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12-14-2018, 04:24 PM
Hi Vostre
Hole saws are designed for wood. I tried one on aluminium many years ago and it makes a ridge around the hole as the metal heats up, then you have to file off the ridge. Through steel it should be cleaner since steel has a grain where Al is particulate.
In the SVT project in TUT3, a stiffening plate is added to support the very heavy transformer set. The extra metal is just a Hammond 19" rack face plate that is 0.125" aluminium. Really, this will flex, too, with the extreme PT and OT weight and what is really needed is a right-angle piece or two underneath.
Hole saws are designed for wood. I tried one on aluminium many years ago and it makes a ridge around the hole as the metal heats up, then you have to file off the ridge. Through steel it should be cleaner since steel has a grain where Al is particulate.
In the SVT project in TUT3, a stiffening plate is added to support the very heavy transformer set. The extra metal is just a Hammond 19" rack face plate that is 0.125" aluminium. Really, this will flex, too, with the extreme PT and OT weight and what is really needed is a right-angle piece or two underneath.
