[Boatanchors] Chassis Mechanical Question

[Garey Barrell]

That's the one!

73, Garey - K4OAH
Glen Allen, VA

Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
<www.k4oah.com>

Chuck McGregor wrote:
> You can get a plumber's reamer that chucks in a carpenter's brace.  That was what I used for chassis holes for the 
> first 30 years of my radio hobbies.
> 73
> Chuck K7MCG
>
>
> On Fri, Feb 14, 2014 at 8:44 AM, Garey Barrell <k4oah at mindspring.com <mailto:k4oah at mindspring.com>> wrote:
>
>     A plumber's reamer works great for this, even without a drill press.  Can even be used by hand.  Looks like a
>     'T-Handle' reamer, just bigger.  Used to ream out the inner edge of pipe that's been sawed.
>
>     Built a lot of radios with one of these!!  :-)
>
>     73, Garey - K4OAH
>     Glen Allen, VA
>
>     Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
>     and TR-4/C Service Supplement CDs
>     <www.k4oah.com <http://www.k4oah.com>>
>
>     whitebear1122 at comcast.net <mailto:whitebear1122 at comcast.net> wrote:
>
>
>
>         Greetings.  I have a mechanical question.  I am in the process of drilling , milling, and hole  punching
>         several chassis's fo r my HBR-13 receiver project.  I have all the holes punched except for three octal socket
>         holes.  I just discovered the octal ceramic sockets require a 1 1/4" hole and my Greenlee punch is 1 1/8".  My
>         question is this:  Can I realistically file 1/16" all the way around with a rat tail type file and have the
>         hole look clean.  I'm worried I'll start filing and it will end up looking like crap or become  goofy shaped.
>          Is there some sanding barrel shaped attachment for a drill that would open the hole slightly and evenly?
>
>
>
>         I wonder if anyone has a used Greenlee 1 1/4" inch punch for sale.  I've got a nice selection put together so
>         far, including  5/8", 3/4", 7/8", and 1 1/8".  I've never used a punch before this and they have been
>         fabulous!  I did have to learn a lesson though.  I was so darn careful to be precise in my layout drawing, and
>         transferring those hole dimensions to the chassis.  I used the recommended punch screw hole dimensions in the
>         Greenlee instructions and then found out the holes didn't need to be that big, so the punch floated around too
>         much and all the tube socket holes are slightly offset. Darn.   Maybe it'll look better when I take the
>          masking tape off.   :)
>
>
>
>         Thanks.  73, Sc ott WA9WFA
>
>
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