Is a blade a blade?
Worn out HSS hacksaw blades are usually worthless...but no...I needed 36 Cir-clip grooves 0.020" wide x 0.018" deep.......cut into 0.125" [yes 1/8"] diameter brass rods......
Speaking about this dilemma.......a retired Toolmaker at out Train Society...said.....no problem bring them down to his workshop
Me thinking how many times will a 0.020" wide parting off tool break?
So this Chap...using a 1/8" collet chuck in the trusty Myford M7 ....produced a standard parting off tool holder but with a reinforced side spacer however the parting off tool was a ground section of a
used HSS hacksaw blade side ground to 0.020"
36 grooves totally dimensionally correct in 15 minutes & no tool breakage