39mm Round Stub Axle
$26.00 – $55.00
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39mm Round Stub Axle, Castellated Nut, washer and split pin
39mm round stub axle is used on small trailers and as spare wheel carriers on boat trailers. We understand how to make a lousy axle and know what makes an axle great. Poorly turned axles cause bearing failure.
The axle rating is 375kg each or 750kg per pair.
Hollow Axles
Hollow axles are rated the same as solid solids up to 750kg. American imported trailers have hollow axles.
How to install a stub into a hollow tube
- Cut the tube to length, including the stub measurement.
- Drill a hole no smaller than 12mm on all four sides. Mark the 45mm tube 25mm back from the end of the stub when inserted.
- Insert the stub weld into place.
- Weld the stub holes to secure the end of the stub into the tube.
- Finally, the hollow axle stub must protrude past the springs and u-bolts once affixed into position.
Standard Bearing Sizes are
| Inner LM Bearing Sizes | ID 31.75mm | OD 59.10mm |
| Outer LM Bearing Sizes | ID 19.05mm | OD 45.20mm |
| LM Seal | ID 37.5mm | OD 59.10mm |
| Dust Cap | 45.20mm |
We recommend you use only Japanese Bearings.
A 50mm round tube with a wall thickness of 5mm retains the 750kg rating of a pair of 39mm round stubs.
Reduce axle flex with a shorter length axle or more oversized diameter axle.
If your camper, caravan or trailer is around 2400mm in length, select a 45mm Square Axle for a rating around the 1500kg mark.
Purchase Spare Wheel Carriers here.
Click here to understand Axles and various types of well-manufactured and bad axles.
Review a variety of stub axle specifications here.
Purchase a combination of stub axles we manufacture here
Our Service Lifetime Warranty
Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.
Couplemate™ is a manufacturer and vendor of high-quality towing, trailer, and caravan components. Couplemate™ Core Goods and Custom Work are guaranteed to be free of defects for the service lifetime of the product when used as intended.
Warranties are non-transferrable and Couplemate™ requires satisfactory proof of purchase prior to issuing a remedy. The full Couplemate™ Warranty Policy can be found in the Terms & Conditions: Section 8 – Consumer Guarantees & Warranty.
Warranties are in addition to your rights under the Australian Consumer Law. If something is wrong with your order, please contact our team.
60-Day Returns
After 60 years of experience, we know that life has its unpredictable moments.
All Couplemate™ orders (online, over the phone, or in-store) have a 60 day period for change-of-mind returns and exchanges. There are some items that can’t be returned and some returns may incur a 15% restocking fee.
You can view our full policy for change-of-mind returns here.
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