Re: deep hole drilling


"Randy" <rbraun333@xxxxxxxxx> wrote in message
news:s5l795dkp2maf7m9npoavkndav1fproam6@xxxxxxxxxx
On Mon, 24 Aug 2009 13:16:54 -0500, F. George McDuffee
<gmcduffee@xxxxxxxxxxxxxxxxxxxxxx> wrote:

On Mon, 24 Aug 2009 08:25:59 -0400, Randy <rbraun333@xxxxxxxxx>
wrote:
<snip>
unless you can point me to a better drill, I do not have coolant
through spindle.
<snip>
There are coolant injectors for this situation.

for some examples see:
http://www.globalspec.com/FeaturedProducts/Detail/Rotary_Coolant_Adapters/83625/0
http://www1.mscdirect.com/CGI/NNPDFF?PMPAGE=129&PARTPG=N2DRVSH&PMT4NO=0&PMITEM=81550923&PMCTLG=54&PMT4TP=*LTIP
http://www.toolcribdepot.com/webshop/Pr_CuttingTools/D298.asp


Thanks for all the replies so far.

Ive spoken to PTD and been to the Guhring web site, neither recommends
coolant thru, both recommend a standard drill, not parabolic and not
cobalt, just plain HSS.

IOW, through-coolant is inferior to flood?
How can that be?
Unless they are saying that the drill design associated with thru-coolant
drills is not so hot.

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Per Steve's sample I'll have to write a drill routine and either cut
and paste it alot or make it a sub.

PTD recommends pecks of
5xD
4xD
3xD
2xD
2xD
2xD

I've drill aluminum manifolds similar to Steve's but mine were 18"
long with 11/32 and 7/8" thru holes. Parabolic worked great.

Thank You,
Randy

Remove 333 from email address to reply.


.

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