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Author Topic: Custom tool grinding  (Read 2743 times)

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Custom tool grinding
« on: December 23, 2010, 02:20:44 PM »
Hi All,
  Any experience with tool and cutter grinding ?
Basically, a step drill.
.5" stepped down to .345 at the end forabout .355 length.
The point would be very shallow, 150 deg or so.
The shoulder would be 82 deg countersink.
A modified one of these would be great.
 http://www1.mscdirect.com/CGI/NNSRIT?PMCTLG=00&PMAKA=56443997&partnerURL=http://catalogs.shoplocal.com/mscdirect/index.aspx%6Fpagename=shopmain%50circularid=16558%50storeid=1040626%50pagenumber=218%50mode=
...or something similar.
Might need about 10 or so with sharpening service as well.
Thanks,
 :)

Or, can anyone direct me to other mfg or tooling that might fit the bill ?
Thanks
« Last Edit: December 23, 2010, 02:33:26 PM by Overloaded »
Re: Custom tool grinding
« Reply #1 on: December 23, 2010, 03:04:29 PM »
Hi, if you own a lathe, this can be easily  achieve with a simple dremel.

Simply place the dremel on the tool stand of your lathe with a bar clamp.

Just grind the tip slowly and it work great.

Of course, this is great if you only have to grind one or two.

For a larger quantity, you better buy.

I've done that a couple of time for special drill.


Jeff
Re: Custom tool grinding
« Reply #2 on: December 23, 2010, 04:59:23 PM »
Nice plan Jeff, thanks.
I do have a surface grinder with a 5C rotary fixture to grind the basic form, but I would have to do the relieving by hand.
Might try one and see, but I'd like to find them precision made.
Maybe even carbide.
Thanks again,
RC

Offline RICH

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Re: Custom tool grinding
« Reply #3 on: December 23, 2010, 06:52:22 PM »
RC,
I have a bunch of pilot drills and they are all marked "SEMCO" so you may want to try that company and see what they make.
Maybe search under "aircraft drills".
Grinding them yourself would be a PITA and may take more time than you think and they won't be consistant. It would seem that somebody out there would make what
your after.
RICH

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Re: Custom tool grinding
« Reply #4 on: December 23, 2010, 06:58:02 PM »
One more thought, check out a good sharpening service as they can  probably grind them using an end mill sharpener.
RICH
Re: Custom tool grinding
« Reply #5 on: December 23, 2010, 10:22:06 PM »
Hi Rich,
 Semco search doesn't turn up much.
I don't know of any sharpening service, nothing here locally anyway but that's exactly what I'm looking for.
This was my first stop, thought someone here might just have a direct reference to an individual or facility.
I'll dig around a bit more. Good lead,
Thanks