3 inch diameter cylinder is turn for a 9300 inch length of c

3 inch diameter cylinder is turn for a 9.300 inch length of cut cutting speed is 240 feet per minute and The Cutting time is 2.12 minutes calculate the tool feed in inches per Revolution round the answer to three decimal places

Solution

Cutting speed / Cylinder perimeter = Spindle speed

(240 * 12) / (3 * pi ) = 306 RPM

Feet is changed to inches by multiplying with 12.

Cut length / Feed rate = Cut time

Feed rate = Cut length / Cut time = 9.3 / 2.12 = 4.387 IPM

Tool feed * Spindle speed = Feed rate

Tool feed = Feed rate / Spindle speed = 4.387 / 306 = 0.01 IPR

N.B : IPM -Inches per minute

         RPM- Revolutions per minute

         IPR - Inches per revolution