts with a diameter of 20-25 mm, this product comes in a 2-meter pack and ensures durable performance. Product number: 2727813 FNI.
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€ 15,58
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1-2 weeks delivery time Price incl. 19% VAT The Hemp Braid is a durable sealing solution specifically designed for maintaining watertight integrity in propeller shafts. With dimensions of 12X12 mm and made from hemp sealed material, it features a square-section gland and is compatible with shaft diameters of 20-25 mm. Each pack contains 2 meters of this effective sealing solution, ensuring reliable performance for various applications. FNI Product Number: 2727814.
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€ 18,69
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1-2 weeks delivery time Price incl. 19% VAT The Seals RMTA is a high-performance seal designed for shaft diameters of 25 mm, made from flame-retardant rubber for enhanced durability. It operates effectively in temperatures ranging from -10 °C to +80 °C and is resistant to oil and grease, ensuring low friction. The product includes stainless steel cable ties and a packet of silicone grease that is seawater-resistant.
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€ 112,11
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1-2 weeks delivery time Price incl. 19% VAT The RMTA seals, designed for reliable protection and efficient operation in various conditions, are suitable for shafts with a diameter of 30 mm. Made from flame retardant rubber (CR), they can withstand contact with oil or grease, offering minimal friction and long service life. The seals operate effectively within a temperature range of -10 °C to +80 °C and come with stainless steel cable ties and a packet of seawater-resistant silicone grease.
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€ 120,74
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1-2 weeks delivery time Price incl. 19% VAT The Seals RMTA is a durable sealing solution designed for a shaft diameter of 35 mm, constructed from flame-retardant rubber ('CR') to withstand challenging conditions. Featuring oil and grease resistance, low friction characteristics, and including stainless steel cable ties and sea-water resistant silicone grease, it operates effectively within a temperature range of -10 °C to +80 °C.
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€ 146,61
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1-2 weeks delivery time Price incl. 19% VAT The Seals RMTA with a bronze bearing is designed for 40 mm diameter shafts, offering optimal performance and durability. Made from flame retardant rubber, it operates effectively in temperatures ranging from -10 °C to +80 °C, providing excellent protection against contaminants while reducing friction. Key features include resistance to oil and grease, low friction values, stainless steel cable ties, and a seawater-resistant silicone grease packet.
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€ 200,08
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1-2 weeks delivery time Price incl. 19% VAT The RMTA seals are designed for reliable performance under various conditions, making them ideal for durable applications. With a shaft diameter of 25 mm, they are made from flame-retardant rubber and can operate in temperatures ranging from -10 °C to +80 °C, while being resistant to oil and grease. The package includes stainless steel cable ties and a packet of seawater-resistant silicone grease, ensuring low friction values for enhanced efficiency.
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€ 110,39
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1-2 weeks delivery time Price incl. 19% VAT The RMTA seals, designed for shafts with a diameter of 30 mm, offer reliable performance and durability, made from high-quality flame retardant rubber (CR) and suitable for operating temperatures between -10°C and +80°C. These seals are resistant to oil and grease, feature low friction values, and come with stainless steel cable ties and silicone grease resistant to seawater, ensuring optimal functionality in various environments.
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€ 120,74
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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