Originally Posted by
mike1
Went to hardware store got some bi metal blades diablos and irwin couldnt get any spyders. Got 3 different types can someone tell me what kinds of scrap i can use them for so i dont mess a blade up? 1 is irwin 18tpi 8" 203mm. Diablo is 6" thin metal less than 1/8" 20/24 tpi full contact the other is 9" 18 tpi medium metal goes up to 5/16" would 5\16" be a big copper pipe? Thanks.
Any of those will work on copper some better than others. if it were me I would use a coarse tooth blade on copper and or aluminum.
Very fine tooth for cutting exhaust pipe and run the saws thing a slow speed, otherwise you just end up over heating the blade when this happens the temper from the steel is gone, You've annealed the blade.
If you really want to become a professional use a blade lubricant.
Olson Saw #AC70010 Saw Blade Lubricant Stick for Band Saw Blades
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