[Shop-talk] Safety Wire Drill Guide

[Randall]

> Not sure if there's any secret here.  I've drilled a dozen 
> 1/8" safety wire holes in Grade 8 bolts before using a single 
> cobalt bit in a drill press, and without the tool you linked 
> to -

But did you start on the corner of the bolt head?  That's what the linked-to
tool is designed to do; and it has a guide right next to the bolt head to
hold the drill on-center to the corner.  Seems to me that even a cobalt bit
is going to grab the corner of the bolt head and bind or break; unless you
grind a small flat for the bit to start into.

-- Randall