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1. 07:27 PM - Re: copy hole pattern? (Ron Lendon)
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| Subject: | Re: copy hole pattern? |
[quote="carlossa52(at)gmail.com"]So, with this thingy in place, you drill a 3/32"
hole, and then enlarge it to #21 / 20 as need be ?
And same principle for #30, I presume..
Neat!
Carlos
On 13 August 2010 22:42, Ron Lendon wrote:
>
>
> Yep, Look here:
> http://mykitlog.com/users/display_log.php?user=rlendon&project=113&category=0&log=59265&row=431 (http://mykitlog.com/users/display_log.php?user=rlendon&project=113&category=0&log=59265&row=431)
>
> --------
> Ron Lendon, Clinton Township, MI
>
>
> [b]
That's how it works. Your drills need to be sharp split point and spinning fast
(my Makita 6501 spins at 4500rpm) to hold the center. Let the drill do the work
and don't push to hard when marking the centers.
As Paul alludes to Line drilling in steps works best. If you get the hang of this
though, you can do as I do, mark the centers using this tool, drill a few
of them and get some silver clecos in them, (try for every other hole). Once
you have the part held in place drill all the pilot holes, open to #30 and copper
cleco, remove silver clecoes and step holes to #30, #20 then black cleco,
remove copper and open those holes to #20.
Before any drilling, lots of clamps to hold things where they belong. Drilling
holes in light sheet metal will drift if you don't keep the drill bit perpendicular
to the sheet, again use light pressure and let the drill do the work.
Replace worn drills with new ones, and use the split points for the pilot holes,
they cut from the center. You might also need a Tight Fit Drill Kit, I use
mine all the time in tight places.
--------
Ron Lendon, Clinton Township, MI
WW Corvair with Roy's Garage 5th bearing
Zodiac XL, ScrapBuilder ;-)
http://www.mykitlog.com/rlendon
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=308849#308849
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