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    Form and Surface Roughness Tolerances

    Form and Surface Roughness Tolerances
     Tolerance values in micrometers


     Grade

    Ball Gauge

    Ball Subgauge

    Ball Diameter Variation
     VDWS
     max.

    Ball Lot Diameter Variation
     VDWL
     max.

    Deviation from Spherical Form
     △RSW
     max.

    Surface Roughness
     Ra
     max.

    G5

    ±5

    ±0.4

    0.13

    0.25

    0.13

    0.014

    G10

    ±10

    ±0.4

    0.25

    0.5

    0.25

    0.020

    G16

    ±10

    ±0.8

    0.4

    0.8

    0.4

    0.025

    G20

    ±10

    ±0.8

    0.5

    1

    0.5

    0.032

    G24

    ±12

    ±0.8

    0.6

    1.2

    0.6

    0.040

    G28

    ±12

    ±0.8

    0.7

    1.4

    0.7

    0.050

    G40

    ±16

    ±1.6

    1

    2

    1

    0.080

    G60

    ±16

    ±2.4

    1.5

    3

    1.5

    0.1

    G100

    ±40

    ±4

    2.5

    5

    2.5

    0.125