Manual Drive Train & Axles
Work Example 7

WorkKey Level: 4
NATEF Automotive Tasks: III.E.1.8

You are checking backlash in four spots on the ring gear and you find the following four measurements:  0.004”, 0.006”, 0.008”, and 0.004”. What is the variation in the backlash readings? If the backlash spec is 0.005” to 0.008”, are your readings within specifications? If they are not within specs, how far out are they?

Solution:

The variation in backlash is the range (maximum measurement – minimum measurement):
0.008" – 0.004" = 0.004" variation

The readings are not within specs.

They are out of specs by (0.005" – 0.004") = 0.001".