I need to drill a hole in the side and top of my mopeds (Tomos) oil drain and oil fill bolts in order to connect safety wire.
I have tried 3 times to drill a hole in the bolts side and each time I am off-center just a small amount.
The metal seemed very hard in comparisson to the drill bit?
What type of drill bit to use? Cobalt, Titanium, etc?
I used a High-speed steel bit, 1/16"
What can be used for cutting liquid?
Thanks for you help.
maybe I will buy new bolts with a taller top and hopefully hit the "center" point.