501. The fullers are used
for necking down a piece of work.
502. A zinc diffusion process that is called
Sherardizing.
503. The lead screw of a lathe has
single start threads.
504. Lapping is an operation of
sizing and finishing a small diameter hole.
505. The machining of titanium is difficult due to
low tool-chip contact area.
506. For softer materials, the point angle of the drill is kept
less than 118°.
507. The method of centerless grinding used to produce taper that is called
end feed grinding.
508. Thread grinding requires work speed from
1 to 3 m/min.
509. Trepanning is an operation of that
producing a hole by removing metal along the circumference of a hollow cutting tool.
510. In centerless grinding, the surface speed of regulating wheel is
15 to 60 m/min.
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