Osculati Resin Rubber Water Lubricated Propeller Shaft Cutless Bearings – Metric Sizes

Osculati Resin Rubber Water Lubricated Propeller Shaft Cutless Bearings Ø25–50 mm

Osculati Resin Rubber Water Lubricated Propeller Shaft Cutless Bearings are designed for supporting and guiding rotating propeller shafts in marine propulsion systems. Each bearing combines a cylindrical resin outer housing with an internal hydro-lubricating rubber lining.

The 52.209 series includes 12 dimensional configurations with metric propeller shaft diameters from 25 to 50 mm, external bearing diameters from 35 to 70 mm and overall lengths from 100 to 200 mm.

Resin External Housing

Each bearing features a resin outer frame that provides the external mounting surface for installation in a corresponding stern tube or shaft support assembly.

The resin housing surrounds the rubber bearing lining and provides a non-metallic outer structure.

Hydro-Lubricating Rubber Lining

The internal bearing surface is manufactured from hydro-lubricating rubber, designed to support the rotating propeller shaft in a water-lubricated marine propulsion system.

Water lubrication helps reduce friction between the shaft and bearing surface during operation.

Marine Propeller Shaft Applications

The bearings are intended for marine shaft line installations where support and guidance of the rotating propeller shaft are required.

The available configurations allow selection according to the shaft diameter and external mounting dimensions of the shaft support assembly.

Metric Internal and External Diameters

Both internal and external diameters are specified in millimetres. The manufacturer's technical drawing identifies three dimensions:

• Ø A – Shaft Diameter: Internal bearing diameter corresponding to the propeller shaft.
• Ø B – External Diameter: Outside diameter of the resin housing.
• C – Length: Overall bearing length.

Available Models and Dimensions

The following table lists all 12 configurations according to the Osculati technical catalogue. All dimensions are expressed in millimetres.

Alternative External Bearing Diameters

Each shaft diameter is available with two external bearing sizes:

• 25 mm shaft: External diameter 35 or 40 mm; length 100 mm.
• 30 mm shaft: External diameter 40 or 45 mm; length 120 mm.
• 35 mm shaft: External diameter 48 or 50 mm; length 160 mm.
• 40 mm shaft: External diameter 55 or 56 mm; length 160 mm.
• 45 mm shaft: External diameter 61 or 65 mm; length 180 mm.
• 50 mm shaft: External diameter 66 or 70 mm; length 200 mm.

These alternative external diameters allow selection according to the required mounting dimensions of the existing stern tube or shaft support.

Key Features

• Brand: Osculati.
• Series: 52.209.
• Product Type: Marine Propeller Shaft Cutless Bearing.
• External Housing Material: Resin.
• Internal Bearing Material: Hydro-Lubricating Rubber.
• Lubrication: Water.
• Shaft Diameter Range: 25–50 mm.
• External Diameter Range: 35–70 mm.
• Overall Length Range: 100–200 mm.
• Dimensional System: Metric.
• Available Configurations: 12.

Technical Specifications

Bearing Size Selection

Select the appropriate Osculati resin shell cutless bearing using three dimensions:

• Shaft (A): Internal bearing diameter corresponding to the propeller shaft, in millimetres.
• Shaft Tube (B): External diameter of the bearing housing, in millimetres.
• Length (C): Overall bearing length, in millimetres.

Each shaft diameter has two alternative external bearing diameters. Select the combination that matches the propeller shaft and the mounting dimensions of the existing stern tube or shaft support assembly.