Jump to content

Welcome to eMastercam

Register now to participate in the forums, access the download area, buy Mastercam training materials, post processors and more. This message will be removed once you have signed in.

Use your display name or email address to sign in:

alloy 42 drilling


mike561h
 Share

Recommended Posts

On 1/22/2019 at 9:06 PM, mike561h said:

Its some nasty stuff. 304 on steroids.. Anyone have any experience drilling .052 diameter etc....

We are using HSS drills..😬   I did notice coolant just font work. better luck with oil.  

they recommend 30 to 70 SFM.....  pecking .015  

 

thanks.

 

set those HSS drills aside and buy Carbide drills with through spindle coolant holes if your machine supports TSC. In that size they wont be extremely expensive. Pecking in general wears tooling out very quickly with all the entry's into the material so if you must peck try to make them as large as possible while still removing the chips, on a .052 dia drill i would think you could peck deeper than .015, but if the carbide drills are reasonable priced i would go that route since it would probably do it much better than hss. 

If you are in a bind and cant wait on tooling or have other reasons like rpm limitations or something else i understand but if there are not other limiting factors i would go Carbide for the drills and if used properly they can be more cost effective over time than those HSS drills.

Link to comment
Share on other sites
On 1/23/2019 at 12:42 PM, Allan said:

The alloy 42 is Kovar 42% nickel.

The pecking is not good or recommend causes work hardening; how deep is the hole?

Check out these drills: http://www.osgtool.com/_branding/books/80060CA/resources/_pdfs_/80060CA__.pdf

 

Allan

the holes are .200 deep.. I did the Kovar part and it was not to bad.. but the alloy42 was killer on drills

ill check these out.... thanks

Link to comment
Share on other sites

 Ive drilled .033 holes  in 43HrC 15-5PH Cres  at 1.0"/Min feed 1200RPM and .008" peck using a carbide drill. The projection of the drill must be as small as you can. The depth was .245". But i'm new at this game. That worked for me. I need to ask the operator how many times he changed the drill during the job. I just know he didn't break any drills in the pieces because we are aerospace and everything thats scrapped is tagged.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

  • Recently Browsing   0 members

    • No registered users viewing this page.

Join us!

eMastercam - your online source for all things Mastercam.

Together, we are the strongest Mastercam community on the web with over 56,000 members, and our online store offers a wide selection of training materials for all applications and skill levels.

Follow us

×
×
  • Create New...