To remind me how long jointer or planer knives have been in use, I write the date of their last maintenance on a short length of painter’s tape stuck to the machine.

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To remind me how long jointer or planer knives have been in use, I write the date of their last maintenance on a short length of painter's tape stuck to the machine. I write "installed" for new knives, and "rotated" after flipping double-edged knives to the second edge.
—Craig Ruegsegger, Deputy Editor