Re: Thread milling, and yeah, I know it's OT
Posted by
metlmunchr
on 2004-12-11 10:09:41 UTC
--- In CAD_CAM_EDM_DRO@yahoogroups.com, R Rogers <rogersmach@y...> wrote:
regards to diameter. This is simply not true. No gray area. Its one of
the very basic fundamental rules regarding "standard" one piece
collets. R-8 or 5C. Its a big no-no. Any machinist knows this. Its
part of the first day in the shop orientation for new recruits. Not my
rule just the industry practice. Taps don't belong in a spindle. Thats
why they dont fit. They belong in tap handles and tapping
heads...where they were designed to be used.
someone who obviously has no idea what the hell they're talking about,
when what I said was absolutely correct in the first place. Next
time, you might consider reading up on what the manufacturers state
concerning DA, TG, or ER collet systems, and the acceptable collapse
range for each, since, regardless of your vast array of experience, it
would appear they're devices you don't even know to exist. Then, it
won't be necessary for you to push a topic OT by posting erroneous
information and causing others to respond to correct it. Wrong
information is worse than no information at all.
To add a bit of information which I believe would be on topic, for
anyone who has converted, or is converting a machine with an R8
spindle to CNC, there are several sources for collet chucks with R8
shanks. They're usually designed to hold ER collets. While they're
not cheap, generally in the $400 to $500 range for the chuck and a set
of collets which cover the full range, they will allow you to hold
fractional, number, and letter drills plus any other metric or
odd-size shank tool in your machine without needing to repeatedly
purchase odd size R8 collets that may only be used once in a while.
There's no availability of cheap R8 collets in odd sizes, so when you
start buying them from Hardinge at 30 bucks apiece or more, it doesnt
take long to spend the price of a collet chuck, and there's still an
infinite number of sizes you DON'T have.
> I'm not confusing anything with anything. The original posterindicated that "standard" collets have a range of acceptability in
regards to diameter. This is simply not true. No gray area. Its one of
the very basic fundamental rules regarding "standard" one piece
collets. R-8 or 5C. Its a big no-no. Any machinist knows this. Its
part of the first day in the shop orientation for new recruits. Not my
rule just the industry practice. Taps don't belong in a spindle. Thats
why they dont fit. They belong in tap handles and tapping
heads...where they were designed to be used.
> RonFor some strange reason, I don't take kindly to being "corrected" by
someone who obviously has no idea what the hell they're talking about,
when what I said was absolutely correct in the first place. Next
time, you might consider reading up on what the manufacturers state
concerning DA, TG, or ER collet systems, and the acceptable collapse
range for each, since, regardless of your vast array of experience, it
would appear they're devices you don't even know to exist. Then, it
won't be necessary for you to push a topic OT by posting erroneous
information and causing others to respond to correct it. Wrong
information is worse than no information at all.
To add a bit of information which I believe would be on topic, for
anyone who has converted, or is converting a machine with an R8
spindle to CNC, there are several sources for collet chucks with R8
shanks. They're usually designed to hold ER collets. While they're
not cheap, generally in the $400 to $500 range for the chuck and a set
of collets which cover the full range, they will allow you to hold
fractional, number, and letter drills plus any other metric or
odd-size shank tool in your machine without needing to repeatedly
purchase odd size R8 collets that may only be used once in a while.
There's no availability of cheap R8 collets in odd sizes, so when you
start buying them from Hardinge at 30 bucks apiece or more, it doesnt
take long to spend the price of a collet chuck, and there's still an
infinite number of sizes you DON'T have.
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