New-Kitchen-Knife-sharpener-diamond-whetstone-80-120-200-400-500-600-800-1000-1500

Surface finish sandpaper grit chart

Upmold collected these data for your reference for plastic injection mold quality of surface polishing, how to control or inspect the polishing quality of molds, also you can download it.

  • Standard Sandpaper & Whetstone  Grit Sizes Range of Belts Correspond Chart

Standard Whetstone

Standard Sandpaper

Grit Size

Roughness (µm)

Grit Size

Roughness (µm)

F220

P240

58.5±2.2

F230

55.7±3.0

P280

52.2±2.0

F240

47.5±3.0

P320

46.2±1.5

F280

39.9±1.5

P360

40.5±1.5

F300

P400

35.0±1.5

F320

32.8±1.5

P500

30.2±1.5

F360

26.7±1.5

P600

25.8±1.0

F400

21.4±1

P800

21.8±1.0

F500

17.3±1

P1000

18.3±1.0

F600

137.±1

P1200

15.3±1.0

F800

11.0±1

P1500

12.6±1.0

F1000

9.1±1

P2000

10.3±0.8

F1200

7.6±0.5

P2500

8.4±0.5

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