1. 1 VERNIER CALIPERS 2. USING MEASURING INSTRUMENTS PROPERLY
Faces for inside measurements
Caliper jaw
Scale
Depth bar
Depth reference plane
Caliper scale
Finger rest
Vernier scale
Sliding jaw
Faces for outside measurements
Lockscrew

2. 1) Checking the instrument
2. USING MEASURING INSTRUMENTS PROPERLY
1) Checking the instrument
(1) Confirm that the lockscrew is loose.
(2) Wipe the measuring faces and sliding faces.
(3) There is not a gap between the measuring faces.
(4) The zero points on the scales line up.
Gap
Zero points

3. 2) Measuring an object 2. USING MEASURING INSTRUMENTS PROPERLY
Big object
Small object
Measuring Depth
Inside measurement

4. 3) Reading the scale 2. USING MEASURING INSTRUMENTS PROPERLY
Main scale 3 4 5 6 2 8 10
Secondary scale
36mm
The 8 graduation
36mm mm = 36.40mm

5. 2 MICROMETER 2. USING MEASURING INSTRUMENTS PROPERLY Anvil Spindle
Sleeve
Ratchet stop
Clamp
Thimble
Frame

6. 1) Checking the instrument
2. USING MEASURING INSTRUMENTS PROPERLY
1) Checking the instrument
(1) Confirm that the clamp is loose.
(2) Wipe the entire instrument.
(3) Turn the ratchet stop and check the spindle rotation.
(4) Check the zero point.
(5) Adjust the zero point.
Zero point

7. 2) Measuring an object 2. USING MEASURING INSTRUMENTS PROPERLY
Ratchet stop
Use a micrometer stand to avoid
the effects of heat transferred from your hand.

8. 3) Reading the scale 2. USING MEASURING INSTRUMENTS PROPERLY
Main scale
Secondary scale (Thimble) 45 40 75 80
81.0mm mm =8.45mm

9. 2. USING MEASURING INSTRUMENTS PROPERLY
3 DIAL GAUGE

10. 1) Check/Measurement 2. USING MEASURING INSTRUMENTS PROPERLY 1mm

11. 2. USING MEASURING INSTRUMENTS PROPERLY
Measuring deflection

12. 2. USING MEASURING INSTRUMENTS PROPERLY
4 CYLINDER GAUGE

13. 2. USING MEASURING INSTRUMENTS PROPERLY
1) Measurement
Wear Amount

14. Clearance 2. USING MEASURING INSTRUMENTS PROPERLY
Difference = Clearance
Piston diameter