[Amps] Drill bits

[Rich & DJ]

Date: Mon, 30 Oct 2006 16:37:14 -0500
Several people said step up a little at a time and use oil , all good
ways. One more thing , make sure the drill bit has a 135 degree grind on
it , most are 118 degree for alum , and soft steel.  If it is 135 it is
for hard steel and other tough materials .
 
An old machinist, Rich, kd0zz
 
 
From: "carl s." <carlseye at tampabay.rr.com>
Subject: [Amps] drill bits
To: TARC at hamclub.org
Cc: amps at contesting.com, mosi <mosi at danmc.org>
Message-ID: <4546708A.2040704 at tampabay.rr.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
 
       to all hams who may read this.!!
      Is there one among us who is a master machinist??
     I need someone who can tell me *exactly* what type of drill bit it 
will take to drill thru a steel plate, 3/8 in. thick, Very hard (altho 
hardness is hard to verify) A 1/2 in. Cobalt drill couldn't,touch it.!!!

So , how do I drill that plate ??
   I'll give you any more info I have ( which isn't much) 
    Please let me know if you have anything to help.!!!!
    carl / kz5ca
    Mosiarc.!!!!!!!