I have read in several sources that a mirror can be used to guide a tap in straight when tapping by hand. However, they don't explain how exactly to use the mirror. I'm too retarded to figure it out. Can anyone help?
This is an old trick. Lay the mirror down on the workpiece, flat, in front of the tap.
The mirror doubles any angular error that is present, if the tap is coming in at a small angle from the right, its reflection will be below the tap, but also to the right. The tap and its reflection has to be straight.
/ / / / ------------------------------- (mirror) \ \ \ \
That sort of thing.
Jim
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Good for East and West. Do you need a second mirror for North and South?
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