# 1577G Dunbier Axle 45 Square Beam Only 1920mm(75.5") | Marine Trailer Part

🔧 Product Description

  

Dunbier Marine Products 45mm Square Solid Axle Beam Only - 1920mm - Part Number: 1577G

  

A galvanised 45mm solid square axle beam measuring 1920mm overall. It is supplied without hubs for replacement of the matching Dunbier axle where the existing hub and bearing specification is retained.

  

⚙️ Key Features

  

• Galvanised steel axle construction

• 45mm solid square section

• Non-braked configuration

• Manufactured for Dunbier trailer geometry

• Critical replacement dimensions must match the original axle

  

📏 Specifications

  

• Axle section: 45mm solid square

• Overall axle length: 1920mm / 75.5 inches

• Wheel-size guide: 13- or 14-inch

• Brake configuration: Non-braked

• Bearing family: L68110 and LM12710 cups with L68149 and LM12749 cones

• Grease seal: Dunbier 1706

• Legacy catalogue chassis-width guide: approximately 1465mm

  

🔄 Cross Reference & Related Parts

  

• Dunbier: 1577G

• Complete hubbed version: Dunbier 1576G

• Longer beam versions: Dunbier 1583G and 1589G

• Related seal: Dunbier 1706

  

🚤 Trailer Compatibility & Application

  

• Suitable for compatible Dunbier 45mm square-axle trailers

• Legacy chassis-width guide: approximately 1465mm

• Confirm spindle, spring-seat and hub-face dimensions

  

🔌 Function

  

Carries the trailer wheel loads between the suspension points and maintains the hub, wheel and brake alignment across the trailer.

  

Common signs of wear or replacement:

  

• Axle beam is bent or wheels show abnormal camber

• Corrosion, pitting or cracking is visible near spring seats or spindles

• Bearing journals are scored or undersize

• Tyres wear unevenly despite correct pressure and bearings

• Brake or hub alignment cannot be restored

  

🛠️ Installation & Safety

  

• Axle replacement is a safety-critical task for a competent trailer technician

• Measure overall length, spring-centre spacing, hub face, stud pattern and brake configuration before ordering

• Use correct U-bolts, fish plates and spring seats

• Set and lubricate wheel bearings to specification

• Verify wheel alignment, brake operation and wheel-nut torque before road use

  

📦 Condition

  

• Genuine Dunbier Marine Products part

• Brand new

• Supplied as one 1920mm axle beam without hubs

• Supplied in original or equivalent packaging

## Details

- **Price:** 326.0 AUD
- **Vendor:** Dunbier
- **Tags:** Dunbier Boat Trailers | Marine Trailer Parts & Accessories

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 326.00 AUD | In stock |

## Images

- 1577G Dunbier Axle 45 Square Beam Only 1920mm(75.5") | Marine Trailer Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/1577g-dunbier-axle-45-square-beam-only-1920mm75-5)
> Updated: 2026-08-05