CAD CAM EDM DRO - Yahoo Group Archive

Re: [CAD_CAM_EDM_DRO] Re: Thread milling

Posted by R Rogers
on 2004-12-09 22:04:45 UTC
Robert Lyman <robsheplyman@...> wrote:



R Rogers wrote:



////I was taught and its common knowledge within the ranks that there is no such thing as a size range on collets. Collets are ground to specific diameter. Using them on any other diameter will disfigure them and is referred to as "the cardinal sin of collets". Installing a larger or smaller than intended diameter in their bore will result in 3 points of contact within the spindle and risk triangulating the taper. To hold a tap shank which none of them are nominal, simply make an adapter in the lathe with a nominal O.D and setscrew to secure. There are some commercially available with collapsible collets like tapmatic uses if memory serves me correct.

Ron


There are dozens of various collet designs,

///"standard collets" was the topic.

some of which have a set size, some have an acceptable grip range. Many old school machinists say to never use collets with taps or end mills, yet I work in an aerospace shop where we use collets with end mills and taps 16hrs a day, six days a week. They hold tight tolerances (+/- .0002) and thread mill almost daily. For many threads, odd fine internal threads on large diameters, thread milling is the feasable way to get it done. Have any of you seen a 4"-32tpi tap laying around, and if you have, what do you chuck it up in?

///The square on its end is for a handle/wrench. The center in its end is for a machining center to align it. Its wasn't designed to be "chucked". Nothing wrong with threadmilling. End mills in "standard" collets are bad about pulling out under heavy loads. Of course in aluminum this isnt much of a problem. Steel, is a different story. large endmills removing heavy stock need to be in holders.








---------------------------------
Do you Yahoo!?
The all-new My Yahoo! � Get yours free!

[Non-text portions of this message have been removed]



Addresses:
FAQ: http://www.ktmarketing.com/faq.html
FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com

Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@..., timg@...
Moderator: pentam@... indigo_red@... davemucha@... [Moderators]
URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO

OFF Topic POSTS: General Machining
If you wish to post on unlimited OT subjects goto: aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if you have trouble.
http://www.metalworking.com/news_servers.html

http://groups.yahoo.com/group/jobshophomeshop I consider this to be a sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list.

NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
bill
List Mom
List Owner


Yahoo! Groups Links











---------------------------------
Do you Yahoo!?
Send holiday email and support a worthy cause. Do good.

[Non-text portions of this message have been removed]

Discussion Thread

Drew Rogge 2001-03-29 12:54:19 UTC Thread milling Jon Elson 2001-03-29 16:01:09 UTC Re: [CAD_CAM_EDM_DRO] Thread milling Jon Elson 2001-03-29 16:05:03 UTC Re: [CAD_CAM_EDM_DRO] Thread milling Marcus 2001-03-29 16:12:17 UTC Re: [CAD_CAM_EDM_DRO] Thread milling Smoke 2001-03-29 16:51:32 UTC Re: [CAD_CAM_EDM_DRO] Thread milling Drew Rogge 2001-03-30 08:36:55 UTC Re: [CAD_CAM_EDM_DRO] Thread milling beer@s... 2001-03-30 12:49:28 UTC Re: Thread milling Jeff Jones 2004-12-09 09:20:10 UTC Re: [CAD_CAM_EDM_DRO] Re: Thread milling metlmunchr 2004-12-09 11:19:35 UTC Re: Thread milling Andy Wander 2004-12-09 11:40:24 UTC RE: [CAD_CAM_EDM_DRO] Re: Thread milling Jeff Jones 2004-12-09 12:19:43 UTC RE: [CAD_CAM_EDM_DRO] Re: Thread milling Graham Stabler 2004-12-09 12:30:38 UTC Re: Thread milling Jon Anderson 2004-12-09 12:49:42 UTC Re: [CAD_CAM_EDM_DRO] Re: Thread milling V FONG 2004-12-09 12:59:44 UTC Re: [CAD_CAM_EDM_DRO] Re: Thread milling Jeff Jones 2004-12-09 13:00:46 UTC Re: [CAD_CAM_EDM_DRO] Re: Thread milling Tom Hubin 2004-12-09 13:10:51 UTC Re: [CAD_CAM_EDM_DRO] Re: Thread milling Jeff Jones 2004-12-09 13:37:44 UTC Re: [CAD_CAM_EDM_DRO] Re: Thread milling Peter Renolds 2004-12-09 16:22:43 UTC Re: [CAD_CAM_EDM_DRO] Re: Thread milling R Rogers 2004-12-09 16:53:11 UTC Re: [CAD_CAM_EDM_DRO] Re: Thread milling Jon Anderson 2004-12-09 18:11:39 UTC Re: [CAD_CAM_EDM_DRO] Re: Thread milling Andy Wander 2004-12-09 18:26:53 UTC RE: [CAD_CAM_EDM_DRO] Re: Thread milling Stephen Wille Padnos 2004-12-09 18:35:37 UTC Re: [CAD_CAM_EDM_DRO] Re: Thread milling Robert Lyman 2004-12-09 19:49:04 UTC Re: [CAD_CAM_EDM_DRO] Re: Thread milling cnc002@a... 2004-12-09 19:56:56 UTC Re: [CAD_CAM_EDM_DRO] Re: Thread milling R Rogers 2004-12-09 21:35:49 UTC Re: [CAD_CAM_EDM_DRO] Re: Thread milling R Rogers 2004-12-09 22:04:45 UTC Re: [CAD_CAM_EDM_DRO] Re: Thread milling Jon Anderson 2004-12-09 23:03:31 UTC Re: [CAD_CAM_EDM_DRO] Re: Thread milling Jeff Jones 2004-12-09 23:06:53 UTC Re: [CAD_CAM_EDM_DRO] Re: Thread milling Torsten 2004-12-10 05:16:11 UTC Re: Thread milling Graham Stabler 2004-12-10 05:17:07 UTC Re: Thread milling - collets etc off topic John Meissner 2004-12-10 06:09:54 UTC Re: Thread milling - collets etc off topic Wayne 2004-12-10 06:56:43 UTC Re: [CAD_CAM_EDM_DRO] Re: Thread milling - collets etc off topic R Rogers 2004-12-10 07:24:15 UTC Re: [CAD_CAM_EDM_DRO] Re: Thread milling metlmunchr 2004-12-11 10:09:41 UTC Re: Thread milling, and yeah, I know it's OT wanliker@a... 2004-12-11 13:11:29 UTC Re: [CAD_CAM_EDM_DRO] Re: Thread milling, and yeah, I know it's OT