Question

In how many planes, they test for parallelism of the spindle axis with its vertical movement is performed?

(a) In two planes 60° to each other

(b) In two planes 30° to each other

(c) In two planes 45° to each other

(d) In two planes 90° to each other

I had been asked this question during an interview for a job.

I'd like to ask this question from Alignment Tests on Pillar Type Drilling Machine in portion Machine Tool Metrology of Engineering Metrology

Answer 1

The correct option is (d) In two planes 90° to each other

Best explanation: The test for parallelism of the spindle axis with its vertical movement is performed in two planes right angle to each other. The dial indicator is fixed on the table with its feeler touching the mandrel and test mandrel is fitted in the tapered hole of the spindle.