SPI Micro Surface Finish Comparator Plates

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SPI

SPI Micro Surface Finish Comparator Plates


Material: Solid Electroformed Nickel


Features:

  • Molded into metal frames
  • Lightweight (2.5 oz) in fitted wallets
  • Fits right into pocket - 2-1/16" L x 5" W overall size
  • Individual specimens: 5/8" L x 1" W
  • Used by Q,C. inspectors, line supervisors, machinists, draftsmen, designers, etc.
  • Wallets contain durable instruction cards allowing user to assess roughness by sight and touch
  • Plates are marked in AA (micro inches), Ra (μm) and Rz as well as "N" numbers
  • All plates conform to SAE and MIL Specs. Manufactured to ANSI-B-46.1-1978. Military Standard 45662.


Specifications:

Item # Machining Method No. of
Specimens
Ra μm Measuring Range Aaμ" N#
14-440-2 Surface Grinding 8 0.025 - 3.2 1, 2, 4, 8, 16, 32, 63, 125

1-8
14-441-0 Cylindrical Grinding 8 0.025 - 3.2 1, 2, 4, 8, 16, 32, 63, 125

1-8
14-442-8 Face Turning (flat) 8 0.4 - 50 16, 32, 63, 125, 250,
500, 1000, 2000
5-12
14-443-6 Cylindrical Turning 8 0.4 - 50 16, 32, 63, 125, 250,
500, 1000, 2000
5-12
14-444-4 End Milling 8 0.4 - 50 16, 32, 63, 125, 250,
500, 1000, 2000
5-12
14-445-1 Reaming & Drilling 8 0.4 - 12.5 Reaming 16,32,63,125
Drilling 63,125,250,500
5-10
14-446-9 Horizontal Milling 8 0.4 - 50 16, 32, 63, 125, 250,
500, 1000, 2000
5-12
14-447-7 Shaping or Planing 8 0.8 - 100 32, 63, 125, 250,
500, 1000, 2000, 4000
6-13
14-448-5 Belt Sanding 6 0.10 - 3.2 4, 8, 16, 32, 63, 125

3-8
14-449-3 Vertical Grinding 6 0.2 - 6.3 8, 13, 62, 63, 125, 250

4-9
14-450-1 Honing 6 0.05 - 1.6 2, 4, 8, 16, 32, 63

2-7
14-451-9 Polishing 5 0.0125 - 0.20 0.5, 1, 2, 4, 8

0-4