7.4 CMQ242 JOBAID all Surface Plate Gages 508.pptx

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1. CMQ242 Geometric Dimensioning and Tolerancing (GD&T) and Measuring Techniques Surface Plate Gauges Job Aid

2. Surface gauge with indicator Height gage Surface Plate Surface Plate Gages

3. Authenticated flat surface, used for measurement Used as a plane of reference Surface plate gages, used on surface plate Grades AA, A, and B Surface Plate

4. Make sure your surface plate is clean and free of cracks and damage. Surface Plate Demonstration

5. Surface gauge with indicator Surface Plate Gages

6. Balanced or bilateral dials Has plus or minus dial Perform bilateral measurements Compare parts to the master If dial reads less than zero, compared part is smaller than master If dial reads more than zero, compared part is larger than master Mechanical Indicator

7. Step 1: Place your indicator on your gauge block stack. (1.932) Mechanical indicator Step by Step

8. Step 2: Turn the thumb wheel to zero the indicator Mechanical indicator Step by Step

9. Step 3: Turn the thumb wheel one full rotation back to zero. Mechanical indicator Step by Step

10. Step 4: The gauge is now zeroed. Mechanical indicator Step by Step

11. Step 5: Slide the gauge from the gauge block stack to the shouldered stud. The gauge reads .001 so our measurement is 1.930 + .001 = 1.931 Mechanical indicator Step by Step

12. Height gage Used to measure height Surface Plate Gages

13. Step 1: Zero the gauge. Height Gauge Step by Step

14. Zero Step 2: Verify the gauge is zeroed against the surface plate. Height Gauge Step by Step

15. Step 3: Place the part under the measuring surface and use the thumb wheel to lower the measuring surface onto the part. Height Gauge Step by Step

16. 1.931 1.000 .900 .031 Step 5: Read the measurement. Height Gauge Step by Step

17. If you have any questions please go to the QC COP!