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Plug 3/4-10 threaded holes

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?

Reply to
Tom Gardner
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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.

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Reply to
Ignoramus22527

Take a look at

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They have plugs that will do that with ease. The high temp black silicone I looked up quick ran about $00.50 cents each in a 50 pack.

If you want threaded they also have those and will make you just about anything.

OH and they will send you samples for testing FREE!!

Used to use them by the thousands in the paint shop.

Reply to
Steve W.

I forgot about them...and I BUY parts from them! Thanks!

Reply to
Tom Gardner

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

Reply to
Tom Gardner

does not give you cnosistent depth

Reply to
Ignoramus22527

Mcmaster carr has 3/4-10 x 3/4L set screws for $0.98

Reply to
grmiller

Hmmm, those are in my budget AND I get a discount.

Reply to
Tom Gardner

I make male and female thread-holding plugs to fit in my 5C collets from 1" drill rod and use a screw-in collet stop to set the length, close enough for most applications.

Reply to
Jim Wilkins

Threaded rod sounds like your best option.

Gunner

The methodology of the left has always been:

  1. Lie
  2. Repeat the lie as many times as possible
  3. Have as many people repeat the lie as often as possible
  4. Eventually, the uninformed believe the lie
  5. The lie will then be made into some form oflaw
  6. Then everyone must conform to the lie
Reply to
Gunner

Round plastic.

Delrin. Nylon. Santana toilet partition.

Reply to
DanG

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