a little tap topic

[Scott Bond]

Hi

We have some chassies with a lot of 2-56 blind holes .Can some of my mastercam brothers tell us what you did when you made similar holes.

material alum

about 1500 holes per part

x .160 deep

[sbrooks]

All i can say is roll form tap.

[mikee]

I agree. Roll tap if at all possible. You get more holes per tap and no chips in the holes !!

If you already drilled the holes for a standard tap, guess what. they are not big enough for a roll 2-56 tap.

Now one question, are these holes for helicoils? Havent seen a roll tap for helicoils. Call a local tool vender

Otherwise running a bottom tap in 1500 holes is asking for a broken tap. In chassies we always ran a roll tap or use as machine tap then a bottom tap. You got to get the chips out for the the second tap. We also had a pnumatic tapping machine to do this.What a time saver.

Hope this helps.

mikee

[limitless creativity]

That many holes you should think about a tapmatic holder. It would save you mucho time per part. Talk to Kenbil Eng. Bruce Baslee

909 689-6683 their in Riverside. Tell them Mike with Kitamura asked you to call

Mike

[Scott Bond]

Hi

 

Thanks for your posts

[johns]

In aluminum it's always best use roll form tapping for #10 or smaller. Years ago Tapmatic had a self-reversing head with a very short release stroke for shallow holes. I don't know if it's still available.