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Re: [TowerTalk] Drill bits

To: "Tower and HF antenna construction topics." <>
Subject: Re: [TowerTalk] Drill bits
From: jimlux <>
Reply-to: "Tower and HF antenna construction topics." <>
Date: Wed, 24 Mar 2010 05:00:14 -0700
List-post: <">>
Guy Molinari wrote:
> Hi all,
>     I don't know why this is so hard.   I'm trying to drill out some hole on 
> some 3/8" steel plates that I'm going to have galvanized.   I bought a 13/32" 
> drill bit and it worked great for about 10 holes or so.   The problem is that 
> I have about 140 more to go.   Any recommendations on a good quality drill 
> bit?   
Are you using a cutting lubricant?

Are you doing it in one shot, or starting with a small drill size and 
working up?

What speed are you running the drill at?  (It should be fairly slow, RPM 

Are you using a drill press or hand drill?


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