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Feed Rate per Revolution

Feed Rate per Revolution for Drills:
The Feed rates shown are for average conditions where coolant can be efficiently applied, where the strength of the drill is not a criticall factor and where the workpiece can be rigidly supported.  When one or more of these conditions vary, the feed must be adjusted accordingly.
 

Feed per Revolution

Drill Dia. Range

Light

Medium

Heavy

1/16" - 1/8

.0005-.0010

.0010-.0020

.0020-.0030

Over 1/8" thru 1/4"

.0010-.0030

.0030-.0050

.0050-.0070

Over 1/4" thru 1/2"

.0030-.0050

.0050-.0070

.0070-.0090

Over 1/2" thru 3/4"

.0050-.0080

.0080-.0110

.0110-.0140

Over 3/4" thru 1"

.0080-.0110

.0110-.0140

.0140-.0170

Over 1"

.0120-.0150

.0150-.0200

.0200-.0250

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