[Amps] drill bits

[Dan Hearn]

Clint is right. A machinist once told me that it is common to not put enough
force on the drill. If you are not making chips you need more pressure. A
drill which is not cutting is overheating, particularly if it is turning too
fast. It really helps if you use cutting oil on the bit. This smells like
sulphur and is available many places. 73, Dan, N5AR

-----Original Message-----
From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com]On
Behalf Of Clint Talmadge
Sent: Monday, October 30, 2006 2:00 PM
To: Amps
Subject: Re: [Amps] drill bits


To drill a 1/2" hole, start with a smaller size and work up in size.  The
smaller drills will often have a much easier time with the harder material
due to less heat build up.  As you step up the actual cutting area remains
small, also reducing the heat.

Hope that helps,
Clint - W5CPT

  ----- Original Message -----
  From: carl s.
  To: TARC at hamclub.org
  Cc: amps at contesting.com ; mosi
  Sent: Monday, October 30, 2006 3:37 PM
  Subject: [Amps] drill bits


         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.!!!!!!!

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