Moving a tapped hole

[rick41]

I need to move several tapped holes in an aluminum casting.  The hole size is 2-56.  I am planning to plug the existing tapped holes with threaded rod and re=drill and tap again.  The holes only need to be moved approximately 1/2 bolt diameter.  My question is:  Do I use JB Weld or some type of Loctite to secure the threaded plug?  Any thoughts on which would be better? Thanks.
Rick

[b.lindsey]

I am thinking JB Weld will fill the gaps more. The plug definitely need to be secured so it doesn't move as you drill the new hole!

Bill

[crueby]

Also try and use rod of same material so the drill doesn't follow the softer one.

[Jo]

I normally use 638 Loctite when I have to do a repair. It has high shear strength, good gap filling properties, is oil tolerant and is high temperature resistant.

I make repair plugs with the same material as the parent.

I also normally leave it to set for 24 hours but 638 sets faster than 601, so does not really need that long but it gets it anyway.

Jo

[crueby]

Your other alternative is to use one of these bolts - the one on the upper left should do:


 

[bpudney]

I had exactly this problem, four 6B.A. holes were about half a diameter "out" in an al. alloy casting.  The holes were plugged with 7075 T6 plugs, secured with JB Weld.  The holes re-drilled and tapped.  This has worked well and is almost invisible.  The epoxy was cured at a slightly higher temperature than ambient (on top of a gas fire surround), just to be sure.
Best of luck!!
cheers
Bill