A propeller shaft seal, often integrated into a stern tube shaft seal or a propeller shaft stuffing box, is a vital component in marine vessels. It ensures a watertight seal around the propeller shaft, preventing water from entering the boat through the stern tube while allowing the shaft to rotate freely.
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1-2 weeks delivery time The STB stuffing box seal kit is a traditional packing gland solution for marine shaft sealing systems. Designed for shaft diameters from 25 mm to 50 mm and 1" to 2", with stern tube sizes from 42 mm to 70 mm. Features flexible bellows with clamp mounting and controlled water lubrication via bushing, supplied as a complete installation kit.
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$ 83.24
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1-2 weeks delivery time The STB water-lubricated shaft seal is a stern tube sealing system designed for marine propulsion applications. Suitable for shaft diameters from 25 mm to 50 mm and 1" to 2", with stern tube diameters from 42 mm to 70 mm. Features a flexible bellows construction with clamp mounting and integrated water supply for lubrication and cooling.
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$ 91.39
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1-2 weeks delivery time The Super Marine rubber shaft seal is a lip-type stern tube seal for marine propulsion systems. Designed for shaft diameters from 22 mm to 40 mm with stern tube diameters from 38 mm to 60 mm. Made from oil- and temperature-resistant rubber and supplied ready for installation with stainless steel clamps, grease tube, and grease nipple. Available with or without water injection.
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$ 101.80
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1-2 weeks delivery time The Vetus ZWBH is a flexible triple lip shaft seal with integrated bearing for water-lubricated shaft systems. Designed for shaft diameters Ø25–35 mm, it features a self-aligning rubber housing with brass support, triple sealing lips, and a 10 mm water hose connection. Operating temperature range: 15°C to +85°C.
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$ 142.11
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1-2 weeks delivery time The Vetus ZWBH is a flexible triple lip shaft seal with integrated bearing for water-lubricated shaft systems. Designed for shaft diameters Ø25–35 mm, it features a self-aligning rubber housing with brass support, triple sealing lips, and a 10 mm water hose connection. Operating temperature range: 15°C to +85°C.
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$ 379.18
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1-2 weeks delivery time The Volvo VP-NBR Propeller Shaft Seals are flexible rubber shaft seals designed for marine stern tube applications. Manufactured from NBR (Nitrile Butadiene Rubber), they provide reliable sealing around propeller shafts, preventing water ingress while ensuring smooth shaft rotation. These seals are available for shaft diameters from 25 mm to 2″, making them suitable for a wide range of Volvo-type marine installations.
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$ 294.10
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1-2 weeks delivery time The Maucour bronze stuffing box is a floating packing gland shaft seal for marine propulsion systems. Designed for shaft diameters Ø22–40 mm, it features a reinforced hose connection, flange compression sealing, and includes stainless steel clamps with PTFE packing (unassembled) for adjustable sealing performance.
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$ 361.51
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1-2 weeks delivery time The Lasdrop DrySeal is a maintenance-free shaft lip seal for marine propulsion systems, designed for shafts from 22 to 60 mm. Available with single or double water injection, it features a split front housing for easy seal replacement without shaft removal.
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$ 437.81
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1-2 weeks delivery time The Lasdrop Gen2 is a mechanical face shaft seal with stainless steel and carbon sealing surfaces, designed for shafts from 25 to 60 mm. It provides 100% dripless operation, no shaft wear, and uses a premium silicone hose instead of traditional bellows.
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$ 761.25
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1-2 weeks delivery time The Tides Marine seriesOne™ stern tube shaft seal is designed for smaller, single-engine vessels with stainless steel propeller shafts, covering shaft diameters from 7/8″ to 1 1/4″ (in 1/8″ steps) and metric shafts from 25 mm to 30 mm. The lip seal is not replaceable—when worn, the entire housing must be replaced. Each kit includes an application-specific articulating hose (single or multi-convolution option) and four 316 stainless steel hose clamps, and requires a pressurized water supply with 1 gallon per minute at idle.
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$ 474.99
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1-2 weeks delivery time The Tides Marine SureSeal Single Injection Propeller Shaft Seal is a drip-free, self-aligning sealing system for stainless steel propeller shafts, supplied as a kit with an articulating hose and four hose clamps. The SureSeal housing is made from fiber-reinforced composite, includes an integral PTFE bearing, and uses a replaceable lip seal accessed through a removable front cap. Cooling/lubricating water is supplied via a single 316 stainless steel injection fitting (3/8" or 1/2" depending on shaft size). For servicing convenience, SureSeal can be paired with a Spare Seal Carrier Kit to enable lip seal replacement without uncoupling the shaft and, when applicable, in the water.
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$ 801.55
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1-2 weeks delivery time The Tides Marine SureSeal Single Injection Propeller Shaft Seal (FSK series) is a drip-free, self-aligning shaft seal kit for stainless steel propeller shafts (imperial sizes 1"–3"), supplied as a complete kit with an articulating hose and four hose clamps. The composite housing contains an integral PTFE bearing and a replaceable lip seal accessible via a removable front cap; cooling/lubricating water is supplied through a 3/8" or 1/2" 316 stainless steel injection fitting. SureSeal is easy to install, requires minimal scheduled maintenance, and can be used with Spare Seal Carrier Kits to allow lip-seal replacement without uncoupling the shaft (when carrier is fitted).
