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Micrometer

  • Used for zero setting of inside micrometers and three point internal micrometers.
  • Criterion DIN2250(1).
  • A: Uncertainty of marked diameter
  • B: Cylindric error
  • C: Error between actual size and nominal value
Micrometer ring gauge
Size A B C
2.5mm±0.0015mm0.0010mm±0.01mm
4mm±0.0015mm0.0010mm±0.01mm
5mm±0.0015mm0.0010mm±0.01mm
6mm±0.0015mm0.0010mm±0.01mm
8mm±0.0015mm0.0010mm±0.01mm
10mm±0.0015mm0.0010mm±0.01mm
12mm±0.0015mm0.0010mm±0.01mm
16mm±0.0015mm0.0010mm±0.01mm
20mm±0.0015mm0.0010mm±0.01mm
25mm±0.0015mm0.0010mm±0.01mm
30mm±0.0015mm0.0010mm±0.01mm
40mm±0.0015mm0.0010mm±0.01mm
50mm±0.0015mm0.0015mm±0.02mm
62mm±0.0015mm0.0015mm±0.02mm
70mm±0.0015mm0.0015mm±0.02mm
75mm±0.0015mm0.0015mm±0.02mm
87mm±0.0015mm0.0015mm±0.02mm
100mm±0.0015mm0.0015mm±0.02mm
150mm±0.0020mm0.0025mm±0.02mm
200mm±0.0020mm0.0025mm±0.02mm
225mm±0.0020mm0.0025mm±0.02mm
250mm±0.0020mm0.0025mm±0.02mm
275mm±0.0020mm0.0025mm±0.02mm
300mm±0.0020mm0.0025mm±0.02mm
Micrometer ring gauge (Inch)
Size A B C
0.16"±0.00006"0.00004"±0.0004"
0.2"±0.00006"0.00004"±0.0004"
0.275"±0.00006"0.00004"±0.0004"
0.35"±0.00006"0.00004"±0.0004"
0.425"±0.00006"0.00004"±0.0004"
0.5"±0.00006"0.00004"±0.0004"
0.65"±0.00006"0.00004"±0.0004"
0.8"±0.00006"0.00004"±0.0004"
1"±0.00006"0.00004"±0.0004"
1.2"±0.00006"0.00004"±0.0004"
1.6"±0.00006"0.00004"±0.0004"
2"±0.00006"0.00006"±0.0008"
2.5"±0.00006"0.00006"±0.0008"
2.8"±0.00006"0.00006"±0.0008"
3"±0.00006"0.00006"±0.0008"
3.5"±0.00006"0.00006"±0.0008"
4"±0.00006"0.00008"±0.0008"
6"±0.00010"0.00008"±0.0008"
8"±0.00010"0.00008"±0.0008"
Reference:
Inside MicrometerDigital Internal MicrometerThree Point Micrometer

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