Category Archives: metalworking

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Bandsaw Repair

I spent some time repairing the metal chopping bandsaw. Cut a new temporary bracket with oxyacetylene.

Sharpening took a while. I tried using a file on each tooth at first, which worked for maybe six cuts before it dulled again. Then I took a dremel to each tooth to deepen the valley between teeth, before simply running a sharpening stone backwards over the flats of the teeth. That did the trick and I got a lot more cuts out of it.

There is still something wrong with how the blade is held, as it cuts everything at a funny angle. But it’s good enough for now.

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The Aluminum Foundry

The aluminum foundry is propane fired using a venturi nozzle built from pipe fittings. The burn chamber is an old propane bottle that was thoroughly cleaned out before being cut open with a cutting wheel on an angle grinder.

Here’s an example of what I’ve done with it.
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The mould is made from greensand (a mixture of fine silica sand, bentonite clay powder and water)

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