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    Chrome Steel Balls Specification

    Chrome Steel 52100 is a universal material for many applications. Chrome steel balls have an excellent surface quality and high load bearing. TRD produces balls that through statistical process control, assures tolerance accuracy, fine surface finish and a consistent high quality. Our chrome steel balls are available in fractional, decimal and millimeter sizes.

    The specification of bearing steel ball:

    Diameter (d)

    Diameter (d)

    Inch

    Millimeter

    Inch

    Millimeter

    2
    8.5
    3/32
    2.381
    11/32
    8.731
    2.5
    9
    3
    23/64
    9.132
    3.1
    3/8
    9.525
    1/8
    3.175
    13/32
    10.319
    3.5
    15/32
    11.006
    5/32
    3.969
    7/12
    11.113
    4
    31/64
    12.303
    4.5
    1/2
    12.70
    3/16
    4.763
    9/16
    14.28
    5
    9/32
    15.81
    5.5
    5/8
    15.875
    7/32
    5.556
    11/16
    17.463
    15/64
    5.953
    18
    6
    23/32
    18.256
    1/4
    6.35
    3/4
    19.05
    6.5
    25/32
    19.844
    7
    20
    9/32
    7.144
    27/32
    21.431
    7.5
    7/8
    22.225
    5/16
    7.938
    31/32
    24.606
    8
    1
    25.4
    5/8
    15.8750
    1 3/4
    44.4500
    21/32
    16.6688
    45.0000
    11/16
    17.4625
    1 7/8
    47.6250
    23/32
    18.2562
    50.0000
    3/4
    19.0500
    2    
    50.8000
    13/16
    20.6375
    2 1/8
    53.9750
    7/8
    22.2250
    55.0000
    29/32
    23.0188
    2 1/4
    57.1500
    15/16
    23.8125
    60.0000
    1     
    25.400 
    2 3/8
    60.3250
    1 1/16
    26.9875
    2 1/2
    63.5000
    1 1/8
    28.5750
    65.0000
    30     
    2 3/4
    69.8500
    1 3/16
    30.1625
    70.0000
    1 1/4
    31.7500
    75.0000
    32     
    3    
    76.2000
    1 5/16
    33.3375
    80.0000
    34     
    3 1/2
    88.9000
    1 3/8
    34.9250
    90.0000
    35     
    100.0000
    Grade of tolerance and technology requirement
    Grade
    Ball diameter variation Spherical deviation Ball surface roughness Ball diameter variation Basic diameter tolerance
    Vdws ?Sph Ra Vdwl Tdn
    Not exceed not over
    um
    10 0.25 0.25 0.025 0.5 *
    16 0.4 0.4 0.032 0.8 *
    20 0.5 0.5 0.05 1 *
    28 0.7 0.7 0.05 1.5 *
    40 1.0 1.0 0.08 2 *
    60 1.5 1.5 0.10 3 *
    100 2.5 2.5 0.125 5 12.5
    200 5 5 0.2 10 25
    500 13 13 * 25 50
    1000 25 25 * 50 125
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