34 Pa. Code § 29.211
The following words and terms, when used in this subchapter, have the following meanings, unless the context clearly indicates otherwise:
Guarded, encased or enclosed—The object is so covered, fenced or surrounded that contact which may result in injury, at the point of danger is remote.
Hazardous—The location of an object so accessible that it permits contact that may result in injury.
Machine tool—Any power-driven machine that employs a tool for working on metal. The counter shaft shall be considered a part of the machine.