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Make your own Biothane adapter with a handy template | Tutorial

When making paracord collars it can be nice to use a Biothane adapter. This makes the collar adjustable in size. Here you see how to make such an adapter yourself.

Paracord collar with biothane adapterAn adapter is ideal to make your project adjustable. You see such a Biothane closure used especially with handmade dog collars, for example with knotted paracord collars.

What do you need for a Biothane adapter?

In this blog we assume that you will use rivets to attach the Biothane. Do you choose to use chicago screws? If so, it is best to choose 5 mm long screws for 2 layers of biothane.

For the adapter of 25 mm biothane, you can use these materials: 

Do you make an adapter with biothane in a different width? Then, of course, adjust the size of the materials accordingly.

These are the tools we use for making the adapter:

To make the holes in the biothane and fix the rivets, the spindle hand press is used here. Don't have a spindle press? You could also do this by hand with Ivan tools.

Cutting the ends

You can choose to cut the ends of the biothane at an angle, round or to just cut the corners. This is purely a matter of taste, so it will not affect the rest of the adapter.

Strap of biothane

Biothane strap with rounded ends

Marking holes on the biothane

To make your adapter as neat as possible, it's handy to first mark where the holes need to be in the biothane. An adapter mould is an ideal tool for this, as it allows you to easily mark the right places without having to first measure where the holes should be.

In the picture below you can see the template. This also shows the area where you should fold the biothane and where the accessories should be placed.

How does the biothane adapter template work

Biothane in the template for biothane templateTake the piece of biothane and place it in the mould. Make sure that the edges of the template and the biothane are aligned. You will notice that the end of the biothane is just outside the mould.

Now flip over the template with the biothane. Now make a small dot in the middle of each hole with your pen or marker, to mark where the actual holes should be. Try to make the dot as close to the middle as possible.

Marks on biothane where the holes should come

Punching holes in the biothanePunching holes in biothane with the hand spindle press

Now that you have marked the biothane, you can start punching the holes. Here we use a spindle press, but as mentioned before you can also do this manually with Ivan tools.

With the spindle you can punch the holes in a quick and efficient way. Put an extra layer of biothane or leather under the biothane of the adapter, so that the anvil and hole punch are damaged as little as possible.

Punch the holes in the place of the markings you have made on the biothane.

Strap biothane with punched holes to make a biothane adapter

There is also a special spindle template available. Here you use the template on the spindle itself. This makes it easy to punch the holes in a straight line.

Are the holes not neat enough? Then you can heat a paracord needle and hold it in the hole to melt away the remaining polyester. Caution: never use a direct heat source (such as a lighter) on biothane. The substances that are emitted in this way are toxic.

Making the holes in biothane smoother

Adding accessories and joining biothane

After you have punched all the holes, add the metal accessories. First slide the D-Ring and then the Tri-Glide over the biothane.

Adding accessories to biothane strap

Folding biothane with the accessories in the folded loopNow fold the shortest piece of biothane in half so that the accessories are 'locked' in the biothane loop. Make sure that the holes that enclose the accessories are aligned. The rounded side of the D-Ring and the empty opening of the Tri-Glide are pointing outwards.

If you are working with chicago screws, it is now a matter of putting the female side through the holes, putting a drop of Loctite in it and then fixing the male side firmly on top.

Fixed rivets in biothane adapterIn this example, we are using rivets with a 10 mm cap. We are securing these using the spindle press and the accompanying 10 mm rivet die set.

In this video you can see how to use the spindle hand press to fix the rivets.


Adding the belt buckle

Your adapter is now almost ready! The only thing left to do is adding the belt buckle.

Handmade biothane adapter with rivets

Not really your thing to make this yourself? Fortunately, the biothane adapters are also available ready-made!

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