27th Edition Machinery’s handbook

A REFERENCE BOOK
FOR THE MECHANICAL ENGINEER, DESIGNER,
MANUFACTURING ENGINEER, DRAFTSMAN,
TOOLMAKER, AND MACHINIST

BY ERIK OBERG, FRANKLIN D. JONES,
HOLBROOK L. HORTON, AND HENRY H. RYFFEL
CHRISTOPHER J. MCCAULEY, EDITOR
RICCARDO M. HEALD, ASSOCIATE EDITOR
MUHAMMED IQBAL HUSSAIN , ASSOCIATE EDITOR