3281_1

  • Measure pitch diameter of screw threads
  • Graduation 0.01mm
  • Non-rotating spindle
  • Ratchet stop
  • Supplied with 60° setting standards
  • Optional accessary: 55° setting standards, measuring tips (code 7381, previous page)

3281_2

Code Range L b 55* setting standard code(optional)
3281-25A 0-25mm 42 26
3281-50A 25-50mm 67 38 3281-SP1
3281-75A 50-75mm 92 50 3281-SP2
3281-100A 75-100mm 117.6 62 3281-SP3
3281-125A 100-125mm 143 70 3281-SP4
3281-150A 125-150mm 168.2 82 3281-SP5
3281-175A 150-175mm 192 94.5 3281-SP6
3281-200A 175-200mm 217 107 3281-SP7

Accuracy of micrometers with tips

Pitch Range(0-25) Range(25-50) Range(50-75) Range(75-100) Range(100-125) Range(125-100)
0.4~0.5 0.01
0.6~0.8 0.01 0.013
1~1.25 0.012 0.015 0.017 0.017
1.5~2.0 0.014 0.017 0.019 0.019 0.020 0.023
2.5~3.5 0.016 0.019 0.021 0.021 0.023 0.025
4.0~7.0 0.021 0.023 0.023 0.025 0.028