SKU:
Osculati-52.331.25
ID
1415157
$ 85.81
1-2 weeks delivery time
Shaft Diameter:
- 25
- 30
- 35
- 40
- 45
- 50
Osculati Rubber Propeller Shaft Seal Version B is designed to protect marine propeller shaft installations against water seepage. Manufactured from a special rubber compound resistant to salt water and lubricating grease, the seal provides a low-maintenance shaft sealing solution when correctly maintained. Unlike Version A, Version B does not feature an external water hose adaptor or a greasing aperture. The 52.331 series includes six metric configurations for propeller shaft diameters of 25, 30, 35, 40, 45 and 50 mm, with corresponding stuffing box case diameters from 43 to 70 mm. The seal is normally lubricated and cooled by water when operating below the waterline; operation at or above the waterline requires an external cooling water source. Each kit includes the rubber stuffing box, an AISI 316 stainless steel clamp, a tube of specific shaft line lubricant and installation instructions.
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Osculati Rubber Propeller Shaft Seal Version B Ø25–50 mm
Osculati Rubber Propeller Shaft Seal Version B is designed for sealing marine propeller shaft installations and providing protection against water seepage. Manufactured from a special rubber compound resistant to salt water and lubricating grease, this stuffing box seal provides a compact sealing arrangement for marine propulsion shaft systems.
The Osculati 52.331 series includes six metric configurations for propeller shaft diameters from 25 to 50 mm, with stuffing box case diameters from 43 to 70 mm.
Version B – Standard Rubber Stuffing Box
Version B features a rubber sealing body without an external water hose adaptor or greasing aperture.
This configuration differs from Osculati Version A (52.330 series), which incorporates a brass hose adaptor for external water lubrication and a separate greasing aperture with a brass cap.
Saltwater and Grease-Resistant Rubber
The stuffing box is manufactured from a special type of rubber resistant to salt water and lubricating grease.
The manufacturer specifies long-lasting protection against water seepage and low maintenance requirements when the seal is correctly treated.
Water Lubrication and Cooling
The stuffing box normally operates below the waterline, where lubrication and cooling are provided by water.
For installations operating at or above the waterline, the manufacturer specifies that an external cooling water source is required.
AISI 316 Stainless Steel Clamp
The product is supplied with an AISI 316 stainless steel clamp for securing the stuffing box within the corresponding shaft installation.
Complete Installation Kit
Each Osculati Version B kit includes:
- Rubber propeller shaft stuffing box.
- AISI 316 stainless steel clamp.
- Tube of specific shaft line lubricant.
- Installation instructions.
Available Models and Dimensions
The following table lists the six metric Version B configurations according to the Osculati technical catalogue. All dimensions are expressed in millimetres.
Osculati Code Shaft Diameter (mm) Stuffing Box Case Ø (mm) 52.331.25 25 43 52.331.30 30 49 52.331.35 35 55 52.331.40 40 60 52.331.45 45 65 52.331.50 50 70
Key Features
- Brand: Osculati.
- Series: 52.331.
- Version: B.
- Product Type: Rubber Propeller Shaft Seal.
- Sealing Material: Saltwater and Grease-Resistant Rubber.
- Clamp Material: AISI 316 Stainless Steel.
- External Water Hose Adaptor: Not Included.
- Greasing Aperture: Not Provided.
- Lubrication and Cooling: Water.
- Shaft Diameter Range: 25–50 mm.
- Stuffing Box Case Diameter: 43–70 mm.
- Available Configurations: 6.
Technical Specifications
Manufacturer Osculati Product Type Marine Rubber Stuffing Box Series 52.331 Version B Sealing Material Saltwater and Grease-Resistant Rubber Clamp Material AISI 316 Stainless Steel External Water Connection Not Provided Greasing Aperture Not Provided Lubrication and Cooling Water Shaft Diameter 25 / 30 / 35 / 40 / 45 / 50 mm Stuffing Box Case Diameter 43–70 mm Included Accessories AISI 316 Stainless Steel Clamp, Shaft Lubricant and Instructions Available Variants 6
Installation and Operating Conditions
The stuffing box is normally installed below the waterline and uses water for lubrication and cooling.
If the stuffing box operates at or above the waterline, an external cooling water source is required according to the manufacturer's instructions.
Correct installation and maintenance are important for maintaining the sealing performance of the rubber stuffing box.
Shaft Seal Selection
Select the appropriate Osculati Version B seal according to the propeller shaft diameter:
- 25 mm shaft: 43 mm stuffing box case diameter.
- 30 mm shaft: 49 mm stuffing box case diameter.
- 35 mm shaft: 55 mm stuffing box case diameter.
- 40 mm shaft: 60 mm stuffing box case diameter.
- 45 mm shaft: 65 mm stuffing box case diameter.
- 50 mm shaft: 70 mm stuffing box case diameter.
Check the shaft diameter and corresponding stuffing box case diameter against the existing marine shaft installation before ordering.
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