shaft deformation bar
shaft deformation bar
[′shaft ‚dē‚fȯr′mā·shən ‚bär] (mining engineering)
A length of 1½-inch (3.8-centimeter) pipe fitted at one end with a micrometer and at the other end with a hard-steel cone for measuring the deformation in the cross section of a shaft.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.