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 Lasdrop Gen2 Mechanical Face Seal for Ø50mm propeller shafts and a 2-3/4” (Ø69.9mm) stern tube features a pressure housing system that eliminates the need for a bellows hose. This design offers enhanced durability and requires less maintenance, ensuring a longer service life for the seal.
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€ 857,31
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1-2 weeks delivery time This Lasdrop Gen2 Mechanical Face Seal, designed for Ø50mm propeller shafts and a 3-1/2” (Ø88.9mm) stern tube, eliminates the need for a bellows hose through its advanced pressure housing. The durable seal significantly reduces maintenance requirements, providing an efficient sealing solution for marine applications.
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€ 857,31
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1-2 weeks delivery time For Ø55mm propeller shafts and a 3-1/2” (Ø88.9mm) stern tube, the Lasdrop Gen2 Mechanical Face Seal uses a pressure housing to create compression without a bellows hose. This design extends the seal's lifespan and reduces maintenance needs compared to traditional bellows seals.
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€ 936,62
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1-2 weeks delivery time The Lasdrop Gen2 Mechanical Face Seal for Ø55mm propeller shafts and a 3-1/4” (Ø82.6mm) stern tube provides an innovative pressure housing that eliminates the need for a bellows hose. This seal offers superior durability and requires less maintenance, making it a reliable solution for marine propulsion systems.
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€ 936,62
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1-2 weeks delivery time The Lasdrop Gen2 Mechanical Face Seal for Ø55mm propeller shafts and 3" stern tubes features a pressure housing that eliminates the need for a bellows hose, ensuring a more durable and low-maintenance seal compared to traditional designs. The seal ring and spring rotate with the shaft, secured in the clamp/pressure housing.
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€ 936,62
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1-2 weeks delivery time This Lasdrop Gen2 Mechanical Face Seal for Ø60mm propeller shafts and 3-1/2" stern tubes offers a similar design to the previous model, eliminating the bellows hose and enhancing longevity. Its innovative pressure housing ensures a longer lifespan and minimal maintenance, with the seal ring and spring rotating with the shaft inside the clamp/pressure housing.
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€ 1.043,63
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1-2 weeks delivery time The Lasdrop Gen2 Mechanical Face Seal for Ø60mm propeller shafts and 3-3/4" stern tubes features a durable pressure housing that removes the need for bellows hoses. This design guarantees a longer-lasting seal, reducing the need for maintenance compared to traditional bellows seals, with the seal ring and spring rotating with the shaft, secured in the clamp/pressure housing.
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€ 1.043,63
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1-2 weeks delivery time The PSM 120 Dual Stage Damper Plate features a Ø352.4mm diameter with 26 teeth and fits SAE 11-1/2" flywheels. It offers high torque capacity with durable steel construction for demanding engine setups.
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€ 738,34
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1-2 weeks delivery time The PSM 60 Dual Stage Damper Plate with a diameter of 215.9mm is designed for lighter torque applications, supporting up to 500Nm of continuous torque and fitting 6-1/2" SAE J620 flywheels. It features 26 teeth, a hole pitch diameter of 200.02mm, and mounts using six 8.5mm holes, making it suitable for compact setups.
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€ 459,43
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1-2 weeks delivery time The PSM 60 Dual Stage Damper Plate with a 241.3mm diameter offers a balance between size and performance, handling 500Nm of continuous torque. It is compatible with SAE J620 7-1/2" flywheels and features 26 teeth, a hole pitch diameter of 222.25mm, and an 8-hole mounting pattern with 8.5mm diameter holes.
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€ 459,43
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1-2 weeks delivery time The PSM 60 Dual Stage Damper Plate with a 314.32mm diameter is suited for high torque demands, offering 600Nm of continuous torque and compatibility with SAE J620 10" flywheels. It features 26 teeth, a 295.3mm pitch diameter, and mounts using eight 11mm holes, ensuring strong and stable installation.
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€ 495,12
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1-2 weeks delivery time The PSM 60 Dual Stage Damper Plate with a 352.4mm diameter is built for high torque applications, supporting 600Nm of continuous torque and fitting SAE J620 11-1/2" flywheels. It has 26 teeth and is mounted using eight 11mm holes on a 333.4mm pitch diameter.
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€ 494,88
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1-2 weeks delivery time The PSMC 20 Single Stage Damper Plate with a 121.5mm diameter and plastic core supports 200Nm of continuous torque and has 10 teeth splines. It mounts using eight 6.5mm holes on a 111mm pitch and features a fixed height of 31mm.
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€ 134,55
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1-2 weeks delivery time The PSMC 20 Single Stage Damper Plate with a plastic core and 121.5mm diameter supports 250Nm of continuous torque with 26 teeth splines. It maintains the same 111mm hole pitch and 8 x 6.5mm mounting, with an adjustable height of 47.5 ± 6.5mm.
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€ 150,27
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1-2 weeks delivery time The PSMC 20 Single Stage Damper Plate with plastic core, 151.3mm in diameter, and 10 teeth splines supports 250Nm of continuous torque. It uses a mounting pattern of eight 6.5mm holes on a 140mm pitch and has an adjustable height of 47.5 ± 6.5mm.
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€ 150,41
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1-2 weeks delivery time The PSMC 20 Single Stage Damper Plate with a plastic core and 151.3mm diameter supports 200Nm of continuous torque with 26 teeth splines. It uses the same 8 x 6.5mm mounting pattern on a 140mm pitch and has an adjustable height of 47.5 ± 6.5mm.
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€ 150,41
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1-2 weeks delivery time The PSMC 20 Single Stage Damper Plate with a 159mm diameter and 10 splines is designed for 200Nm of continuous torque. It mounts using five 9mm holes on a 142mm pitch and has a fixed height of 31mm.
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€ 165,99
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1-2 weeks delivery time The PSMC 20 Single Stage Damper Plate with a plastic core, 159mm in diameter, and 26 teeth splines supports 200Nm of continuous torque. It uses five 9mm mounting holes on a 142mm pitch and has a height of 47.5 ± 6.5mm.
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€ 165,99
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1-2 weeks delivery time The PSMC 20 Single Stage Damper Plate with a plastic core and 185mm diameter includes 10 teeth splines and supports 200Nm of continuous torque. It mounts using six 6.5mm holes on a 175mm pitch and has a fixed height of 31mm.
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€ 165,99
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1-2 weeks delivery time The PSMC 20 Single Stage Damper Plate with plastic core and 185mm diameter features 26 teeth splines and supports 200Nm of continuous torque. It uses six 6.5mm holes on a 175mm pitch and has an adjustable height of 47.5 ± 6.5mm.
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€ 157,20
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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