50mm High Shoulder Tow Ball is a high tensile tow ball. Suits Al-ko, Ark and Hyland Hitch off-road couplings
- 25mm Shoulder.
- 52mm or 62mm Thread length.
- 22mm UNF Diameter thread to suit most tow bars.
- High tensile
The high shoulder allows great articulation of off road couplings over standard tow balls.
Overseas manufacturing in China and other places, it is unusual to find Australian made goods. I am so proud we can manufacture these tow balls for you.
In our opinion, these high tensile tow balls are the best on the market and a great investment.
Standard tow balls can touch and put a lot of force on the edge of the receiver bar and may cause coupling, tow ball and chassis damage.
Standard high shoulder and stainless high shoulder tow balls are also available using the drop down menu.
No doubt you have noticed the price differences in high shoulder tow balls.
For the 3,500kg and a true rating performance, we use high tensile steel and this is where these tow balls become costly.
Couplemate tow balls are guaranteed for life. If your Couplemate high tensile tow ball fails you for any reason, we will replace it.
3500kg high shoulder tow balls are manufactured in Australian by Couplemate. Thank you for your support.
A standard shank tow ball has a shoulder of approximately 12.5mm. This size shank fits all highway couplings except some off-road couplings.
The Al-ko, Ark and Hyland off-road couplings foul the tow bar tongue when towing through gullies or river beds on an angle. There is a possibility damage that could be caused to your towing equipment using a normal size shoulder on a tow ball.
Standard high shoulder tow balls are rated at only 2000kg due to the extra forces that are impacted when the height is raised.
Couplemate developed a high tensile tow ball to allow the full rating of 3500kg to be issued to this tow ball. In fact, a much higher rating is achievable due to the grade of high tensile we used.
Galvanising and Plating
Galvanising and plating is a big issue when talking about “but will it be strong enough”
There has been a fair amount of research on galvanising and spring weakness due to the galvanising process. Click here for the full report.
So will galvanising or plating affect my product strength?
Yes, strength tests in the full test report above states strength reduce the product rating by 0.4%, The tolerance here we would take notice is 1%.
In effect, there is no negligible effect on product load rating. Click this link to read our article on galvanising.
How can I be sure my this tow ball rating will not be affected by galvanising?
A Good question deserves a good answer.
Couplemate tow balls are tested to AS 4177.2—2004, here is the link for you to check.
Also required as part of testing is a certificate that the tow ball has undergone a de-embrittlement process. So you have read about embrittlement right? Well, we have a certificate to ensure our tow balls are free of hydrogen embrittlement.
50mm High Shoulder Tow Ball