This maybe a dumb question, but I was just making a set of heavy duty shackles, and it came to me.........
Everything I do on my 4x4s is mostly a matter of trail and error. I didn't pay much attention in shop class when I was a kid (and kicking myself for it), and I have never really had anyone to show me how to do things properly or "the tricks of the trade" etc. I just buy tools and then try to figure it out on my own.
Right now I am making a set of shackles for a girl who is having some tire rubbing problems. I have come up with a decent technique with the limited tools I have, and have created a template for making these shackles for profit.
So far this is what I have learned from the last 5yrs or so of working on my Jeep and now a Samurai:
High-speed drill bits dull quickly.
Titanium drill bits break easily.
Cobalt drill bits rock, especially using a drill press.
Most of my drilling is mild steel, up to 3/8" thick. I'm currently using a small bench drill press with a 1/2" Cobalt bit on 3/8" mild steel, at 1100 rpm (recomended by the drill press manufacturer).
I set up my template, secure the piece on the deck, and pour some oil in the hole of the template. I drill a few seconds, pour oil, drill a few seconds and keep repeating this until the hole is finished.
Tonite I had to use Air Tool oil, but I usually use 3in1 Oil.
Is that speed right (manufacturer recomendations aren't always the right ones)?
Is my technique right?
Is there a better oil I should use?
Are there other drill bits I should be aware of?
I only just started using Cobalt a few months ago. I didn't know about them before that. They are expensive ($25 CND for a 1/2" bit), but I feel they work better, and last longer than any other bit I've used.
Thanks for the help!
<font color=red>Vancouver Island, B.C., Canada...eh!