IMHO there should be no problems, a 3/4" Bolt is meaty.
Use a drill press to drill the hole, make sure you keep the bolt straight.
How I would do secure the bolt for both drilling and tapping, is use two Nuts on the bolt and secure it in a Drill Press Vice.
Once the hole is drilled, tap the bolt slowly, by hand, in one turn out one half turn, in one turn or two, out a half turn and so on and so on !
Use a good quality cutting/tapping oil, it will make all the difference in the world. Dependent on how deep you are going, they even have oil for deep tapping... what is the difference, I do not know !
The grade 5 bolts are harder than grade two and not as hard as grade 8, but very workable, shouldn't cause you a lot of grief, just take your time !
I have drilled a three inch, grade five bolt, almost all the way through, cross drill it, and tapped the head end for a grease fitting, I used it for greasing inside of a Spring bushing. I've also drilled all the way through a one quarter inch bolt, two inch long to make a small sand blaster gun..., so it can be done. I use a high speed drills and turn up the Drill Press Speed, and drill SLOWLY.
Keep the drill sharp and lubricated. Less walking with a sharp drill.
That my two cents... good luck on the project.
Ltr
