[Boatanchors] Chassis Mechanical Question

[hwhall at compuserve.com]

It can be done though it takes a bit of time compared to punches. To keep the hole round, make a template for a circle the right size, and mark the tube hole circle on the chassis. That way, as you file, you can see where to remove material and where to stop. With only a little care, the hole will be decent enough that when the socket it put in, it will be hard to tell the hole was finished by hand.
 

 Wayne
WB4OGM



-----Original Message-----
From: whitebear1122 <whitebear1122 at comcast.net>
To: Boatanchors <Boatanchors at mailman.qth.net>
Sent: Fri, Feb 14, 2014 7:56 am
Subject: [Boatanchors] Chassis Mechanical Question

 
 
 
 
 
 
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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