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 The M-127 3.2 Centaflex Coupling is a durable option for inboard marine engines, offering a torque capacity of 250 Nm for pleasure craft. With excellent compatibility with Volvo gearboxes, it ensures reliable performance and smooth torque transfer, accommodating up to 2° of angular misalignment.
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$ 750,75
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1-2 weeks delivery time The M-127 3.3 Centaflex Coupling is designed for inboard applications, offering torque handling up to 250 Nm and supporting up to 2° of angular misalignment. It is compatible with ZF-BW7-Bukh gear types, providing robust performance and reliable torque transfer for pleasure craft.
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$ 453,88
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1-2 weeks delivery time The M-127 3.4 Centaflex Coupling is built for inboard engine setups, providing consistent torque transfer and adaptability under misalignment. With a maximum torque rating of 250 Nm for pleasure craft, it is compatible with Farymann gear types and ensures smooth operation at up to 4500 RPM.
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$ 750,75
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1-2 weeks delivery time The M-127 3.7 Centaflex Coupling is ideal for smaller inboard configurations, supporting up to 250 Nm of torque and ensuring performance under misalignment. It is designed for use with ZF-BW6 gear types, offering reliable torque transfer with a maximum RPM of 4500.
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$ 750,75
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1-2 weeks delivery time The M-160 1.0 Centaflex Coupling offers robust performance with a maximum torque capacity of 500 Nm for pleasure craft. It is designed for inboard systems with high misalignment tolerance, supporting up to 3500 RPM and compatible with a variety of marine gear types for reliable power transfer.
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$ 747,06
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1-2 weeks delivery time The M-160 1.1 Centaflex Coupling is designed for smooth integration with Paragon gear systems, offering high torque handling up to 500 Nm. It ensures stable performance under misalignment and is suitable for use in pleasure craft with a maximum RPM of 3500.
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$ 859
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1-2 weeks delivery time The M-160 2.2 Centaflex Coupling offers a compact design with a maximum torque of 500 Nm for pleasure craft applications. It is compatible with Kanzaki and Yanmar marine gearboxes and provides reliable torque transmission while accommodating angular misalignment up to 2°.
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$ 978,21
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1-2 weeks delivery time The M-160 3.2 Centaflex Coupling is engineered for robust performance in pleasure craft, handling up to 500 Nm of torque. It is designed for use with Volvo MS2 gear types and ensures reliable torque transfer, with a maximum RPM of 3500 and a maximum allowable angular misalignment of 2°.
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$ 978,21
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1-2 weeks delivery time The M-160 3.3 Centaflex coupling offers a maximum pleasure torque of 500 Nm and is designed for shafts with a 47 mm diameter. With a flange thickness of 74.5 mm, it features M8 bolts arranged at four 90-degree intervals, ensuring secure fastening. The coupling can handle a maximum of 3500 rpm and has a commercial torque of 350 Nm. Its design allows for up to 2° of angular misalignment.
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$ 1.002,27
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1-2 weeks delivery time The M-160 3.5 Centaflex coupling supports a pleasure torque of 500 Nm and fits shafts with a 45 mm diameter. It has a flange thickness of 85 mm and is fastened with M10 bolts in a 4x90° configuration. This coupling is rated for a maximum of 3500 rpm, with a commercial torque of 350 Nm. It is compatible with Farymann 95W gear types and other models using an adapter.
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$ 1.002,27
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1-2 weeks delivery time The AGM-140 model of Centaflex flexible propeller shaft coupling is engineered for inboard applications in pleasure crafts. It offers reliable performance, effectively managing thrust and misalignment, with a maximum torque capacity of 1875 Nm and a maximum RPM of 1500. The coupling is designed to handle a maximum angular misalignment of 2x3°.
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$ 6.639,27
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Centaflex Flexible Propeller Shaft Coupling With Thrust Bearing, AGM-16, Max. 250nm (Pleasure Craft)
1-2 weeks delivery time The AGM-016 Centaflex flexible coupling is designed for higher rotational speeds, making it ideal for smaller pleasure crafts. It provides dependable torque transmission, offering a maximum torque capacity of 250 Nm and a maximum RPM of 3000. This model supports angular misalignment up to 2x3°.
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$ 1.898,04
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1-2 weeks delivery time The AGM-200 Centaflex coupling is built for high-load pleasure craft use, offering exceptional torque handling with a maximum torque capacity of 3000 Nm. It operates at a maximum RPM of 1500, compensating for angular misalignment of up to 2x3° to ensure reliable shaft alignment in marine environments.
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$ 11.292,05
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Centaflex Flexible Propeller Shaft Coupling With Thrust Bearing, AGM-25, Max. 375nm (Pleasure Craft)
1-2 weeks delivery time The AGM-25 Centaflex flexible shaft coupling is designed for inboard use in pleasure crafts. It supports robust torque handling with a maximum torque capacity of 375 Nm and a maximum RPM of 2500, all while accommodating angular misalignment of up to 2x3° for demanding marine applications.
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$ 2.229,70
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Centaflex Flexible Propeller Shaft Coupling With Thrust Bearing, AGM-30, Max. 625nm (Pleasure Craft)
1-2 weeks delivery time The AGM-30 Centaflex shaft coupling is built to support higher torque for pleasure crafts. With a maximum torque capacity of 625 Nm and a maximum RPM of 2000, it maintains performance under angular misalignment of up to 2x3°, ensuring reliability for marine propulsion systems requiring higher capacity.
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$ 2.588,84
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Centaflex Flexible Propeller Shaft Coupling With Thrust Bearing, AGM-50, Max. 870nm (Pleasure Craft)
1-2 weeks delivery time The AGM-50 Centaflex flexible coupling is the highest torque-rated model in this series, designed for demanding pleasure craft propulsion systems. With a maximum torque capacity of 870 Nm and a maximum RPM of 2000, it integrates a thrust-bearing support, offering smooth transmission and effective alignment handling.
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$ 3.104,83
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1-2 weeks delivery time The AGM-80 Centaflex coupling is engineered for high torque transmission in marine applications. It provides a maximum torque capacity of 1125 Nm for pleasure crafts and supports angular misalignment up to 2x3°, operating effectively at a maximum RPM of 2000 to ensure optimal performance.
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$ 3.881,43
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1-2 weeks delivery time Hub Damper Plate 10 Teeth, Low Profile, H=37mm, Working Length=31mm: The Hub Damper Plate, designed for Polar Star PSMC 20 systems, reduces vibrations and enhances efficiency. It features a low-profile design, a height of 37mm, and a working length of 31mm, identified by article number 300302.
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$ 147,81
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1-2 weeks delivery time The Hub Damper Plate with 26 teeth is designed for Polar Star PSMC 20 single-stage damper plates, featuring a low-profile build with a height of 37mm and a working length of 31mm. This damper plate is built for high performance and durability.
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$ 106,98
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1-2 weeks delivery time The Hydradrive Adapter 4", Centre Ø45mm, Pitch Ø75mm, 4x Ø10mm, fits Hydradrive models HD-108 and HD-113 CV-shafts, featuring a centre diameter of 45mm, pitch diameter of 75mm, and four 10mm holes.
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$ 258,86
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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