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  • US manufacturer of precision cylindrical roller and ball thrust bearings, radial roller bearings, journal roller bearings and custom bearings with capabilities to manufacture, inventory and deliver large and small runs, serving large and small scale distributors and OEMs.

  • Loose Ball Bearings

    Precision & Sizing Balls

    We have been a supplier of loose bearing balls for almost 100 years.  These balls can be supplied in accordance with the applicable Mil Spec with chemical and physical certifications if required.  They are available in all grades, sizes and materials, including chrome steel, stainless steel, carbon steel, brass, bronze, tungsten carbide, aluminium, K-Monel, glass, plastic and ceramic.  Grades range from Grade 3  to Grade 1000.  We stock a large inventory of precision sizing balls, ranging in size from 1/64″ to over 1″ in diameter and everything in between, carried out to as many as 5 decimal places.  Most are available for immediate delivery.

    The following table is taken from the ABMA Standards and may serve as a general guide for quality specifications:

    Grade

    Deviation From

    Spherical Form

    Surface Roughness 

    Arithmetrical Average

    Basic Diameter

    Tolerance

    3

    3µ”

    .000003″

    5µ” AA

    .0000005″ AA

    ± 30µ

    ± .000030″

    5

    5µ”

    .000005″

    8µ” AA

    .0000008″ AA

    ± 50µ

    ± .000050″

    10

    10µ”

    .000010″

    1µ” AA

    .000001″ AA

    ± 100µ

    ± .0001″

    24

    24µ”

    .000024″

    2µ” AA

    .000002″ AA

    ± 100µ

    ± .0001″

    48

    48µ”

    .000048″

    3µ” AA

    .000003″ AA

    ± 200µ

    ± .0002″

    50

    50µ”

    .000050″

    3µ” AA

    .000003″ AA

    ± 300µ

    ± .0003″

    100

    100µ”

    .0001″

    5µ” AA

    .000005″ AA

    ± 500µ

    ± .0005″

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