Vetus BG GRP Fiberglass Stern Tube with Aft Cutlass Bearing Ø25–40 mm

Name: Vetus BG GRP Fiberglass Stern Tube with Aft Cutlass Bearing Ø25–40 mm
SKU: Vetus BG25/0500

SKU: Vetus BG25/0500

ID 1415454

$ 127.29

1-2 weeks delivery time

Diameter, mm:

Length, mm:

500
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Vetus BG GRP (polyester) stern tubes are designed for water-lubricated marine propeller shaft systems. Each tube features an outer Cutlass bearing at the propeller end and is installed by bonding directly into the hull. Available for shaft diameters of 25, 30, 35 and 40 mm, with four stern tube length options for each size.

Description
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Vetus BG GRP Fiberglass Stern Tube with Aft Cutlass Bearing Ø25–40 mm

The Vetus BG GRP Fiberglass Stern Tube is designed for water-lubricated marine propeller shaft installations. Manufactured from glass-reinforced polyester (GRP), the stern tube is intended to be bonded directly into the vessel's hull.

Each BG stern tube is equipped with an aft Cutlass bearing at the propeller end to support the propeller shaft. The series is available for shaft diameters from 25 to 40 mm, with different lengths to accommodate various stern gear installations.

Key Features

GRP construction: Glass-reinforced polyester stern tube.
Water-lubricated design: Suitable for marine propulsion shaft systems using water lubrication.
Aft Cutlass bearing: Outer bearing positioned at the propeller end of the stern tube.
Hull installation: The stern tube must be bonded directly into the hull.
Available shaft diameters: 25, 30, 35 and 40 mm.
Multiple tube lengths: Four available length configurations for each shaft diameter.
Additional bearing support: Forward and intermediate bearing options are available for stern gear arrangements requiring additional shaft support.

Technical Specifications

Parameter	Specification
Manufacturer	Vetus
Product Series	BG
Product Type	GRP Stern Tube with Aft Cutlass Bearing
Material	Glass-Reinforced Polyester (GRP)
Lubrication	Water-Lubricated Stern Gear
Bearing Configuration	One Aft Cutlass Bearing
Installation	Bonded Directly into the Hull
Shaft Diameter Range	25–40 mm
Available Shaft Diameters	25, 30, 35 and 40 mm

Available Models and Dimensions

All dimensions are in millimetres.

Model	Shaft Ø D	Stern Tube Length B	K (min.)	Outer Ø Q
BG25	25	581.5 / 1081.5 / 1581.5 / 2081.5	8	44
BG30	30	595.5 / 1095.5 / 1595.5 / 2095.5	10	50
BG35	35	595.5 / 1095.5 / 1595.5 / 2095.5	10	57
BG40	40	581.5 / 1081.5 / 1581.5 / 2081.5	12	62

Additional Stern Gear Installation Dimensions

Model	Shaft Ø D	J	Outer Ø Q	W	C (min.)
BG25	25	40	44	112	127
BG30	30	57	50	112	172
BG35	35	54	57	112	184
BG40	40	64	62	114	214

Construction and Installation

The Vetus BG stern tube is installed by bonding the GRP tube directly into the hull. An aft Cutlass bearing is positioned at the propeller end of the tube.

The complete stern gear arrangement can include:

Propeller shaft
GRP stern tube with aft Cutlass bearing
Inner bearing and shaft sealing assembly

The propeller shaft and inner bearing are separate components of the stern gear installation.

Additional Bearing Support

Depending on the propeller shaft length, diameter and rotational speed (RPM), an installation may require one, two or three Cutlass bearings.

Additional bearing options include:

Shaft Diameter	Forward Bearing	Intermediate Bearing
25 mm	BR225	BR325
30 mm	BR230	BR330
35 mm	BR235	BR335
40 mm	BR240	BR340

Selection and Installation Requirements

Select the appropriate Vetus BG stern tube according to the propeller shaft diameter (D) and the required stern tube length (B).

The outer tube diameter (Q), minimum installation dimension (K) and available hull installation space must also be considered.

The stern tube must be bonded directly into the hull. Additional Cutlass bearings may be required depending on the shaft length, diameter and operating RPM.