Choosing the Right Hammerlock and Hook Size for Your Trailer

It is important to know how to choose the right hammerlock and hook size, as making the wrong choice can lead to serious consequences. Here is a quick guide to help you make the right choice.

Minimum Breaking Force

The first thing to consider when choosing your hammerlock and hook size is the minimum breaking force. This should be at least 1.5 times the ATM (Aggregate Trailer Mass) of your trailer. For example, if your trailer has an ATM of 1000kg, then the minimum breaking force should be 1500kg.

Choosing the Right Size

Once you know the minimum breaking force, you can choose the right size for your hammerlock and hook. For a trailer with an ATM of 1000kg, a 6mm hammerlock and hook with a breaking force of 4480kg would be suitable because 4480kg is greater than 1.5x the ATM of 1500kg.

If your trailer has an ATM of 3000kg, then the minimum breaking force should be 4500kg. A 7/8mm hammerlock and hook with a breaking force of 8000kg would be appropriate in this case.

Weakest Link

It's important to remember that the minimum breaking strength of the entire setup is determined by the weakest link. For example, if you have a 7/8mm hammerlock and a 6mm hook, the breaking force would be 4480kg because the 6mm hook is the weakest link.

By following these guidelines, you can ensure that you have the proper setup for your trailer, giving you peace of mind while on the road.

Setup Suggestions

Choose the setup based on the marking on your chain:

If the marking on the chain shows 4177-35, please select the setup with a title that ends in 35.

If the marking on the chain shows 4177-10, 4177-16, or 4177-25, please select the setup with a title that ends in 30.

• 6mm hammerlock+ 6mm hook suit for trailers with an ATM up to 2900kg
• 7/8mm hammerlock+ 6mm hook suit for trailers with an ATM up to 2900kg
• 7/8mm hammerlock + 7/8mm hook suit for trailers with an ATM up to 4400kg

Hook & Hammerlock for ATM below 2950kg

Hammerlock & Hook For Trailer between 2960kg and 4400kg

G100 Hammerlock & Hook For Trailer of 2500kg and 3500kg