Welcome back to Albany County Fasteners, Fasteners 101. I'm Bob,
and today I'm going to demonstrate how to install a helicoil.
In this situation, it's called an EZ coil. They're all the same at the end of the day.
We're gonna install that into this chunk of stainless steel. So let's get started.
So I have this EZ Coil kit.
On the back it has the directions on how to install a Helicoil.
This is a thread repair kit. I've taken out the inserts here. I have the helicoils here.
I have the tap, the set tool, and the helicoil. I want to show you the helicoil.
It has this piece of bent coil right here, and here is the the tool that sets it.
It has a little groove in the center of this tool here that you can see.
That little bent piece from the helicoil goes on the bottom of the tool.
You're going to have to be about 3/8 of an inch deeper to repair the thread to have the room to set the coil in there.
Because at the end, you'll have to take a hammer and you have to bang the head to get rid of that piece.
So if it's a spark plug or a bolt that has to go through, that Tang is going to prevent the bolt from going through.
I also have here my punch and my drill bit.
I also wanted to let you know that on a 1/4"-20 in these kits, you'll see that it says here 1/4"-20 x 1.5D.
What does that mean?
What that means is that the length is 1.5; it's one and a half times the diameter of the helicoil.
So that would be 0.375 in length. This is because the diameter is 1/4in.
So 0.375 would be the length which is one and a half times the diameter.
Typically they're either one times the diameter, so 1/4" long,
one and a half times the diameter, which would be 0.375,
or two times the diameter and typically that's the longest you're gonna get in a helicoil.
In that scenario it would be a half-inch long overall.
If you get a helicoil and if you measure it, it's going to smaller in length.
The length that they're quoting as 1.5 times, which is 0.375 long,
is not for when it's compressed, but when it's installed.
Ok, so I have my pre-loaded punch here. I'm just gonna punch a hole or a starting point in the stainless.
Now I'm going to take the helicoil, and I'm going to put the tang over the tool.
Then I'm going to start to screw it in.
You have to apply pressure as you do it. It should be down just about 2 turns from the top of the hole.
That's what it is. Okay. So there it is.
Once they're in there, it's hard to back it off. So I'm going to take my hammer, and now I'm gonna hit it.
*Ting*
There it is. Broke off.
I'm going to take my 1/4"-20 hex cap screw and I'm gonna thread that in.
There you go. Thanks for watching.