Power hacksaw blades.

JTknives

JTknives

Joined
Jun 11, 2006
Messages
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i just picked up 8 power hacksaw blades for .70 each from my secret bargan store :D.

there made by wespa and thay are 18" long and 1 3/4" wide and .08 thick. thay say High speed Molybdenum and are made in germany. the number is 33-180580. any idea if thay are any good steel. thay have 6 teath per inch
 
First thing to look at - is it a bimetallic blade ? That is often the body of the blade is one material and the cutting edge is better steel.
 
nope one steel. i just tryed putting an edge on the back of the blade with a 60 grit belt and o my goodness it just laughted at the belt. it was like 10 times harder to grind than a hard file. a file seams like mild steel compared to this. what could the steel be, M2 maybe. im now gessing its going to be a bitch to stock remove even though its onley .088 thick. nice water bottle cutter :D.
 
I have some of these they are extremely hard, but if you flex them much will snap. grinding them is a bitch
hard to annel. and they will get razor sharp. Jim
 
now if it is m2 how steep of a edge bevel should i put on it, what can it handle.
 
JT, Did you figure out yet what you're going to do with all those hunks of metal that you got from your "secret store"?:D
- Mitch
 
I know a guy who grinds M2 power hacksaw blades very thin with very acute edges. He said something like 5 deg per side. At HRC 65 and with a high carbide content, they hold an edge. His are used to butcher cows.
 
I have had a couple of power hacksaw blades, 2" x 24" and about 3/32 thick. Ceramic belts will cut them, but they take a while. Solid carbide drills cut them fine, but my technique sucks :grumpy: and I have broken about 3 different 1/8 bits as they break through the back. Need to try a backing block.

Here are two ideas...

Come up with a design you like, preferably something that tessellate well, maybe something like a kiridashi, and send the blades for water-jet cutting. You could get a bunch of blades profiled, and even get the holes done at the same time.

If you size things right, the scrap left after cutting the blades can be used to make some very good tools for cutting holes for hidden tangs. Like broaches. I have used an cutting disk and wet cloths and made a couple like this.

I was thinking that it would be kind of cool to makes something with a saw back using the existing teeth.
 
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