Free hacksaw blades and how to make them

[old kodger]

no need to use carbide burrs, all you need to do is regrind masonry drills to resemble the top of a high speed twist drill. I often drill tempered spring steel with one, it works well and they're cheap

[old_toolmaker]

Another method I have used to drill holes in hardened saw blade stock is to anneal the blade in the area of the desired hole before drilling. Once annealed it can be drilled through with a standard twist drill. I do this by chucking up a pin about the same diameter of the desired hole and running it at a high speed in a drill press. The friction of steel running against steel heats the blade material to red hot. It can then be easily drilled.

[Hans Pearson]

Interesting hacksaw frame! What I would consider an ergonomic design, and it looks pretty antique too. O took a Mitco "Professional" hacksaw frame and moved the handle down so the middle lined up with the blade, meaning that the force of the hand was transmitted onto the blade, unlike before where the force was transmitted into the space between the frame and the blade, just like the one above.

[katy]

Was taught that by an old timer many years ago.

[Philip Davies]

Thanks for this. Coincidentally, today I tried for the first time to repair some broken blades, never done it before, 2 out of six snapped when filing back the lap after silver soldering, si if the other 4 failin use, I shall know what to do with them!