Hand Tools

Subject:
Twist

Steve D, CT
Twist isn't necessarily from the factory. Pushing planes at an angle wear opposite corners more in one direction than the other. For example, a right handed person would have the right front and left rear parts of the sole see more wear and a lefty would have the opposite.

I have had Stanleys with the factory sole finish visble and they aren't very flat. Some have looked like a belt abrasive was used but others were ground.

From a tolerancing standpoint, twist is encompassed in the measurement of flatness. That is why a straightedge isn't the appropriate tool for checking flatness.

You can get a little insight into twist by checking the diagonals with a straightedge. Winding sticks don't cut the mustard at this level of precision.

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