In a single pass drilling operation, a through hole of 15mm diameter is to be drilled in a steel plate of 50mm thickness. Drill spindle speed is 500rpm, feed is 0.2mm/rev and drill point angle is 118°. Assuming 2mm clearance at approach and exit, the total drill time in seconds is (A) 35.1 (B) 32.4 (C) 31.2 (D) 30.1

In a single pass drilling operation, a through hole of 15mm diameter is to be drilled in a steel plate of 50mm thickness. Drill spindle speed is 500rpm, feed is 0.2mm/rev and drill point angle is 118°. Assuming 2mm clearance at approach and exit, the total drill time in seconds is (A) 35.1 (B) 32.4 (C) 31.2 (D) 30.1

Precision Machining Technology (MindTap Course List)

2nd Edition

ISBN:9781285444543

Author:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Publisher:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Chapter4: Drill Press

Section4.1: Introduction To The Drill Press

Problem 3RQ: Explain how the size of an upright drill press is determined.

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