Question

Which of the following is true for eccentricity?

(a) Half the radial run-out

(b) Half the axial run-out

(c) Equal to the radial run-out

(d) Equal to the axial run-out

This question was posed to me during an internship interview.

My enquiry is from Sources of Errors in Manufacturing Gears topic in division Measurement and Testing of Gears of Engineering Metrology

Answer 1

The correct option is (a) Half the radial run-out

Best explanation: Radial runout is the runout measured along a perpendicular to the rotation axis. Eccentricity is half the radial run-out.