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Which type of surface is produced in case of deviation from parallelism of spindle axis from bed in vertical axis?

Which type of surface is produced in case of deviation from parallelism of spindle axis from bed in vertical axis? Correct Answer Hyperboloid

A hyperboloid surface is produced due to any type of deviation from parallelism of axis of spindle from bed in the vertical axis. For this test, a mandrel is fitted in the taper socket of the spindle.

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What kind of surface is produced if the axis of the spindle is not parallel to the bed in horizontal direction?