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Home » Customer Support » Metalworking » Calculators » Turning » Calculating Time for Facing, Cutfoff, and Deep Groving

Workpiece Nomenclature

Unit:

R_o Outside radius : in

R_i Inside radius of tubular cross section : in

Machining Conditions

n CNC lathe maximum spindle speed : RPM

V_C Programmed cutting speed for the spindle : sfm

f Programmed feed rate for the cutting tool : ipr

R_MIN Workpiece minimal radius at the maximum rpm : in

Cutting Time

Cutting time when facing and cutting a solid workpiece : min sec

Cutting time for facing, cutoff, and deep grooving a tubular workpiece :

when R_i > R_min min sec

when R_i < R_min: min sec

These calculations are based upon theoretical values and are only intended for planning purposes. Actual results will vary. No responsibility from Kennametal is assumed.