Tapping Hardened S-7

[Midwest]

quote:

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no lie, the taps we used were osg exocarb-vx.

they are ticn coated tungsten carbide, they

are designed for 50-60 rc. go to osgtool.com

and find yourself a rep localy and set up a

demo. the place i work right now also had a

rep come in and we tapped 48rc h-13 with a

1/2-13 and 52rc s-7 with a 1/4-20 . yes if i

did not see it with my own eyes i would not

believe it either. but as someone on the

forum say "those who say it cannot be done

should not get in the way of those who are

doing it" enjoy , trevor

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We just "hand tapped" (12) 1/4-20 blind holes into hardened S-7 52-54 Rc.........they didn't get tapped deep enough. Chipped 1 flute on the 2nd hole........hit the bottom.

 

 

Around $85 for the tap........cheap for the time it saved.

 

 

Thanks Trev

 

 

EXO CARB-VX Taps

 

 

Old Thread Linky....... Click Here

 

 

OSG has a nice video also comparing EDMing time to Hard Tapping time.

 

 

[John13]

What's up with the duplicate thread, this was already covered once,

[Midwest]

 

There is that LITTLE noise again...

 

[Hardmill]

quote:

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There is that LITTLE noise again..

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Dont bother ignoring it, it wont go away.

 

 

Ive had good luck with OSG taps in the past.

And have also thread milled heat treated S7 (10.32).

 

 

PEACE

[Ed@Elite]

I have done this before too!! Simply amazing!! Actually the holes were drilled and tapped for 1/4-20 and they were supposed to be 5/16-18. I had the OSG rep come out and he had never tried drilling an existing hole bigger and tapping. It took a few taps and a few drills, but man, like you said it saved a ton of money and time. OSG even split the cost of the taps and drills that broke. They are a great company to deal with and make great stuff!!

[lowboy]

Emuge taps will do the same thing

[Thee Dragracer1951]

Maybe I just ain't big enough. I never have had a tool guy come to the shop.

[Goldorak]

OSG drills are simply incredible

once i drilled about 6500 holes in ss316l 1/2 dia 1in deep

and after that the drill looks like a brand new one

[Thee Dragracer1951]

That's IT pal....I'm sending all my 316 jobs to YOU!!

[Goldorak]

quote:

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That's IT pal....I'm sending all my 316 jobs to YOU!!

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thrust me . ss316 is very ez to machine here

 

compared to other unmachinable stuff we do !!!