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 CV joint in the Python-Drive kit P501-L for shafts with a diameter of 60 to 80 mm, a maximum torque of 500 Kgm (4900 Nm), a maximum stop of 45 kN. For 420 hp (1900 RPM) engines with a 3:1 gearbox. Coupling diameter 198.1 mm, coupling length 221 or 260 mm (choice)
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1-2 weeks delivery time Price incl. 19% VAT Aquadrive CVB05.10 for shafts 20, 25, 30, 35 and 40 mm, coupling diameter 86 mm
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1-2 weeks delivery time Price incl. 19% VAT Aquadrive CVB10.10 for shafts 20, 25, 30, 35 and 40 mm, coupling diameter 94 mm
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1-2 weeks delivery time Price incl. 19% VAT Aquadrive CVB15.10 for shafts 20, 25, 30, 35 and 40 mm, coupling diameter 108 mm
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1-2 weeks delivery time Price incl. 19% VAT Aquadrive CVB21.10 for shafts 20, 25, 30, 35 and 40 mm, coupling diameter 128 mm
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1-2 weeks delivery time Price incl. 19% VAT Aquadrive CVB21.20 for shafts 35, 40, 45 and 50 mm, coupling diameter 128 mm, maximum stop 7 kN
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1-2 weeks delivery time Price incl. 19% VAT Aquadrive CVB30.20 for shafts 35, 40, 45 and 50 mm, coupling diameter 148 mm, maximum stop 7 kN
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1-2 weeks delivery time Price incl. 19% VAT Aquadrive CVB30.30 for shafts 40, 45, 50, 55, 60 and 65 mm, coupling diameter 148 mm, maximum stop 9 kN
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1-2 weeks delivery time Price incl. 19% VAT Aquadrive CVB43.30 for shafts 40, 45, 50, 55, 60 and 65 mm, coupling diameter 192 mm, maximum stop 9 kN
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1-2 weeks delivery time Price incl. 19% VAT For over 30 years, Aquadrive has been a trusted manufacturer of quality transmissions for marine applications. The advantages of Aquadrive systems are numerous and evident. They transform your boat's propulsion into a smoother, quieter, and vibration-free experience. With Aquadrive, the need for engine alignment becomes unnecessary.
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1-2 weeks delivery time Price incl. 19% VAT Aquadrive HDL42.680, coupling diameter 192 mm
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1-2 weeks delivery time Price incl. 19% VAT HDL60.700, coupling diameter 275 mm
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1-2 weeks delivery time Price incl. 19% VAT Aquadrive HDL60.780, coupling diameter 275 mm
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1-2 weeks delivery time Price incl. 19% VAT CENTAFLEX coupling type M for flexible coupling, especially for yachts where there are many requirements for vibration attenuation. It is offered in two sizes, with a capacity of 40 hp to 80 hp (depending on the speed of the propeller shaft). For decades, thousands of these couplings have been operating reliably on motor boats and sailing yachts. The large volume rubber element provides even torque transmission. The couplings have a turning retainer, so that the vessel remains controllable even if the rubber element breaks. Torque up to 500 Nm. Type M 127 has a standard 4 "flange connection. Type M 160 has both a 4 "and a 5" connection. Yanmar types are supplied with a connecting flange of Ø25 to 30 mm.
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€ 684,75
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1-2 weeks delivery time Price incl. 19% VAT CENTAFLEX-AM is based on the world-famous CENTAFLEX classic clutch, designed specifically for yachts and small commercial vessels. It was retrofitted with an additional rubber thrust bearing for additional thrust force on the propeller. 11 sizes cover the power range of the entire typical series. CENTAFLEX-AM is very flexible and has proven itself reliably on motor boats, large yachts and ferries. Rotating moments 175-14.000 Nm.
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1-2 weeks delivery time Price incl. 19% VAT The CENTAFLEX Centa M Elastic Coupling is specifically designed for flexible coupling applications, particularly in yachts where vibration attenuation is crucial. It is available in two sizes, catering to a range of power requirements from 40 hp to 80 hp (depending on the propeller shaft's speed). Thousands of these reliable couplings have been in operation for decades on motor boats and sailing yachts, ensuring smooth and efficient power transmission.
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1-2 weeks delivery time Price incl. 19% VAT CENTAFLEX ACV is a highly elastic coupling from Exalto that provides maximum comfort and flexible connection in the joint. Torque is transmitted by articulated shaft. The thrust force of the propeller is removed through the thrust bearing and with the help of a flange, which is located directly on the hull of the boat. The motor remains free from the forces created by the propeller and can be mounted elastically. Eleven sizes have proven themselves reliably in operation on various ship drives. Rotational moments 100-14.000 Nm.
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1-2 weeks delivery time Price incl. 19% VAT SKF SR thrust bearing. Exalto supplies two types of bearings: - Type ST: has a conical clamping sleeve that is mounted na the ingekamerde axis. - Type SR: with a conical clamping sleeve that is pressed directly onto the outside diameter of the shaft. The bearing is approximately 1/3 full of oil. Delivery up to 100 mm. Large bearings are available upon request. All dimensions in millimeters
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€ 545,59
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1-2 weeks delivery time Price incl. 19% VAT TOR FLM connecting flange made of stainless steel grade C45, body galvanized. Fully zinc-treated and available in a variety of sizes. The diameter is indicated in the product card, or our specialist will find the right one for you. Elevation R in the table indicates the number of bolt holes in the flange. Versions Ø 25 and 30 mm for the shaft have a "connector 4." The connecting flange for the shaft Ø 35 and 40 mm has a 5 "connector.
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€ 174,22
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1-2 weeks delivery time Price incl. 19% VAT The Exalto Propeller Shaft-Hub Clamping Set is a versatile and adaptable solution designed for various marine applications. The connection flange is available in two forms: standard and machined, providing flexibility to meet specific requirements. These flanges can be customized to be compatible with CV joint couplings, Aquadrive thrust bearings, and all commonly used gearboxes.
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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