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<p><strong>1] Only A, B and D2] Only B, C and D </strong></p> <p><strong>3] Only A, B and C4] All of these</strong></p>
All of the above
I am also choosing D All of the Above
Reaming- taking material out of a hole this can be done on a drill press, however a milling or lathe would be a much better machine to accomplish the job
Countersink - to make screws flush or below surface of part -also done with a drill press, if a part is already set up in a milling machine I would continue finishing the the job on that machine
Spot Facing - A spot face or spot face is a machined feature in which a certain region of the work piece (a spot) is faced, providing a smooth, flat, accurately located surface. - it can be done with a drill press, but more likely done with a milling machine
Thread Tapping -to cut treads for screws - can be used in a drill press it also can be done on a milling machine or done by hand (accurate actions needed to keep the bit in a90 degree angel)... yes it is nice to cut one or two holes per hand ... but not practical for a tool and die to cut10 or more hands per hand, it is very time consuming and time is money!
A. Reaming
B. Countersinking
C. Spot Facing
D. Thread tapping
C4] All of these
We can make all the above mentioned operation with a Drill M/C
A, B and C, , Thread tapping is theoretical possible and is done with machinery's for large diameters, but by hand you have more feeling with what you do, and it isn't hard wit a sharp tapper
