Final answer:
The correct machine speed (RPM) for milling aluminum with a 6" diameter HSS side milling cutter, with a recommended cutting speed of 550 FPM, is approximately 350 RPM. The provided options do not contain the correct answer; the closest incorrect option listed is 3520 RPM.
Step-by-step explanation:
The subject of the question is related to the calculation of the machine speed (RPM) for a milling operation in manufacturing or mechanical engineering. The process to calculate the correct RPM for milling aluminum with a specific cutter and cutting speed is as follows:
The formula to calculate RPM (revolutions per minute) is:
RPM = (Cutting Speed x 12) / (pi x Diameter)
Given:
- Cutting Speed = 550 FPM (feet per minute)
- Diameter of cutter = 6 inches
Substitute the values into the formula:
RPM = (550 x 12) / (pi x 6)
RPM = 6600 / (3.1416 x 6)
RPM = 6600 / 18.8496
RPM = 350.195
Therefore, the closest answer from the options given is B) 3520 RPM. However, this result is actually incorrect because the calculation result should be around 350 RPM, not 3520 RPM. It appears there was a misprint in the options provided, and the actual correct answer should be around 350 RPM. The provided options do not contain the correct answer based on the calculation.