[AT] Drill Problem

[CEE VILL]

Richard,

Just a couple tips from someone with 45 years of holes, probably mostly in 
my head.

You could try your local drill supplier for a bit made from cobalt steel.  
This would hold up better in tempered steel.  Make sure your bits are at 
least high speed steel, NOT carbon steel.  Carbon steel is like bottom of 
the line.  Carbide would be super good, but is expensive, and will fracture 
easily due to its high hardness.

Before you start each hole, dip the bit in a cutting oil and stop part way 
thru and dabble more on the drill point with a cheap paint brush or 
whatever.  If you don't have cutting oil, use some WD 40. or at least some 
motor oil.  Keep your drill speed low enough and pressure high enough to 
produce a good curly chip.  You will notice a big change if how fast the 
drill penetrates when the tip is wet with the oil.

Often times people think more drill RPM is better, but in many cases it only 
overheats the drill tip, takes out the temper, then rolls the cutting edges 
right off.

Hope this gets 'er done for you.

Charlie V. in WNY

PS   TN coated is another option.  The super hard surface may hold up 
better.  These are usually gold colored. Cool tractor ref.



>From: "rasmith4 at juno.com" <rasmith4 at juno.com>
>Reply-To: Antique tractor email discussion group 
><at at lists.antique-tractor.com>
>To: at at lists.antique-tractor.com
>Subject: [AT] Drill Problem
>Date: Sat, 18 Dec 2004 02:08:13 GMT
>
>
>
>I need to drill a few more 3/8 holes in my cow stanchions.  I tried using 
>my normal drills but they quickly became very dull.  I suspect that the 
>stachions are "hardened" steel.
>
>Does any one know how do do this or what kind of drill bit to use?
>
>Richard
>In Central NY
>
>P. S.  If you really need a tractor reference......The stanchions hold the 
>cows which eat the hay that comes from the field which is plowed with one 
>of my tractors!
>
>
>
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