Question

Which of the following is true for the measurement of internal taper in the blind hole?

(a) Roller of large radius should be used

(b) No effect of roller size

(c) Roller of small radius should be used

(d) Both the rollers are of different size

This question was posed to me in examination.

The question is from Measure an Internal Taper in Blind Hole in chapter Miscellaneous Measurements (EM) of Engineering Metrology

Answer 1

Correct option is (c) Roller of small radius should be used

To explain I would say: In this method of measurement of internal taper, the radius of rollers should be small so that the contact between the flanks of sloping sides and rollers is made in a plane which is near to the base.