0 0 votes In a single pass drilling operation, a through hole of $15$ mm diameter is to be drilled in a steel plate of $50$ mm thickness. Drill spindle speed is $500$ rpm, feed is $0.2$ mm/rev and drill point angle is $118^{\circ}$. Assuming $2$ mm clearance at approach and exit, the total drill time (in seconds) is $35.1$ $32.4$ $31.2$ $30.1$ Materials, Manufacturing and Industrial Engineering gateme-2012 materials-manufacturing-and-industrial-engineering + – Andrijana3306 345 views answer comment Share Follow Add Sync Questions 0 reply Please log in or register to add a comment.
