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Main-Catalog-Boat Mechanics & Marine Systems-Propeller Shaft & Stern Gear-Osculati Brass Rubber Water Lubricated Propeller Shaft Cutless Bearings – Imperial Sizes

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

Name: Osculati Brass Rubber Water Lubricated Propeller Shaft Cutless Bearings – Imperial Sizes
SKU: Osculati-52.306.00

SKU: Osculati-52.306.00

ID 1415087

$ 109.05

1-2 weeks delivery time

Shaft Diameter:

1"
1 1/8"
1 1/4"
1 3/8"
1 1/2"
1 5/8"
1 3/4"
2"
2 1/4"
2 1/2"
2 3/4"
3"
1 7/8"
2 5/8"

Stern Tube Diameter:

1 1/2"
1 1/4"
1 3/4"
1 5/8"
1 7/8"
2 1/8"
2 3/8"
2 5/8"
2"
3 1/4"
3 3/4"
3 3/8"
3"
4"

Length, mm:

101.6
114.7
127
139.70
152.4
165.10
177.80
190.5
203.20
228.60
240
266.70
279.40
304.80

Osculati Imperial Brass Rubber Water Lubricated Propeller Shaft Cutless Bearings are designed to support and guide rotating propeller shafts in marine stern tube installations. Featuring a brass external housing with a hydro-lubricating rubber lining, these bearings are suitable for imperial shaft arrangements used on US, UK and Australian boats. The range includes 15 configurations with shaft diameters from 1" to 3" (25.40–76.20 mm), external bearing diameters from 1 1/4" to 4" (31.75–101.60 mm) and overall lengths from 101.6 to 304.8 mm. Internal and external diameters are specified in inches, with corresponding metric dimensions provided for reference. Select the required bearing according to shaft diameter, external mounting diameter and overall length.

Description
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Osculati Imperial Brass Rubber Water Lubricated Propeller Shaft Cutless Bearings 1"–3"

Osculati Imperial Brass Rubber Water Lubricated Propeller Shaft Cutless Bearings are designed for supporting and guiding rotating propeller shafts in marine propulsion installations. The bearings feature a brass external housing and an internal hydro-lubricating rubber lining.

This imperial range includes 15 configurations for propeller shaft diameters from 1" to 3", external bearing diameters from 1 1/4" to 4" and overall lengths from 101.6 to 304.8 mm. The bearings are suitable for shaft line installations on US, UK and Australian boats.

Brass External Housing

Each bearing features a cylindrical brass external frame that forms the supporting structure for installation in the corresponding stern tube or marine shaft support assembly.

The brass housing provides the external mounting surface and surrounds the internal rubber bearing lining.

Hydro-Lubricating Rubber Lining

The internal bearing surface is manufactured from hydro-lubricating rubber, designed to support rotating propeller shafts in water-lubricated marine propulsion systems.

The rubber lining provides the shaft contact surface, while water lubrication supports shaft rotation and helps reduce friction during operation.

Imperial Shaft Line Applications

This Osculati bearing series is suitable for marine shaft arrangements using imperial internal and external diameters, including installations on boats from the United States, United Kingdom and Australia.

The manufacturer's catalogue provides the nominal diameters in inches alongside their corresponding metric dimensions.

Bearing Dimensions

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 15 configurations according to the Osculati technical catalogue.

Osculati Code	Shaft Ø A (inch)	Shaft Ø A (mm)	External Ø B (inch)	External Ø B (mm)	Length C (mm)
52.306.00	1"	25.40	1 1/4"	31.75	101.6
52.306.01	1"	25.40	1 1/2"	38.10	101.6
52.306.02	1 1/4"	31.75	1 3/4"	44.45	127
52.306.03	1 1/2"	38.10	2"	50.80	152.4
52.306.04	1 3/4"	44.45	2 3/8"	60.32	177.8
52.306.05	2"	50.80	2 5/8"	66.67	203.2
52.306.21	1 1/8"	28.57	1 5/8"	41.27	114.7
52.306.22	1 3/8"	34.92	1 7/8"	47.62	139.7
52.306.23	1 5/8"	41.27	2 1/8"	53.97	165.1
52.306.24	1 7/8"	47.62	2 5/8"	66.67	190.5
52.306.06	2 1/4"	57.15	3"	76.20	228.6
52.306.08	2 1/2"	63.50	3 1/4"	82.55	240
52.306.09	2 5/8"	66.67	3 3/8"	85.72	266.7
52.306.10	2 3/4"	69.85	3 3/4"	95.25	279.4
52.306.12	3"	76.20	4"	101.60	304.8

Alternative External Bearing Diameters

For a 1" propeller shaft, two external bearing diameters are available:

Osculati 52.306.00: Shaft 1", external diameter 1 1/4", length 101.6 mm.
Osculati 52.306.01: Shaft 1", external diameter 1 1/2", length 101.6 mm.

These configurations provide alternative external mounting dimensions for the same nominal shaft diameter.

Key Features

Brand: Osculati.
Product Type: Marine Propeller Shaft Cutless Bearing.
External Housing Material: Brass.
Internal Bearing Material: Hydro-Lubricating Rubber.
Lubrication: Water.
Dimensional System: Imperial Internal and External Diameters.
Shaft Diameter Range: 1"–3" (25.40–76.20 mm).
External Diameter Range: 1 1/4"–4" (31.75–101.60 mm).
Overall Length Range: 101.6–304.8 mm.
Applications: Marine Shaft Lines, including US, UK and Australian Boats.
Available Configurations: 15.

Technical Specifications

Manufacturer	Osculati
Product Type	Stern Tube Cutless Bearing
External Frame Material	Brass
Internal Lining Material	Hydro-Lubricating Rubber
Lubrication Type	Water Lubricated
Internal Diameter Ø A	1"–3"
External Diameter Ø B	1 1/4"–4"
Overall Length C	101.6–304.8 mm
Number of Variants	15

Bearing Size Selection

Select the appropriate Osculati imperial shaft bearing according to three dimensions:

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

Use the complete dimensional combination to select the correct bearing for the existing marine shaft and stern tube installation.