Hardness Scale for Various Materials
MATERIAL BRINELL HARDNESS Drilled Diameter With Suggested Feed Rate Below 1/16″ 1/8″ 1/4″ 1/2″ 3/4″ 1″ 1-1/2″ 2″ Aluminum 99-101 .001 .003 .007 .012 .016 .020 .025 .030 Aluminum Bronze 170-187 .001 .003 .004 .008 .010 .012 .015 .020 Balkelite – .002 .005 .006 .008 .010 .012 .015 .015 Brass 192-202 .001 .003 .004 .008… Continue reading Hardness Scale for Various Materials
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