On 7/7/2018 7:27 AM, Emanuel Berg wrote:
Are there any secrets to drilling holes in
steel bike frames? I have a couple of discarded
ones I can test on but I thought I'd
ask anyway.

Do you use normal power hand tools like
a drill-screwdriver and/or a drill press (if
possible with the desired bolt position)?

Do the normal rules apply, e.g. to get
a threaded hole for an M6, you first drill with
a 5.0mm drill?

And you can use chainsaw oil, right?

As Jobst Brandt stated: "I don't know many riders who believe that
drilling a hole in a frame tube is a reasonable concept."