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$ 670.58
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1-2 weeks delivery time The Tides Marine SureSeal Twin Injection Propeller Shaft Seal is a drip-free, self-aligning shaft seal kit designed for twin-engine vessels, featuring dual water injection fittings to support a passive crossover line between port and starboard seals. This crossover helps maintain cooling and lubricating water flow to the seal on an idle engine (e.g., trolling or single-engine operation). The SureSeal housing is fiber-reinforced composite with an integral PTFE bearing and a replaceable lip seal accessible via a removable front cap; kits are supplied with an articulating hose and four hose clamps, and can be paired with Spare Seal Carrier Kits to allow lip-seal replacement without uncoupling the shaft.
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$ 801.55
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1-2 weeks delivery time The Hollex Marine Shaft Seal is a water-lubricated shaft sealing system for cardan shaft installations, using an axial sealing principle with a polished stainless-steel sliding ring running against a composite (carbon) counterface for a secure fit and low friction. The design allows only limited radial play, so accurate positioning near the bearing is required, and installation should account for axial motor displacement caused by propeller thrust. The system is supplied in a wide range of shaft and housing diameter combinations (examples: 25–80 mm shaft and 43–113 mm housing, depending on variant) to match different marine shaft installations.
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$ 988.89
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1-2 weeks delivery time The Exalto Vetflexseal Stern Tube Seal offers a high-quality solution for sealing marine stern tubes. Made from a durable composite material, it features a flexible bellows structure for easy installation. The seal must be positioned close to the bearing and requires manual lubrication, as it does not have an independent supply of lubrication.
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$ 648.60
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1-2 weeks delivery time The Hollex 1V and AV propeller shaft seals offer exceptional durability and performance for securing the propeller shaft. Made from high-quality bronze and designed for various shaft diameters, these seals ensure a reliable and tight fit, providing long-lasting protection against water ingress.
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$ 298.43
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1-2 weeks delivery time The Hollex Heavy Duty 2V and BV propeller shaft seals are designed for demanding marine environments, offering excellent protection against water ingress. Made from durable bronze, these seals are available in multiple diameters, ensuring a perfect fit for a wide range of propeller shafts.
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$ 571.17
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1-2 weeks delivery time The Tides Marine SureSeal Lip Seals are replacement shaft lip seals offered in imperial (3/4″ to 5″) and metric (25 mm to 125 mm) sizes. Each variant is defined by its shaft diameter, part number, and exact seal dimensions including Lip Seal ID, OD, and thickness (in inches or millimeters depending on series). This range is intended for matching the correct seal to a specific propeller shaft diameter and housing size in marine driveline applications.
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$ 123.99
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1-2 weeks delivery time The Tides Marine Spare Seal Carrier Kits are designed to store spare lip seals directly on the propeller shaft between the SureSeal® housing and the shaft coupling, allowing quick replacement of worn seals without uncoupling the shaft and, if required, without hauling the vessel out of the water. The carrier is a lightweight two-piece composite housing that clamps around the shaft and holds spare lip seals. Available in imperial sizes from 7/8″ to 6″ and metric sizes from 25 mm to 130 mm, the kits store one or two spare seals depending on shaft diameter.
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$ 310.85
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1-2 weeks delivery time The Tides Marine Hose Tee Fittings (TH series) are compact yellow brass tee connectors designed to reduce the size and complexity of branch hose connections in marine plumbing. They are an integral component of the Tides Marine water pick-up kit and are selected by matching the main hose inside diameter, branch hose diameter, and the overall part length specified for each tee.
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$ 64.61
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What are the primary functions of a propeller shaft seal in a marine vessel?
The primary functions of a propeller shaft seal in a marine vessel are to prevent water ingress and to maintain a watertight seal around the boat's propeller shaft. A dripless shaft seal, such as the PSS shaft seal by PYI, is a mechanical face seal that eliminates the maintenance and constant adjustment associated with traditional shaft seals. The PSS seal utilizes a stationary carbon flange and a stainless steel rotor to create a watertight barrier, thus preventing wear to the propeller shaft and ensuring smooth, dripless operation. Boat builders and boat yards recognize the advantages and value of installing the PSS shaft seal for its reliability and cost-effectiveness.
How does the PSS Type A shaft seal differ from other mechanical face seal?
The PSS Type A shaft seal differs from other mechanical face seals primarily due to its dripless design, which eliminates the need for constant maintenance and adjustment, significantly reducing the cost associated with traditional seals. Secured to the shaft with set screws and featuring flat surfaces between the rotating rotor and stationary carbon flange, the PSS Type A shaft seal ensures a watertight seal and compensates for most misalignment and vibration problems.
What is the primary function of a lip seal in a propeller shaft seal system?
The primary function of a lip seal in a propeller shaft seal system is to prevent water ingress and leakage around the shaft, ensuring a watertight environment. This is achieved by creating a mechanical seal around the shaft using rubber lips and o-rings that rotate with the shaft, maintaining constant pressure. PSS shaft seals are designed as dripless seals, eliminating the need for frequent maintenance and providing reliable performance in both commercial and recreational marine applications.
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