Allpa Bronze Flexible Inner Shaft Bearing with Neoprene Bush for Ø25–50 mm Propeller Shafts

Name: Allpa Bronze Flexible Inner Shaft Bearing with Neoprene Bush for Ø25–50 mm Propeller Shafts
SKU: ALP 463125

SKU: ALP 463125

ID 1416501

$ 529.03

1-2 weeks delivery time

Shaft Diameter:

Stern Tube Diameter:

Allpa bronze flexible inner shaft bearing for inboard marine propulsion systems, featuring a water-lubricated neoprene bearing bush, bronze housing with internal thread for stern tube connection, rubber sealing cuff and packing cord sealing. Available for propeller shaft diameters of 25, 30, 35, 40, 45 and 50 mm, with corresponding stern tube diameters of 40, 45, 50, 55, 60 and 65 mm. Dimensions F: 135–175 mm, H: 100–140 mm, I: 52–74 mm and N: 45–80 mm, depending on the selected model.

Description
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Allpa Bronze Flexible Inner Shaft Bearing with Neoprene Bush for Ø25–50 mm Propeller Shafts

The Allpa Bronze Flexible Inner Shaft Bearing is a water-lubricated bearing and sealing assembly designed for inboard marine propeller shaft systems. It features a bronze housing, a neoprene inner bearing bush, a flexible rubber cuff and packing cord sealing.

The bronze housing is equipped with an internal thread for connection to the stern tube. The integrated neoprene bearing bush provides support for the rotating propeller shaft, while the flexible construction accommodates movement within the installation.

Six configurations are available for propeller shaft diameters from 25 to 50 mm, with corresponding stern tube connection diameters from 40 to 65 mm.

Key Features

Bronze housing: Bearing housing manufactured from bronze for marine applications.
Flexible inner bearing: Designed for inboard propeller shaft installations.
Water-lubricated neoprene bush: Integrated bearing component for the rotating propeller shaft.
Internal threaded connection: Bronze housing with internal thread for the stern tube.
Rubber sealing cuff: Flexible rubber component incorporated into the bearing assembly.
Packing cord sealing: Sealing arrangement using packing cord.
Multiple shaft sizes: Available for Ø25, Ø30, Ø35, Ø40, Ø45 and Ø50 mm propeller shafts.
Six connection configurations: Designed for corresponding Ø40–65 mm stern tube sizes.

Technical Specifications

Parameter	Specification
Brand	Allpa
Product Type	Flexible Inner Propeller Shaft Bearing
Application	Inboard Marine Propeller Shaft Systems
Housing Material	Bronze
Inner Bearing Material	Neoprene
Bearing Lubrication	Water
Housing Connection	Internal Thread for Stern Tube
Sealing Components	Rubber Cuff and Packing Cord
Propeller Shaft Diameter	Ø25–50 mm, Depending on Model
Specified Stern Tube Diameter	Ø40–65 mm, Depending on Model
Dimension F	135, 150 or 175 mm
Dimension H	100, 120 or 140 mm
Dimension I	52, 62 or 74 mm
Dimension N	45 or 80 mm
Available Configurations	6

Available Models and Dimensions

The following dimensions correspond to the F, H, I and N designations shown in the technical drawing. All dimensions are in millimetres.

Article Number	Shaft Ø	Stern Tube Ø	F	H	I	N
463125	25	40	135	100	52	45
463130	30	45	135	100	52	45
463135	35	50	150	120	62	80
463140	40	55	150	120	62	80
463145	45	60	175	140	74	80
463150	50	65	175	140	74	80

Bronze Bearing Housing

The bearing assembly uses a bronze housing with an internal threaded connection for the vessel's stern tube.

The housing incorporates the inner neoprene bearing bush and supports the flexible sealing arrangement.

Water-Lubricated Neoprene Bearing

The neoprene inner bearing bush is designed to operate with water lubrication. It provides a bearing surface for the rotating propeller shaft within the bronze housing assembly.

The technical drawing identifies a water connection on the bearing assembly.

Flexible Sealing Arrangement

The bearing assembly incorporates a rubber cuff and packing cord sealing. These components form the flexible sealing arrangement associated with the bronze inner bearing.

The combination of the flexible rubber section and integrated bearing provides a connection between the shaft sealing components and the stern tube housing.

Selection and Compatibility

Select the correct Allpa bronze flexible inner bearing according to the propeller shaft diameter and stern tube size:

463125: Ø25 mm shaft, Ø40 mm stern tube.
463130: Ø30 mm shaft, Ø45 mm stern tube.
463135: Ø35 mm shaft, Ø50 mm stern tube.
463140: Ø40 mm shaft, Ø55 mm stern tube.
463145: Ø45 mm shaft, Ø60 mm stern tube.
463150: Ø50 mm shaft, Ø65 mm stern tube.

Before ordering, verify the propeller shaft diameter, stern tube connection dimensions, internal threaded connection and installation space against the specified F, H, I and N dimensions.