CAD CAM EDM DRO - Yahoo Group Archive

Re: [CAD_CAM_EDM_DRO] Threadmilling success...

Posted by Jason Cox
on 2003-10-24 16:23:57 UTC
Kim,

Went one better for you, that thread you want is a UNEF 1" 9/16 - 18TPI
Listed at the lower of this page....

http://www.efunda.com/designstandards/screws/unified.cfm?start=302&finish=39
6

Have fun,

Jason Cox.


----- Original Message -----
From: Kim Lux <lux@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Saturday, October 25, 2003 6:37 AM
Subject: [CAD_CAM_EDM_DRO] Threadmilling success...


> I tested a Micro 100 TM250 single row thread mill today by milling a
> couple of 3/8-24 threads without much trouble.
>
> I drilled a couple 21/64" pilot hole using a G78 canned cycle. The
> holes were a bit oversized because I had the feedrate a bit high.
>
> I installed the TM250 in a collet and called the thread milling cycle I
> just wrote for TurboCNC. It machined a beautiful thread. My call was:
>
> G222 Z-1 D0.384 Q0.312 K0.41666 I0.010 F4 P1
> Where:
> Z = final depth of the thread
> D = final OD of the thread
> Q = starting diameter of the thread
> K = thread pitch (1/24 = 0.041666)
> I = feed increment for the radius path milling
> F = feed rate in IPM
> P = 2 finishing passes at the final diameter.
>
> I ran it at about 150% feed override, ie 6 IPM. It was kind of slow,
> but yet it was done quite quickly, being that I didn't have to manually
> cut the thread or load/set any special tooling. I didn't optimize the
> feedrate or depth of cut at all, I just ran it at that. Future threads
> might be cut quicker.
>
> I didn't know where to set the final OD. I measured a 3/8" tap and
> found the OD to be 0.379" A cut at that OD would start the bolt on the
> taper, but it wouldn't thread in. Adding 5 thou made a pretty good
> thread. A cut at 0.390 is a bit sloppy.
>
> I've got to cut a thread 1-9/16" x 18 TPI for a ballnut. Does anyone
> know how to calculate the starting hole diameter other than to subtract
> the pitch from the major diameter ? ie 1-9/16" - 1/18" = 1.5069" BTW:
> I've got a helical milling routine written too, so I'll cut the hole
> that way. Ie I don't have to buy a drill bit exactly the right size to
> cut the (oddball) hole size for the thread.
>
> --
> Kim Lux <lux@...>
>
>
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Discussion Thread

Mike McCaughey 2003-10-24 09:32:45 UTC DenverCNC? Tim Goldstein 2003-10-24 10:20:09 UTC RE: [CAD_CAM_EDM_DRO] DenverCNC? William Schmiedlin 2003-10-24 15:36:01 UTC RE: [CAD_CAM_EDM_DRO] DenverCNC? Kim Lux 2003-10-24 15:36:58 UTC Threadmilling success... Tim Goldstein 2003-10-24 16:19:54 UTC RE: [CAD_CAM_EDM_DRO] DenverCNC? Jason Cox 2003-10-24 16:20:02 UTC Re: [CAD_CAM_EDM_DRO] Threadmilling success... Jason Cox 2003-10-24 16:23:57 UTC Re: [CAD_CAM_EDM_DRO] Threadmilling success... Derek B. 2003-10-26 23:14:04 UTC RE: [CAD_CAM_EDM_DRO] DenverCNC? Peter Homann 2003-10-27 00:16:08 UTC RE: [CAD_CAM_EDM_DRO] DenverCNC? Tony Jeffree 2003-10-27 00:35:27 UTC RE: [CAD_CAM_EDM_DRO] DenverCNC? Derek B. 2003-10-27 09:11:22 UTC RE: [CAD_CAM_EDM_DRO] DenverCNC? Peter Homann 2003-10-27 15:12:03 UTC RE: [CAD_CAM_EDM_DRO] DenverCNC? Tim Goldstein 2003-10-27 15:59:43 UTC RE: [CAD_CAM_EDM_DRO] DenverCNC? Peter Homann 2003-10-27 16:44:31 UTC RE: [CAD_CAM_EDM_DRO] DenverCNC? Tim Goldstein 2003-10-27 16:48:05 UTC RE: [CAD_CAM_EDM_DRO] DenverCNC? Statman Designs, LLC 2003-10-27 21:21:09 UTC Re: [CAD_CAM_EDM_DRO] DenverCNC? ballendo 2003-10-28 00:25:47 UTC Re: DenverCNC? Derek B. 2003-10-28 06:49:35 UTC RE: [CAD_CAM_EDM_DRO] Re: DenverCNC? Tim Goldstein 2003-10-28 07:39:05 UTC RE: [CAD_CAM_EDM_DRO] Re: DenverCNC? ballendo 2003-10-29 06:37:26 UTC OT thank you was Re: DenverCNC? ballendo 2003-10-29 06:39:25 UTC OT thank you was Re: DenverCNC?