1 Langkah langkah penggunaaan Micrometer

mikrometer

1. SUB BAB 1.2. MICROMETER
9/4/2016 Micrometer 1
Disadur oleh:
Dr. Ir. Bambang Sugiyono Agus Purwono, M Sc
Jurusan Teknik Mesin
Politeknik Negeri Malang

2. 9/4/2016 2 Micrometer
POKOK BAHASAN
INSIDE MICROMETER
MICROMETER
OUTSIDE MICROMETER
CONTOH PENGUKURAN
1
PENDAHULUAN
2
3
4
5
6 RINGKASAN DAN SOAL LATIHAN

3. PENGGUNAAN MICROMETER
Outside dan inside micrometer ialah alat presisi, masing-masing
untuk mengukur diameter luar dan dalam. Alat ini lebih teliti dari
pada vernier caliper, dapat mengukur sampai ketelitian 0,01 mm.
9/4/2016 Micrometer 3

4. INSIDE MICROMETER
Purpose:
(1) Precisely measures holes and slots
(2) Range: 1.5 in – 6.5 in
Extensor Change:
(1)Select appropriate size
(2)Insert extensor
(3)Tighten
9/4/2016 Micrometer 4

5. INSIDE MICROMETER
Use:
(1)Adjust length to approximate hole size
(2)Insert
(3)Rotate micrometer—it should barely touch
(4)Remove and repeat if necessary
(5)Read like an ordinary micrometer

Twist to Adjust Length
9/4/2016 Micrometer 5

6. INSIDE MICROMETER
9/4/2016 Micrometer 6

7. INSIDE MICROMETER
9/4/2016 Micrometer 7

8. OUTSIDE MICROMETER
9/4/2016 Micrometer 8
• Measures accurately to (.001).
• Vernier micrometers measure to (.0001).

9. 9/4/2016 Micrometer 9
PENGGUNAAN OUTSIDE MICROMETER

10. 9/4/2016 Micrometer 10
PENGGUNAAN OUTSIDE MICROMETER
Whole millimeter marks 10 x 1 mm = 10.00 mm
Half millimeter marks 1 x .50 mm = .50 mm
Thimble Reading 16 x .01 mm = .16 mm

Reading 10.66 mm

11. CONTOH PEMBACAAN OUTSIDE MICROMETER
9/4/2016 Micrometer 11

12. 9/4/2016 Micrometer 12
•Removing Play
- Back off the thimble.
- Insert a C-spanner into slot or hole of adjusting nut.
- Turn adjusting nut clockwise until play between threads
is eliminated.
Micrometer Adjustments

13. 9/4/2016 Micrometer 13
• Adjusting Accuracy
- Clean measuring faces and check for damage.
- Closes faces.
- Turn sleeve until index line on sleeve matches zero (0) line on thimble.
- Recheck accuracy by opening and closing faces. Rating should be zero (0).
Micrometer Adjustments

14. Care of the Micrometer
9/4/2016 Micrometer 14
• Close faces carefully to avoid damage.
• Keep micrometer clean. Wipe with oily cloth. Oil threads.
• Not too much pressure.
• Clean face of anvil and spindle before use.
• Check for accuracy. Close faces - should read zero (0).
• Don’t lay unit where it could fall.
• Don’t twirl micrometer to open or close a great distance.
• Clean and oil for long term storage. Place in box.

15. DIGITAL MICROMETERS
9/4/2016 Micrometer 15
• Modern Version - Results Displayed Electronically
• Delicate instrument - handle with care.
1. How to Read Digital Micrometers
a.Before taking reading, do the following:
- Turn display on.
- Press button to activate desired scale.
- Slowly close micrometer until ratchet engages.
- Zero micrometer by pressing Origin or Set button.

b.For thickness reading:
- Open micrometer.
- Insert sample.
- Slowly close micrometer until ratchet engages.
- Read thickness on digital display.

16. PEMBACAAN SKALA PADA VERNIER CALIPER
9/4/2016 Micrometer 16
•When finished, open slightly.
•Never store with spindle closed
•Turn instrument off and store in protective case.
2. Proper Care of Digital Micrometers

17. 9/4/2016 Micrometer 17
SOAL-SOAL LATIHAN
1
6.57 mm
2
4.07mm
3
1,02 mm
10.97mm
4

18. SOAL-SOAL LATIHAN
9/4/2016 Micrometer 18
Soal no. 9
A. 3.51cm
B. 3.57cm
C. 3.62cm
D. 3.642cm
E. 3.67cm
0 5 10
3 4
overlap
3 4

19. 9/4/2016 Micrometer 19