RE: Drilling Blanking Plates?

["Dave McLaughlin" <dave_mclaughlin@xxxxxxxxxxxxx>]

I'll back you up on that Rob. A step drill in your tool box is a great
thin=
g
to have. It even works great on thin sheet metal etc. Far less chance of it
catching and breaking the plate.

I used to have 2 different sizes (wish I still had them now) and they were
not cheap but they are worth it if you plan to do a lot of large holes.
Eve=
n
the small one for doing, say 10mm holes, is far better than a 10mm drill
bit.


Dave...

-----Original Message-----
From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf Of
Rob Iles
Sent: 15 July 2013 01:53
To: ukha_d
Subject: Re: [ukha_d] Drilling Blanking Plates?

I can add a "don't try this method" FWIW!

Needed 15mm holes in standard blanking plate. Drill chuck max 10mm,so
piloted, 5mm,8mm,10mm (all good so far). Then used a conical metal oxide
grinding bit to extend it......... Worked ok at first, but on the 2nd hole
the plastic melted, rendering the grinding bit useless, the motor on the
(cheap) dremel style device burned out, and 3rd attempt (new bit, new
tool)=
,
the bit "caught" and fractured the plate. :-(

A stepped drill bit did the job in the end!

I have some very nice momentary contact push buttons for sale if anyone is
interested @=A35 each +P&P :-)

R.

--
Rob Iles




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