Helicoil and blade raising thread

[LCHIEN]

...Found the article in the list, and it appears that 9/16-12 is the thread size. Anyone know if that is universal for all BT3000s?

...Maybe we could start a tool lending library for commonly needed BT3X repair tools

as far as I know, the 9/16-12 is common to all BT3 variants.

We did have a floating kit but it was lost when someone broke the chain.

[drillman88]

From your description I wouldnt think so. The helicoil would probably be best. You may be able to tap the hole to 5/8 and change the bolt or threaded rod on the machanism to 5/8.
After thinking about it a 5/8 plug wouldn't leave enough strength to drill and tap a 9/16 hole. 3/4 would be the best for this applicaion. If you went to 3/4 to plug the hole you would be really close to or would take out the sleave.

[woodturner]

If you have a set of large taps and there is enough meat around the hole, you can drill and tap it to 5/8. Then put a piece of all thread in using red loctite then drill and tap this out to 9/16 after the loctite sets. You are basically plugging the hole and redrilling it.
We do this type of repair at work quite a bit and it works well.

I am not sure if it is possible but i was throwing the idea out there.

I appreciate the suggestion, interesting idea. In this case, though, the aluminum casting has a "sleeve" that extends out from the base, and this sleeve is tapped. There is maybe 1/8" of material surrounding the hole, so there is not a lot of extra material. Do you think this would still work, or is that too little material?

[drillman88]

If you have a set of large taps and there is enough meat around the hole, you can drill and tap it to 5/8. Then put a piece of all thread in using red loctite and drill and tap this out to 9/16 after the loctite sets. You are basically plugging the hole and redrilling it.
We do this type of repair at work quite a bit and it works well.

I am not sure if it is possible but i was throwing the idea out there.

[Tom Slick]

Helicoil taps are specific to helicoil; You'll need a tap and install tool.

[woodturner]

Just picked up another BT3000 off Craigs list, but it has a stripped blade raising thread so I need to install a helicoil.

Found the article in the list, and it appears that 9/16-12 is the thread size. Anyone know if that is universal for all BT3000s?

Looks like the Helicoil kits are up to $30 or so now, though the inserts are still inexpensive. Is the tap for a Helicoil different from a normal tap, or will a tap the next size up work fine? I'm trying to avoid buying more tools I'll use only once

Maybe we could start a tool lending library for commonly needed BT3X repair tools