The_Beave on Nostr: No. I never do because if I'm cutting stuff, I'm likely to weld it after and I hate ...

No. I never do because if I'm cutting stuff, I'm likely to weld it after and I hate cleaning lubricants off before welding.

Get good bi-metal blades with the correct too count for the thickness of metal you are cutting, install the blade the correct way, get a slow, clean start of the cut, don't apply too much pressure (letting the tool do the work) , and make sure the blade is tensioned very taut. Loose blades are the biggest mistake with hacksaws.