Machining Time in Grinding

The machining time (T) in cylindrical grinding can be calculated from the following relationship.

Equation 1

Where, L = Longitudinal travel in one pass (in mm),

P = Number of passes made,

f = Longitudinal feed/rev. (in mm),

N = rpm of the workpiece, and

K = a constant (Accuracy Factor), depending upon the degree of accuracy and level of surface finish.

= 1.0 to 1.2 for rough grinding (commonly used value = 1.1)

= 1.3 to 1.7 for finish grinding (commonly used value = 1.4)

In case of plunge cut cylindrical grinding, the machining time (T) is given by :

Equation 2

Where, a = grinding allowance on each in mm.

f_c = cross feed in mm/rev.,

N = rpm of the work piece, and

K = has the same significance as in case of cylindrical grinding.