Question

What is the maximum error for perpendicularity of spindle sleeve with a base plate?

(a) 0.15/1000 mm for plane vertical to plane passing through the axes of both spindle and column

(b) 0.15/1000 mm for plane horizontal to plane passing through the axes of both spindle and column

(c) 0.5/1000 mm for plane vertical to plane passing through the axes of both spindle and column

(d) 0.5/1000 mm for plane horizontal to plane passing through the axes of both spindle and column

The question was asked in an interview for internship.

I'm obligated to ask this question of Alignment Tests on Pillar Type Drilling Machine topic in division Machine Tool Metrology of Engineering Metrology

Answer 1

Right answer is (b) 0.15/1000 mm for plane horizontal to plane passing through the axes of both spindle and column

For explanation I would say: The error should not exceed 0.25/1000 mm for plane vertical to plane passing through the axes of both spindle and column and the sleeve should be inclined toward column only ; and 0.15/1000 mm for plane horizontal to plane passing through the axes of both spindle and column.