The relationship between the surface roughness of the surface of the pump and the surface roughness of a health pump:

The surface roughness is the old standard of surface roughness, and their correspondence is as follows:

Surface finish 14 =Ra 0.012

Surface finish 13 =Ra 0.025

Surface finish 12 =Ra 0.050

Surface finish 11 =Ra 0.1

Surface finish 10 =Ra 0.2

Surface finish 9 =Ra 0.4

Surface finish 8 =Ra 0.8

Surface finish 7 =Ra 1.6

Surface finish 6 =Ra 3.2

Surface finish 5 =Ra 6.3

Surface finish 4 =Ra 12.5

Surface finish 3 =Ra 25

Surface finish 2 =Ra 50

Surface finish 1 =Ra 100

Ra is the symbol of the surface roughness of the United States. For example, Ra0.8um can be read as &ldquo, surface finish is 8 level &rdquo, or &ldquo, roughness is 0.8 micron &rdquo, 32Raj is surface finish 2 level, or read as surface roughness 32 micron.

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