The Acid Test
Can each machine perform all the basics?
The back of every new tool must be accurately flattened and highly polished.
In addition to sharpening hand tools, you can renew the edges of planer and jointer knives on some sharpening machines. They should offer both coarse and medium grinding because you'll have to remove a lot of steel to get past deep nicks. Good machines have easily calibrated adjustments, well-machined jigs and clear instructions.
Wouldn't you like one machine that could do it all?
The tip is highly polished at a precise steeper angle.
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