RE: Drilling Blanking Plates?

[Rob Iles <rob.iles@xxxxxxxxx>]

Low cost step drill bit:

http://www.ebay.co.uk/itm/Toolzone-DR123-4mm-22mm-HSS-Titanium-Coated-Step-=
Drill-/221242586340

R.
On 15 Jul 2013 05:50, "Dave McLaughlin"
<dave_mclaughlin@xxxxxxx>
wrote:

> **
>
>
> I'll back you up on that Rob. A step drill in your tool box is a great
> thing
> 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
wer=
e
> not cheap but they are worth it if you plan to do a lot of large
holes.
> Even
> 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
hol=
e
> 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 i=
s
> interested @=A35 each +P&P :-)
>
> R.
>
> --
> Rob Iles
>
>=20=20
>


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