Using a metric micrometer caliper to measure the thickness of a plate, we found that graduation line 4 is visible on the sleeve, one additional 0.5 mm is visible in the sleeve, line 4 on the thimble coincides with the reading line on the sleeve. What is the measured thickness of the plate?
I know that:
Since the pitch of the spindle screw is one-half millimeter (0.5 mm), one revolution of the thimble advances the spindle toward or away from the anvil the same 0.5 mm distance.
The reading line on the sleeve is graduated in millimeters (0.1 mm) with every fifth millimeter being numbered from 0 to 25. Each millimeter is also divided in half (0.5 mm), and it requires two revolutions of the thimble to advance the spindle of 1.0 mm.
To read the micrometer, add the number of millimeters and half-millimeters visible on the sleeve to the number of hundredths of a millimeter indicated by the thimble graduation which coincides with the reading on the sleeve.
Please help. I kinda got confused
To measure the thickness of the plate using a metric micrometer caliper, follow these steps:
1. Start by looking at the sleeve of the micrometer where the measurement lines are located. Each line on the sleeve represents 0.1 mm.
2. Find the graduation line on the sleeve that aligns with the reference point on the thimble. In this case, it is graduation line 4 on the sleeve.
3. Count the additional lines visible on the sleeve after the graduation line. In this case, you mentioned that there is one additional 0.5 mm visible in the sleeve.
4. Next, look at the thimble of the micrometer. Each complete revolution of the thimble advances the spindle by 0.5 mm, which is the pitch of the spindle screw.
5. See which graduation line on the thimble coincides with the reference line on the sleeve. In this case, it is line 4 on the thimble.
6. Finally, determine the measured thickness of the plate by adding the values you obtained:
- The number of millimeters visible on the sleeve (graduation line 4) = 4 * 0.1 mm = 0.4 mm
- The additional half-millimeters visible on the sleeve = 0.5 mm
- The number of hundredths of a millimeter indicated by the thimble graduation (line 4) = 0.01 mm
So, the measured thickness of the plate would be: 0.4 mm + 0.5 mm + 0.01 mm = 0.91 mm