70mm Tow Ball (32mm Shank)

Australian-made chrome 70mm Tow Ball

In recent years, our team has observed that an increasing number of Australian trailers are equipped with 70mm tow balls.

Traditionally, the most common drawbar coupling was the 50mm type AL-KO electric coupling. However, many new trailers and caravans now feature a a href=”https://www.couplemate.com.au/towing-and-connections/hitches-and-couplings/light-couplings-max-4500kg-atm/4-5t-electric-trailer-coupling-d-value-23-24kn/”>70mm ball coupling due to the increased demand for higher weight ratings.

Standards for towing equipment depend on the intended ATM (Average Towing Mass). In short, an increase in ATM equals an increase in standards.

As a Queensland-based manufacturer, we value that all Couplemate™ components meet and exceed these quality standards. Given the increase in heavier vehicles and ATMs on Australian roads, this matters more now than ever.

Shank Specifications

• Diameter: 32mm (1-1/4″)
• Length: 72mm
• Thread Length: 50mm
• Threads per Inch: 12

4.5t ATM Towing Compliance

Our 70mm ball is compliant with:

• Australian Standards (4177)
• ADR 62/02 (Mechanical Connections between Vehicles).

Component Type Approval: CTA-045125

Components supplied with a CTA number guarantee that it has been tested to the relevant standards. Moreover, it ensures that a consistently safe product will be supplied (source).

Our team can provide a printed copy of the CTA letter with your order upon request. Alternatively, the digital version is available here: CM296 70mm Tow Ball Approval Letter.

High Tensile 70mm Tow Ball

The Couplemate™ Core Range ensures strength and safety through solid engineering, and our 70mm ball is no exception.

• Rating: 4500kg maximum ATM
• D-Value: 23.2kN
• Torque Setting: 1109Nm

View product documentation online: Couplemate 70mm Tow Ball Specifications

Made from High-Quality Steel

Our internal engineers and production team quality check all manufacturing materials.

The Couplemate 70mm tow ball is manufactured from Grade 4140 high-tensile steel.

As an engineering steel, 4140 is universally known for its strength and robust composition. Given Australia’s harsh towing conditions, 4140 steel provides the necessary mechanical properties to ensure stability and security.