Side Power Aluminum Bow Thruster Tunnel – 125mm to 300mm

Side Power Aluminum Bow Thruster Tunnel

The Side Power aluminum bow thruster tunnel is available in multiple diameter and length configurations for compatible Side Power thruster installations. The product page provides selectable Diameter and Length attributes, while wall thickness, part number and compatible thruster models vary according to the specific tunnel configuration.

Selecting the correct tunnel requires more than choosing an approximate size. The inner diameter must correspond to the thruster installation, while the required tunnel length depends on the vessel and installation requirements.

Available Diameter and Length Selections

The product page provides the following selectable attributes:

These selectors identify the available product attributes. Refer to the configuration specifications below to confirm the documented dimensions, wall thickness, part number and compatible thruster models.

Tunnel Specifications and Compatibility

How to Select the Correct Bow Thruster Tunnel

Start with the thruster model and required inner diameter, rather than selecting the tunnel only by its length.

The documented configurations associate different Side Power thruster families with specific tunnel diameters. For example:

• 125 mm: SE30 / SE40
• 190 mm: SE60 / SE80 Series
• 220 mm: SE120 / SE150 / SH160
• 250 mm: SE130 / SE170 / SE210 / SH240
• 300 mm: SE200 / SE220 / SE240 / SE285 / SH320–400

Once the required diameter has been identified, confirm the appropriate tunnel length and corresponding part number for the installation.

Diameter, Length and Wall Thickness

Diameter and length are not the only specifications that change between tunnel configurations. Wall thickness also varies by size.

The documented configurations include:

• 125 mm: 5.0 mm wall thickness
• 190 mm: 5.0 mm wall thickness
• 220 mm: 10.0 mm wall thickness
• 250 mm: 7.0 mm wall thickness
• 300 mm: 10.0 mm wall thickness

For this reason, use the complete dimensional specification and Side Power part number when identifying a tunnel rather than relying on diameter alone.

Replacement or New Installation

The correct tunnel selection depends on whether you are replacing an existing tunnel or preparing a new thruster installation.

For a replacement:

1. Identify the existing Side Power thruster model.
2. Confirm the tunnel’s inner diameter.
3. Measure or verify the required tunnel length.
4. Check the specified wall thickness.
5. Match these specifications to the corresponding Side Power part number in the table above.
6. Do not order based on diameter alone if the length, wall thickness or part number does not match the required configuration.

For a new installation:

1. Determine the appropriate thruster model for the vessel.
2. Identify the tunnel diameter required by that thruster.
3. Determine the tunnel length required for the vessel’s installation.
4. Use the specification table to identify the corresponding wall thickness and part number.
5. Confirm the complete tunnel configuration before ordering or beginning installation.

If you have not yet selected the thruster itself, explore our Bow Thrusters range first. You can also review How a Bow Thruster Works to understand the role of the tunnel within the system and use What Size Bow Thruster Do I Need? to evaluate thruster sizing before selecting the corresponding tunnel.