39 round axle

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39mm RND Axle
Price range: $169.00 through $186.00 Inc.GST
39mm RND Axle quantity
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39mm Round Trailer Axle

The 39mm Round Trailer Axle is an industry-standard benchmark for light-duty box trailers, boat trailers, and lightweight camper configurations across Australia. Machined from high-grade solid black steel round bar, this axle profile balances dependable strength with cost-effective reliability, engineered to prevent torsional stress and wheel misalignment during everyday towing.

Key Structural Advantages

Choosing a precision-machined 39mm round solid axle assembly ensures optimal setup safety:

Solid Steel Bar Stock: Constructed from solid round steel bar rather than hollow tube to completely prevent structural bending.
Standard Profiles: Natively accommodates standard Holden LM bearing configurations for easy maintenance.
Flexible Configurations: Integrates smoothly with both unbraked hub kits and basic trailer braking installations.
Australian Standards: Precision-turned spindle ends guarantee standard hub face alignments and tracking.

Frequently Asked Questions (FAQ)

What is the maximum weight capacity of a 39mm round axle?

A standard solid 39mm round axle is rated for a maximum carrying capacity of 750kg when configured with standard Holden LM series bearings in a single-axle setup.

Can I use a 39mm round axle on a braked trailer?

Yes. While popular for unbraked 750kg trailers, a 39mm round axle can be fitted with mechanical or hydraulic components if required, provided the gross trailer mass does not breach the structural rating limits.

How do I know if I have a 39mm round axle or a 40mm square axle?

A 39mm round axle uses a fully cylindrical bar between the springs, whereas a square axle has flat edges. You can verify the exact diameter using a digital vernier caliper on the unmachined center section of the bar.