Butting
The touching of the points of the teeth of two wheels acting with one another. It is caused by the wheels being planted incorrectly, or by pinions or wheels of improper size. See Depthing Tool and Wheels and Pinions.
How to true a balance, repair a chipped dial, temper a spring or test a stone — the working bench-book of the American watch trade, arranged A to Z.
The touching of the points of the teeth of two wheels acting with one another. It is caused by the wheels being planted incorrectly, or by pinions or wheels of improper size. See Depthing Tool and Wheels and Pinions.