Brake Work Example 13

ACT Work Keys Level: 4
NATEF Task(s): V.C.2

Problem

A technician used a micrometer to determine whether a drum can be turned on a lathe. The drum measures 9.551" and at 90° it measures 9.563". The drum specifications are:

• Machining limit 9.572
  
• Maximum diameter of 9.590

The technician estimates that it will take a total .014 of an inch to make the drum true. Can the drum be machined?

Solution

9.551 +.014 9.565

The answer is yes, because 9.565 is smaller than 9.572 so the drum can be turned.