13-03-2022, 10:10 AM
Although I'm an old school engineer I tend to avoid using stainless if I can.In bolts it's A2 and A4.A4 being the marine quality and don't rust.
Steel off the top of my head ,might be wrong but think there's 303 and 316,303 the much easier to work.
S/S tends to work harden,especially if you get it too hot,try cutting it too fast,blunt tools.
I again as old school have a set of imperial and metric drills but really with the 0.1 mm increments on metric sets they cover sizes better than the old fractional ones.
You may be lucky with a cheap set re quality but unlikely I think.Run them slow and clamp your job,especially in a drill press and use a cutting fluid.
Steel off the top of my head ,might be wrong but think there's 303 and 316,303 the much easier to work.
S/S tends to work harden,especially if you get it too hot,try cutting it too fast,blunt tools.
I again as old school have a set of imperial and metric drills but really with the 0.1 mm increments on metric sets they cover sizes better than the old fractional ones.
You may be lucky with a cheap set re quality but unlikely I think.Run them slow and clamp your job,especially in a drill press and use a cutting fluid.