Couplemate Trailer Parts
Couplemate Trailer Parts

50mm Round Axle

$169.76$232.30 inc GST

or 4 fortnightly payments from $42.44 with Afterpay More info

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550mm Round Axle is made in Australia and rated to a maximum of 1600kg

The 50mm Round Axle may be perfect for your trailer, caravan or camper.

If you are towing your rig straight and true, perfect if not then below are a few tips.

Note: Please advise tip to tip length and axle profile. Example 2t, 3t, parallel, slimline.

Couplemate manufacturers axles from Bluescope steel in our Wynnum, Brisbane workshops.

Note: Please advise tip to tip length or face to face measurement and axle profile after ordering. Example 2t, 3t, parallel, slimline.

How to measure tip to tip length.

  • Ford – Add 100mm to face to face length
  • Holden – Add 100mm to face to face length
  • Parallel – Add 117mm to face to face length
  • 2t – Add 170mm to face to face length.

50mm round axles are rated as follows

  • Slimline 1450kg
  • Parallel 1600kg
  • 2 tonne
  • 3 tonne depending on length and bearing configuration.

If you are towing your rig straight and true, perfect if not then below are a few tips.

50mm around axles rarely causes problems.

50mm Round Axle can vary greatly in price. Axles are manufactured in a variety of places, India, China, Malaysia, Australia.

Real problems may come from imported steel causing steel fractures along the beam and in.a consistent hardness of the beam.

Other common problems and tips:

  1. Rough seal journals can cause a loss of grease through the rear seal.
  2. 50mm round axles must be examined prior to installation for cracks in the steel along the axle.
  3. Some suppliers supply non-virgin steel or scrap steel and forge this steel into solid square or round shape for axle production. Always ask for Australian Steel.
  4. Chinese bearings are the second biggest cause of axle failure.
  5. If your plan to get onto a highway, use Japanese bearings.
  6. The combination of Japanese Bearings and 50mm Square Axle will help you greatly with lower maintenance for your rig.
  7. Are your tandem tyres wearing unevenly? Here is a link that provides an easy method to test your axles.
  8. Axle Steel explained


We rarely have problems with these larger kits.

A Couplemate assembled axle with Japanese gives you our unconditional guarantee of a well made, well-backed axle assembly.

At Couplemate, we can help you out with all the boat trailer parts you’ll need. We supply Australian-made axles for caravans (made at our Wynnum workshops), galvanised marine axles for boat trailers, and drop and overlay axles and stub axles made from Western Australian iron ore.

Additional information

Weight 60 kg
Dimensions 200 × 5 × 5 cm
Tip to Tip Measurement

1500mm, 1525mm, 1550mm, 1575mm, 1600mm, 1625mm, 1650mm, 1675mm, 1700mm, 1725mm, 1750mm, 1775mm, 1800mm, 1825mm, 1850mm, 1875mm, 1900mm, 1925mm, 1950mm, 1975mm, 2000mm, 2025mm, 2050mm, 2075mm, 2100mm, 2125mm, 2150mm, 2175mm, 2200mm, 2225mm, 2250mm, 2275mm, 2300mm, 2325mm, 2350mm, 2375mm, 2400mm, 2425mm, 2450mm, 2475mm

2 reviews for 50mm Round Axle

  1. David Urquhart

    David Urquhart

    Are those axles solid or hollow? If hollow, what’s the wall thickness?

  2. Ralph Mounfield

    Ralph Mounfield

    Solid blank turned ends David Urquhart.

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