Tree Cutter
Well-known member
Do I tap a through hole all the way or just far enough to get the Heli coil in? Will it move when the bolt goes in if i tap too deep?
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Heli coil advice
- Thread starter Tree Cutter
- Start date
jaker10
Well-known member
As far as you want. If you have a deep hole you can even stack them on top of one another. The heli coil won't move after you put it in they spring out after assembly. you will see when you put it in.
txvwnut
Well-known member
I usually tap as far as I can then set the heli-coil in until the first full thread is in a complete groove. I've never had the thread coil spin when inserting the bolt and I've helo-coiled some odd setups.
OP
Tree Cutter
Well-known member
As far as you want. If you have a deep hole you can even stack them on top of one another. The heli coil won't move after you put it in they spring out after assembly. you will see when you put it in.
Great, anything I should be wary of before trying this? It is going into aluminum. Use Locktite?
Dustball
Well-known member
No Loctite needed.
Do you have the kit with the required tap and driving tool?
Do you have the kit with the required tap and driving tool?
Kevin54
MEMBER EMERITUS
No Loctite needed and you can either tap all the way through, or you can tap to a certain depth. Just make sure that the last coil of the heli-coil is one thread below the surface of the part.
CAUTION......make sure you bust your tang off after the heli-coil is inserted. And if you can, try to keep track of the broken tang. If you are heli-coiling something like the top of the intake, or around electrical parts, you want to make sure the broken tang doesn't get somewhere where it doesn't belong. That is one safety practice that we had to do at work was to keep track of the tangs after breaking them off. Also if you don't break them off, you will lock up a bolt or screw in the heli-coil and have a ***** of a tie getting it back out as it will cross thread and lock up.
CAUTION......make sure you bust your tang off after the heli-coil is inserted. And if you can, try to keep track of the broken tang. If you are heli-coiling something like the top of the intake, or around electrical parts, you want to make sure the broken tang doesn't get somewhere where it doesn't belong. That is one safety practice that we had to do at work was to keep track of the tangs after breaking them off. Also if you don't break them off, you will lock up a bolt or screw in the heli-coil and have a ***** of a tie getting it back out as it will cross thread and lock up.
BillK
Well-known member
tree,
Sounds like you have it under control. The only hint I will give has to do with removing the tang when you are done. Don't know what size you are dealing with but I always find a flat ended punch that just fits into the helicoil then I smack it real quick with a small ball peen hammer. If you try to break it off slowly it will bend and can be a problem.
Sounds like you have it under control. The only hint I will give has to do with removing the tang when you are done. Don't know what size you are dealing with but I always find a flat ended punch that just fits into the helicoil then I smack it real quick with a small ball peen hammer. If you try to break it off slowly it will bend and can be a problem.
scissorman
Well-known member
What are you installing it into? I prefer time-certs over a heli-coils but there is a place for either one and IMO a heli-coil should NEVER be used for spark plug threads, not saying that's your intended use but just throwing it out there.
You have to have enough threads in the hole so the heli coil will go all the way in. Are you aware that heli coils come in different lengths to match thread depth or plate thickness? So you not only have to match diameter and thread pitch but have the right length also.
lg
no neat sig line
lg
no neat sig line
Last edited:
Eds_tls
Well-known member
Helicoils do not move when the bolt is inserted
maxpower_hd
Well-known member
What are you installing it into? I prefer time-certs over a heli-coils but there is a place for either one and IMO a heli-coil should NEVER be used for spark plug threads, not saying that's your intended use but just throwing it out there.
X2. I have used Heli-coils but I prefer the thread inserts like the EZ-LOK which is what I use. Probably the same idea as the time-certs. Just what I can get here.