James1979
Member
- Messages
- 8,438
- Location
- Orkney
Any ideas!!
I have to drill a number of holes into aluminium, about 60-80mm deep. Diameter is either 1/8” or 3mm.
I spot the hole fine with a centre drill and all is square and level etc etc in the mill.
It appears to be pot luck if the drill wanders or not
sometimes it’s bang on. Others it’s gone over by 1mm which is not acceptable as there is a small shaft running through the holes.
ive tried new bits, regrinding them, pilots and all sorts. Nothing appears to make a consistent difference….
I have to drill a number of holes into aluminium, about 60-80mm deep. Diameter is either 1/8” or 3mm.
I spot the hole fine with a centre drill and all is square and level etc etc in the mill.
It appears to be pot luck if the drill wanders or not
sometimes it’s bang on. Others it’s gone over by 1mm which is not acceptable as there is a small shaft running through the holes.
ive tried new bits, regrinding them, pilots and all sorts. Nothing appears to make a consistent difference….