I have to make a hole of Dia 13.5mm and 68mm deep in Aluminium 6082. The finish required is 0.8 Ra max.
I am doing bigger holes on CNC lathe with carbide boring bars. But this one seems to be challenge as I will have to use a 8mm Carbide boring Bar would mean L/D ratio of 8.5 Times. This results in chattering.
I am thinking of doing this hole on a VMC. But I am not sure about the tools to use! Maybe a Drill of 13.25mm followed with a boring bar. Or maybe a PCD drill?
Wohlhaupter sales person is not confident that it is possible on their holders even with carbide boring bar and not not seem to have a solution.
So I guess it may have to be PCD Drill.
I am doing bigger holes on CNC lathe with carbide boring bars. But this one seems to be challenge as I will have to use a 8mm Carbide boring Bar would mean L/D ratio of 8.5 Times. This results in chattering.
I am thinking of doing this hole on a VMC. But I am not sure about the tools to use! Maybe a Drill of 13.25mm followed with a boring bar. Or maybe a PCD drill?
Wohlhaupter sales person is not confident that it is possible on their holders even with carbide boring bar and not not seem to have a solution.
So I guess it may have to be PCD Drill.