Drill 4 x 28mm holes through 44mm thick aluminium

[WandrinAndy]

A straight shanked boring head would be better if you can get a small one with a 12mm arbor to fit in the chuck. ... Or ask someone nicely... hobnobs and/or beer often work ;)

Thanks Irving... Haven't seen hobnobs on here since that little spat a couple of weeks ago, which is sad as I really enjoyed his sense of humour... and benefitted from his contributions.

I will make use of a machining service that has access to a lathe and CNC, as that tooling looks expensive for now... Is a boring head and a fly-cutter one and the same thing?

[irving2008]

Thanks Irving... Haven't seen hobnobs on here since that little spat a couple of weeks ago, which is sad as I really enjoyed his sense of humour... and benefitted from his contributions.

I will make use of a machining service that has access to a lathe and CNC, as that tooling looks expensive for now... Is a boring head and a fly-cutter one and the same thing?

Essentially, tho a boring head is arguably more accurate as it holds a cutter at a known distance from the axis and is adjusted with a micrometer screw whereas a flycutter generally holds a bit of tool steel out at an angle. Boring heads generally allow you to bore deep holes; flycutters are usually used to cut circular holes in sheet of relatively low thickness..


If I could get at my mill or lathe I'd offer to do it for you, but at the moment I can't physically get at them .... :(