Abstract
Abstract The limitations of boring, reaming, burnishing, and broaching as finishing operations on cylindrical bores have led to the general use of abrasives for such work. Improvements in manufactured abrasives and study of operating data, together with improved methods of application, have made grinding a precision process. The cost of operation and the difficulty of bearing maintenance of planetary-type grinders have brought about the use of the expanding grinder or so-called “honing” method. The latter method has the advantage of speed, improved accuracy and finish, and low cost. It also makes possible the precision grinding of long tubes, gun-barrel rifling, and bores with ports, keyways, and relieved portions.
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