Heat Bluing Steel for my 2×72 Inch Belt Grinder Project

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I’m in the process of building a 2″ x 72″ belt grinder powered by the permanent magnet motor from an old treadmill. The business end of the grinder is a pair of rollers and platen that supports the sanding belt. I milled these out of some 3/8″ steel plate

Damn! I’m bluing everything from now on!

Damn! I’m bluing everything from now on!

Interesting! That discoloration is evidence of a ground off weld telegraphing through the heat bluing!

Interesting! That discoloration is evidence of a ground off weld telegraphing through the heat bluing!

I call this look “Blue Steel”.

I call this look “Blue Steel”.

Arrrrgh!

Arrrrgh!

It’s happening again.

It’s happening again.

Now to figure out the mount.

Now to figure out the mount.

It’s starting to look like a grinder!

It’s starting to look like a grinder!

They predicted a foot, we got a foot

They predicted a foot, we got a foot. #science

Learning that deeper not faster is way.

Learning that deeper not faster is way.