70mm Tow Ball and Drop Tow Hitch Receiver

SKU: Receiver-523-TB Category: Towbar Hitch Receivers Tags: Australian Made, Couplemate™ Core, Hayman Reese, huntsman, mister hitches, Tag Brand: Couplemate

70Mm Tow Ball And Drop Tow Hitch Receiver

CM523 Engineering Drawing

CM524 Engineering Drawing

Price

$249.00 Inc.GST

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70mm Tow Ball and Receiver Hitch Receiver | 4500kg

A tow bar receiver hitch kit is a set of components that allows you to attach your trailer or caravan to your tow vehicle.

Couplemate™ 70mm Tow Ball Tow Hitch Receivers are made from Solid Cast Iron in Sydney. Because of their robust material, Genuine Couplemate™ trailer hitches guarantee a strong connection between your trailer and tow vehicle.

Over time, cast steel products are superior to fabricated/welded products. Welded ball mounts and hollow receivers can distort under off-road conditions and during highway shock-loading events. When inverted, hollow hitches are more susceptible to deformation.

For added versatility, it can also be used with the Cruisemaster DO45 tow pin.

You can trust the quality and durability of our 70mm receiver hitches, which are expertly cast, machined, and tested right here in Australia.

2-inch drop and 4-inch Drop 70mm Towbar Receiver Product Specifications

Material: Cast Ductile Iron (500/7)
Maximum Capacity: 4.5t
Shank hole: 32mm
Does not come with a 70mm tow ball.

This product also suits the shank size for 2 5/16″ Tow Balls (American size).

How can I insert a 50mm tow ball?

Towing Disaster: 4.5t on a 3.5t Receiver

You can use a Tow Ball Reducer Bush to take a 4.5t receiver to a 3t receiver. However, you cannot go the opposite way.

The right image shows a well-known heavy-duty tow ball mount or tow bar tongue rated at 3.5t.

However, a welder has used an oxy-torch to enlarge the hole to 32mm to fit a 4.5 t tow ball.

The image on the right is a well-known heavy-duty tow ball mount or towbar tongue.

Review Related Products

70mm Tow Ball and Drop Tow Hitch Receiver Guide

Ensure safe, heavy-duty towing and comply with transport regulations by following these critical alignment and installation guidelines.

✔️ The Do’s

Match capacity ratings: Ensure your tow bar, safety chains, and vehicle tow rating match or exceed the heavy-duty capacity of the 70mm ball (typically rated up to 4.5T).
Torque the ball nut: Tighten the massive 70mm tow ball shank nut to the exact high-torque specification using a heavy-duty wrench or breaker bar.
Use a locking pin: Always secure the drop hitch receiver into the vehicle’s hitch main box using a rated hitch pin and a reliable R-clip or padlock.
Level the trailer: Adjust the drop or rise position of the hitch section so your dual-axle or heavy trailer sits perfectly level when hitched up.
Apply light lubrication: Smear a thin layer of high-pressure multi-purpose grease onto the 70mm ball surface to reduce friction wear inside the coupling.

❌ The Don’ts

Don’t mix ball sizes: Never attempt to couple a standard 50mm or 2-inch trailer coupling onto a 70mm tow ball; it will not fit or lock safely.
Don’t exceed drop ratings: Avoid using inverted drop hitches beyond their certified inverted weight limits, as leverage forces increase significantly.
Don’t modify or weld: Never drill extra pin holes, weld, or otherwise alter the structural steel drop shank plate, as this voids its ADR compliance.
Don’t leave hitch rattling: Avoid driving with a loose receiver shank; use an anti-rattle shim or clamping bolt to prevent premature wear on the hitch box.
Don’t ignore shank wear: Never tow if you notice flat spots, cracking, or severe necking on the 70mm ball sphere or mounting shank thread.

Additional information

Weight	13 kg
Dimensions	40 × 20 × 10 cm

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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