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Jumpcannon
12-09-2010, 03:03 PM
I need a new blade for my horizontal drop saw. Whats the difference between a "flex" and "hard" back blade? I am sawing 3 1/2" solid round 1018.

PeteM
12-09-2010, 04:03 PM
I'm assuming you have a small horizontal band saw?

All blades have a hard tooth. In the case of bi-metal blades, the tooth is a high speed steel and the back is softer. In the case of flex-back blades the tooth has been hardened, but the back is softer and more flexible. In the case of hard-back blades, the whole thing is relatively hard.

Bi-metal and flex-back blades are less likely to crack over small pulleys. Hard-back blades are a tiny bit stiffer for deep and heavy cuts and more wear resistant if you have plain guides. However, they are also more likely to suffer fatigue cracks; especially over small pulleys. Blade thickness also makes a difference -- don't put in a much thicker blade than your saw calls for if you want to avoid cracking.

Best bet for a small bandsaw is a good quality bi-metal blade with variable pitch.

Jumpcannon
12-09-2010, 04:09 PM
Excellent feedback! Thank you PeteM!