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Ignoramus22527 Ignoramus22527 is offline
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Default Plug 3/4-10 threaded holes

On 2012-11-27, Tom Gardner Mars@Tacks wrote:
On 11/26/2012 7:54 PM, Ignoramus22527 wrote:
On 2012-11-27, Tom Gardner Mars@Tacks wrote:
I pulled the bolster plate on a 30 ton Bliss press to repair the
hold-down bolt holes. There are 21 inserts that are "T" shape with a
minor dia. of 1.25" and the major dia. of the flange is 2", they are
installed from the bottom and are drilled and threaded 5/8-11. I
drilled them all out and threaded them 3/4-10. What happens is after
only 20 years or so the 5/8-11 holes get boogered-up and stripped.
sometimes the dies get changed 10 times a day. The 3/4-10 should last a
LOT longer and hold better. I want to plug all the holes that aren't
being used for that set-up so crap and little pieces of steel wire don't
get in the hole and shorten the thread life and hamper easy set-ups.

I looked on the web and I'm NOT spending $3-5 apiece. I will cut
threaded rod and grind or mill a slot for a screwdriver if I can't find
a better solution. The plugs have to be easy and quick to remove and
install and keep the spoo out. Any suggestions?


I also would not pay that much.

Make a vise fixture with a 3/4-10 hole, that you would hold in a
vise. You use the hole you would screw in the rod for precision
cutting off.

i


Cool! How about a 5C collet block in the lathe? That shouldn't hurt
the threads...but your way would be faster!


does not give you cnosistent depth