R 408.12639 Boring, honing, reaming, and drilling.

Rule 2639. (1) An employer shall ensure that when boring, honing, reaming, or drilling, all of the following provisions apply: (a) Except for hand-held honing, the workpiece is secured by a device to prevent it from being turned by the tool. (b) Manual measuring at the point of operation is done only when the tool or rotating workpiece has stopped. (c) A vertical metal cutting machine with a rotary table has a rim guard either fixed or portable around the table of a height to cover any pinch point or rotating hazard at the lower side and to a point not less than 2 inches above the workpiece or fixture, whichever is higher. Where the rotating table is at floor level, a removable guardrail system must be installed as prescribed in General Industry Safety and Health Standard Part 2. “Walking-Working Surfaces,” being R 408.10201 to R 408.10241 of the Michigan Administrative Code. (d) Multiple-spindle heads, except when used for tapping and those with cam-operated slides, have an emergency return control at each station. (2) A chuck key that is used on a drill press must be as prescribed in R 408.12648(2).