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Print Page - heat treatment of s-7 tool steel

Virtual Machine Shop Forum

Machine Tool Technology => Off Topic => Topic started by: huffnpufflen on February 12, 2013, 11:28:46 AM

Title: heat treatment of s-7 tool steel
Post by: huffnpufflen on February 12, 2013, 11:28:46 AM
I have machined a drive plate for a clausing 8530 mill and it is ready for heat treat. can anyone out there tell me if taped holes need to be oversize to allow for swelling as you would for d-2 .

I woud be upset if I had to make it over because the screws would not go.
Len
Title: Re: heat treatment of s-7 tool steel
Post by: Ron on February 12, 2013, 11:57:47 AM
I hate to admit my ignorance but I would never have thought about taping oversize in D2  :|
Title: Re: heat treatment of s-7 tool steel
Post by: huffnpufflen on February 13, 2013, 06:04:53 AM
YES D-2 tool steel must be taped .005 oversize or screws will not enter as holes shrink in heat treatment. I built stamping dies with this material and know this to be true. Ido not have much experiance useing S-7 and my D-2 experiance came to mind.
Len