If the torque on the spindle pulley of a drilling machine is 35N.m and 30% of this torque is used to overcome friction, calculate the cutting force on each cutting edge of a 10mm diameter twist drilling connected to the spindle.

Answer 1

First, we need to calculate the total cutting force required by the drilling machine:

Total Torque on spindle pulley = 35 N.m
Friction Torque = 30% of 35 N.m = 0.3 * 35 = 10.5 N.m
Effective Torque for cutting = Total Torque - Friction Torque = 35 - 10.5 = 24.5 N.m

Now, we need to calculate the cutting force on each cutting edge of the 10mm diameter twist drilling connected to the spindle:

Radius of twist drilling = Diameter/2 = 10mm/2 = 5mm = 0.005m

Cutting Force = Torque / Radius = 24.5 N.m / 0.005m = 4900 N

Therefore, the cutting force on each cutting edge of the 10mm diameter twist drilling connected to the spindle is 4900 N.