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As well as the raw material analysis certificate, each batch of balls can also be accompanied by a report attesting conformity to ISO 3290, DIN 5401 or ANSI/ABMA standards. On request, further documentation can also be provided, such as test reports for the various parameters checked (roughness, roundness, hardness), process evaluation (Cp and Cpk or Pp and Ppk) and initial sampling documentation.

Cert. ISO 9001-2015 Scad.09-2024

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Cert. ISO 14001-2015 scad.09-2024

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Cert. IATF 16949-2016 Scad.09-2024

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Tolerance for bearing balls according ISO 3290 : 2001 (ISO 3290 norms have been totally acknowlwdged by ABMA/ANSI (U.S.A.) and DIN.5401: 2002 (Germany) norms.

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Terms and definitions ISO 3290/DIN 5401/ABMA

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Balls tolerance DIN 5401:2002-08

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Balls tolerance ANSI-ABMA Std. 1 0A-2001 (Metal balls for unground bearings and other uses)

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Ball measure system (The following charts are designed to assist in the selection of the most appropriate Martin standard product for individual applications)

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Materials

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Diameters, weights, packing, crushing loads

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Approximate comparison chart (DIN Edition 01/78) -DIN Edition 11/93)

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Comparison chart between old Martin standards and ISO 3290:2001

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Conversion table from 64" into mm. (1/64" = mm. 0396888)

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Plastic balls

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Grades and tolerances

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Ceramic balls

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Passivation

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Corrosion resistance charts

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Hardness conversion table

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