Ensuring your OzHitch coupling fits correctly to your trailer or caravan is crucial for a secure and stable towing experience. The key to this is accurately measuring your bolt hole dimensions. This simple guide will walk you through how to measure your trailer’s bolt hole centres to make sure you select the correct OzHitch coupling for your needs.
Why Bolt Hole Measurements Matter
Bolt hole dimensions determine whether your trailer or caravan’s drawbar will be compatible with your chosen OzHitch coupling. Accurate measurements are essential for:
- Ensuring a secure fit.
- Reducing wear and tear caused by loose or misaligned couplings.
- Improving overall towing safety and stability.
Tools You’ll Need
- Measuring tape or ruler
- Marker or pencil (optional, for marking points)
- Clean cloth (to clear any dirt or debris from the drawbar)
Step-by-Step Guide to Measuring Bolt Hole Dimensions
Step 1: Clean the Surface
Before measuring, ensure the surface of your trailer’s drawbar is clean. Use a clean cloth to remove any dirt, rust, or debris around the bolt holes. This will give you a more accurate reading.
Step 2: Measure the Length (Front-to-Back)
- Identify the two bolt holes that run front to back on the trailer’s drawbar.
- Place your measuring tape or ruler in the centre of the first hole.
- Measure the distance from the centre of the first hole to the centre of the second hole.
- For example, many 4-bolt OzHitch couplings have a length of 184mm.
- Write down the measurement, which will give you the length.
Step 3: Measure the Width (Side-to-Side)
- Next, identify the two bolt holes that run side to side on the drawbar.
- Again, place your measuring tape or ruler in the centre of the first hole.
- Measure the distance from the centre of the first hole to the centre of the second hole.
- For most 4-bolt OzHitch couplings, the width is 54mm, while other models like the 2.5T model have a 76mm width.
- Write down this measurement as the width.
Step 4: Additional Holes for 6-Hole Configurations
If your trailer requires a 6-hole coupling:
- Measure the centre holes as well. These additional holes provide extra stability and are typically spaced at 76mm from the main bolt holes.
- Make sure to measure the centre-to-centre distance just like in previous steps.
Example Measurements for OzHitch Models
Here are some common bolt hole dimensions for different OzHitch models:
- 4-Hole OzHitch (2.0T and 3.5T models):
- Length: 184mm
- Width: 54mm
- 4-Hole OzHitch (2.5T model):
- Length: 104mm
- Width: 76mm
- 6-Hole OzHitch models (2.0T and 3.5T):
- Outer holes: 184mm x 54mm
- Centre holes: 76mm spacing
For a detailed breakdown of dimensions for each model, visit our Bolt Hole Dimensions Page.
What If My Trailer’s Dimensions Don’t Match?
If your trailer’s bolt hole dimensions don’t match the standard OzHitch models, you have a few options:
- Modify the Drawbar: You can drill additional holes to match the correct pattern, but ensure this is done with precision to maintain safety.
- Use an OzHitch Weld-On Mounting Plate: This can be added to your drawbar to create a secure and compatible base for your coupling.
Need Assistance? Contact Us!
If you have any questions or need further assistance, feel free to call us on (08) 8260 2277 or Contact Us here. We’re here to help ensure your OzHitch coupling is always performing at its best.
By accurately measuring your Bolt Hole Dimensions, you ensure a safe and secure connection for your OzHitch coupling, allowing you to tow confidently, no matter the terrain.
Need Assistance? Contact Us!
If you have any questions or need further assistance, feel free to call us on (08) 8260 2277 or Contact Us here. We’re here to help ensure your OzHitch coupling is always performing at its best.
For more installation resources and tips, visit our Resources Page.
OzHitch: Built tough for Australia’s toughest conditions.
