Let's solve each of the
metric micrometer reading exercises step by step.
A
metric micrometer measures in millimeters (mm), and the reading is determined by combining:
1.
Main scale (sleeve) reading: The number on the main scale visible before the thimble.
2.
Thimble scale reading: The number on the rotating thimble that aligns with the reference line.
3.
Vernier scale (if present): Some micrometers have a vernier scale for extra precision, but most basic ones don't.
For standard metric micrometers:
- The
main scale has markings every 0.5 mm.
- The
thimble has 50 divisions, each representing 0.01 mm.
- So, total resolution = 0.01 mm.
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🔍 How to Read a Metric Micrometer:
1.
Read the main scale (sleeve): Look at the last full millimeter mark visible before the thimble.
2.
Add the thimble reading: Find which line on the thimble aligns with the horizontal line on the sleeve.
3.
Add them together.
Let’s go through each one:
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1
- Main scale: 10 mm
- Thimble: 28 × 0.01 = 0.28 mm
-
Total = 10 + 0.28 = 10.28 mm
✔ Answer: 10.28 mm
---
2
- Main scale: 15 mm
- Thimble: 47 × 0.01 = 0.47 mm
-
Total = 15 + 0.47 = 15.47 mm
✔ Answer: 15.47 mm
---
3
- Main scale: 0 mm (no full mm visible)
- Thimble: 45 × 0.01 = 0.45 mm
-
Total = 0 + 0.45 = 0.45 mm
✔ Answer: 0.45 mm
---
4
- Main scale: 0 mm
- Thimble: 10 × 0.01 = 0.10 mm
-
Total = 0 + 0.10 = 0.10 mm
✔ Answer: 0.10 mm
---
5
- Main scale: 0 mm
- Thimble: 5 × 0.01 = 0.05 mm
-
Total = 0 + 0.05 = 0.05 mm
✔ Answer: 0.05 mm
---
6
- Main scale: 5 mm
- Thimble: 30 × 0.01 = 0.30 mm
-
Total = 5 + 0.30 = 5.30 mm
✔ Answer: 5.30 mm
---
7
- Main scale: 15 mm
- Thimble: 19 × 0.01 = 0.19 mm
-
Total = 15 + 0.19 = 15.19 mm
✔ Answer: 15.19 mm
---
8
- Main scale: 0 mm
- Thimble: 35 × 0.01 = 0.35 mm
-
Total = 0 + 0.35 = 0.35 mm
✔ Answer: 0.35 mm
---
9
- Main scale: 20 mm
- Thimble: 10 × 0.01 = 0.10 mm
-
Total = 20 + 0.10 = 20.10 mm
✔ Answer: 20.10 mm
---
10
- Main scale: 0 mm
- Thimble: 4 × 0.01 = 0.04 mm
-
Total = 0 + 0.04 = 0.04 mm
✔ Answer: 0.04 mm
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✔ Final Answers:
| # | Reading (mm) |
|---|--------------|
| 1 | 10.28 |
| 2 | 15.47 |
| 3 | 0.45 |
| 4 | 0.10 |
| 5 | 0.05 |
| 6 | 5.30 |
| 7 | 15.19 |
| 8 | 0.35 |
| 9 | 20.10 |
|10 | 0.04 |
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📝 Summary of Steps:
- Always check the
main scale first (whole mm).
- Then read the
thimble scale where it lines up with the reference line.
- Multiply thimble reading by 0.01 mm.
- Add both values.
Let me know if you want these answers formatted for printing or need help understanding how to read a micrometer!
Parent Tip: Review the logic above to help your child master the concept of micrometer worksheet.
