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

Osculati Brass Rubber Water Lubricated Propeller Shaft Cutless Bearings Ø20–80 mm

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

The range includes 24 configurations for metric propeller shaft diameters from 20 to 80 mm, external bearing diameters from 30 to 102 mm and overall lengths from 80 to 320 mm.

Brass External Housing

Each cutless bearing features a cylindrical brass external frame designed for installation in the corresponding stern tube or marine shaft support assembly.

The brass housing provides the outer mounting surface and supports the internal rubber bearing lining.

Hydro-Lubricating Rubber Lining

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

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

Marine Propeller Shaft Applications

These cutless bearings are designed for marine shaft line installations, where they provide support and guidance for rotating propeller shafts.

The available configurations accommodate different combinations of shaft diameter, external bearing diameter and overall length.

Metric Internal and External Diameters

All dimensions in this range are specified in millimetres. The manufacturer's dimensional drawing identifies three measurements:

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

Available Models and Dimensions

The following table lists all 24 configurations according to the Osculati technical catalogue. All dimensions are expressed in millimetres.

Available Shaft Diameters

The range includes the following metric propeller shaft diameters:

• 20, 25, 28, 30 and 32 mm.
• 35, 40, 45, 50 and 55 mm.
• 60, 65, 70 and 80 mm.

Alternative External Bearing Diameters

Several shaft diameters are available with different external bearing sizes:

• 25 mm shaft: External diameter 35 or 40 mm.
• 30 mm shaft: External diameter 40 or 45 mm.
• 35 mm shaft: External diameter 48 or 50 mm.
• 40 mm shaft: External diameter 55 or 56 mm.
• 45 mm shaft: External diameter 61 or 65 mm.
• 50 mm shaft: External diameter 66 or 70 mm.
• 55 mm shaft: External diameter 73 or 75 mm.
• 60 mm shaft: External diameter 78 or 80 mm.
• 65 mm shaft: External diameter 83 or 85 mm.
• 80 mm shaft: External diameter 100 or 102 mm.

These alternative configurations allow the bearing to be selected according to the external mounting diameter required by the stern tube installation.

Key Features

• Brand: Osculati.
• Product Type: Marine Propeller Shaft Cutless Bearing.
• External Housing: Brass.
• Internal Bearing Material: Hydro-Lubricating Rubber.
• Lubrication: Water.
• Shaft Diameter Range: 20–80 mm.
• External Diameter Range: 30–102 mm.
• Overall Length Range: 80–320 mm.
• Dimensional System: Metric.
• Available Configurations: 24.

Technical Specifications

Bearing Size Selection

Select the appropriate Osculati shaft bearing using three dimensions:

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

For shaft diameters available with multiple external bearing sizes, select the model matching the required stern tube mounting diameter. Check all three dimensions against the existing shaft installation.