In manual programming and tape preparation for an NC drilling machine, the spindle speed was coded as S 684 (using the magic-three code). The spindle speed in rpm will be:

In manual programming and tape preparation for an NC drilling machine,

1.	In manual programming and tape preparation for an NC drilling machine, the spindle speed was coded as S 684 (using the magic-three code). The spindle speed in rpm will be:
A.	684
B.	68.4
C.	840
D.	6840
Answer» B. 68.4

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In manual programming and tape preparation for an NC drilling machine, the spindle speed was coded as S 684 (using the magic-three code). The spindle speed in rpm will be:

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