[spv123]

I own one of the Tormach SuperFly fly cutters. It is a great tool on aluminum. I am however quite gun-shy using it on mild steel. I have to surface some 1 3/4 (and wider) wide mild steel. I watched the Tormach youtube video on the SuperFly and they were running 1,000 rpm and fairly deep if I recall 0.25. Now I am not sure if that is inches, but if it is that is 6mm deep! If it is metric then I can understand. My mill vibrates badly running 0.05mm with the SuperFly on mild steel at ~500 rpm. Maybe I am running too slow?

[rowbare]

I think they were running .025 DOC i.e. 0.6 mm. Much more reasonable no? They were running 1000 rpm and 10 ipm. What feed are you running?

bob

[BAMCNC.COM]

Are you using the aluminum insert in steel? Get the correct insert.

[spv123]

I think they were running .025 DOC i.e. 0.6 mm. Much more reasonable no? They were running 1000 rpm and 10 ipm. What feed are you running?

bob

Makes a lot more sense Bob. I am manual feeding (RF45 non-CNC yet). I am running the Tormach cemented carbide inserts.

[MichaelHenry]

Makes a lot more sense Bob. I am manual feeding (RF45 non-CNC yet). I am running the Tormach cemented carbide inserts.

Tormach sells two types of inserts for their fly cutter - polished for aluminum and general purpose for (presumably) ferrous materials. Which one are you using?

Fly Cutters

[spv123]

I have both inserts - polished for AL and Cemented carbide for steel.