For the 1/2 inch drill bit, what is the unscaled feed rate in inches per minute before applying the 60% reduction?

Study for the Design and Manufacturing Lab Exam. Explore flashcards and multiple-choice questions with hints and explanations. Prepare for your exam with confidence!

Multiple Choice

For the 1/2 inch drill bit, what is the unscaled feed rate in inches per minute before applying the 60% reduction?

Explanation:
Feed rate in drilling is found by multiplying how far the drill moves per rotation by how many rotations occur each minute. So the unscaled feed rate in inches per minute equals the feed per revolution times the spindle speed (RPM). In this scenario, the numbers given lead to an unscaled feed of 6.1 in/min. The 60% reduction would then scale this down to 0.6 × 6.1 = 3.66 in/min for actual cutting. The option given as per-revolution (0.008 in/rev) is not in the requested units, and the other minute-values would require different RPM or feed-per-rev values that don’t align with the setup.

Feed rate in drilling is found by multiplying how far the drill moves per rotation by how many rotations occur each minute. So the unscaled feed rate in inches per minute equals the feed per revolution times the spindle speed (RPM). In this scenario, the numbers given lead to an unscaled feed of 6.1 in/min. The 60% reduction would then scale this down to 0.6 × 6.1 = 3.66 in/min for actual cutting. The option given as per-revolution (0.008 in/rev) is not in the requested units, and the other minute-values would require different RPM or feed-per-rev values that don’t align with the setup.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy