Rockwell hardness number (HR)
Number derived from the net increase in the depth of impression as the load on the indenter is increased from a fixed minor load to a major…
Browse
Glossary Terms
Latest Glossary Terms
Rockwell standard hardness test
Indentation hardness test uses a calibrated machine that utilizes the depth of indentation, under constant load, as a measure of hardness. …
Rockwell superficial hardness test
Indentation hardness test uses a calibrated machine that utilizes the depth of indentation, under constant load, as a measure of hardness. …
roll
Rotation about an axis, as with a rotatable wrist.
rotary attachment
Bolts to a milling machine to permit machining such shapes as circular T-slots and cams.
rotary transfer machine
Type of CNC machine tool for high-volume, extended-length production runs of a family of parts. A workpiece is transferred from station to …
roughing cutter
Tool for high-volume metal removal; normally followed by finishing passes. See finishing tool.
roughness
Irregularities on the surface of a workpiece caused by production process. Includes traverse feed marks within the limits of the instrument…
salt fog test (salt spray test)
Accelerated corrosion test in which specimens are exposed to a fine mist of a solution usually containing sodium chloride but sometimes mod…
sawing machine (saw)
Machine designed to use a serrated-tooth blade to cut metal or other material. Comes in a wide variety of styles but takes one of four basi…
sawing
Machining operation in which a powered machine, usually equipped with a blade having milled or ground teeth, is used to part material (cuto…
scalloping
Wavy surface condition caused by deflection, unbalanced tool, loose workpiece or tooling or worn machine.
