Hi all,
Just getting a 2nd opinion
I have some oldr E16 J citizens that have many stripped bolt holes in the #1 turret--To many hammer mechanics here and over the years. Don't know why everyone wants to tighten bolts like a lug nut to machine .250 and down but they do.
I was going to go the helicoil route on these but wondred if anyone had another fix.
TRR
Shop Doc Forum » CNC Swiss
Stripped turret bolt holes
(4 posts) (3 voices)-
Posted 2 years ago #
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heli-coils, e-z locks, or keenserts, you choose.
Posted 2 years ago # -
I never really cared for the Heli-coil type inserts; I have had too many pull out or come out when you unscrew the fastener.
I personally prefer the solid insert type that you can stake in place. They don't come out and they are very strong. I've seen them made of std steel and stainless steel. The problem with these is that they require a lot of real-estate, meaning the hole you need to make for them is much larger than for the Heli-coil type. For example: you may have to drill and tap a 3/4"-16 hole for a 1/2"-20 thread.
You can check out Keyserts by Alcoa at Allfasteners.com. MSC sells a number of types, both spring-type and solids.Posted 2 years ago # -
Thanks for the replys,
I'm not sure yet how I will drill out to re-thread. Hand drill??
The self locking seem to be what I want.Not sure that I would want to drill for 1/2 -20. That big I may lose the bolt hole pattern to hold the tool holders on center. I'm not sure but think the turret would be hardened.
The other problem will be people tightening the repair to tight. That's what got me in this in the first place. It's only a screw machine with 3/4 inch capacity and they tighten the holders and everything like they are putting on a truck tire lug nut!!
thanks again
TRR.Posted 2 years ago #
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