ASME B107-4 pdf download Driving and Spindle Ends for Portable Hand, Impact, Air, and Electric Tools (Percussion Tools Excluded) SCOPE This Standard applies to portable power tools fordrilling, grinding, polishing, sawing, and drivingthreaded fasteners and hand tools for driving threadedfasteners. Other tools not classed as percussion tools belong in this category and may be added by revision oraddition through the...