Manufacturing And Production Technology
Which of the following statement is wrong as regard to down milling?

It can not be used on old machines due to backlash between the feed screw of the table and the nut.
The surface milled appears to be slightly wavy.
The chips are disposed off easily and do not interfere with the cutting.
The coolant can be poured directly at the cutting zone where the cutting force is maximum.

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Manufacturing And Production Technology
In plunge grinding

The work rotates in a fixed position as the wheel feeds to produce cylinders longer than the width of wheel face
The work is reciprocated as the wheel feeds to produce cylinders longer than the width of wheel face
The work rotates in a fixed position as the wheel feeds to produce cylinders equal to or shorter than the width of wheel face
The work is reciprocated as the wheel feeds to produce cylinders shorter than the width of wheel face

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