[modeleng] Re: Question (maybe stupid)

Peter,
 
Pop round to Trowbridge and use my hole punch!
 
(Seriously!)
 
I'll check what sizes and shapes I have tonight.
 
Contact me off list and I'll let you have my phone number.
 
Cheers
 
Peter

        -----Original Message----- 
        From: modeleng-bounce@xxxxxxxxxxxxx on behalf of 
peter.chadwick@xxxxxxxxxxx 
        Sent: Tue 27/07/2004 09:26 
        To: modeleng@xxxxxxxxxxxxx 
        Cc: 
        Subject: [modeleng] Question (maybe stupid)
        
        





        How do you produce a D shaped hole? Say 3/8 inch diameter, with a flat
        about 1/8 of a diameter? (in 16 gauge aluminium)
        
        first thoughts are punching with a punch made from silver steel and
        hardened. What about a die? I presume that when such dies are made by
        toolmakers, they first produce a broach and pull it through the die
        material, which is subsequently hardened.
        
        Anyone suggesting a file and a smaller hole will get a raspberry blown 
at
        them. I know that some say the only tools needed are a hammer, cold 
chisel
        and some files, together with skill, but that last bit is lacking, and 
I'm
        too old to get good enough in my lifetime!
        
        Peter Chadwick
        Swindon
        
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