Home |  Profile |  Quality |  Infrastructure |  Contact |  Query |  Site Map |  E-mail   Stainless Steel Balls Non-Ferrous Brass Balls Bearing Balls Bicycle Balls Grinding media Burnishing Media Why MBI?  |  Manufacturing Process  |  Glossary  |  Ball Applications  |  Grades  |  Composition  |  Social Responsibility  |  Clients   Grades / Tolerances     ABMA (American Bearing Manufacturers Association) Standards, USA DIN 5401 Specifications, Germany BIS Standards, India   ABMA Standards Master Table of Ball Grades and Tolerances Grade Diameter Tolerance/Ball "V" Block Out-of-round in 120 Angle Diameter Tolerance Per Unit Container Basic Diameter Tolerance Marking Increments Maximum Surface Roughness   Inch Inch Inch Inch Inch Micro - inch "AA" (1) 3 0.000003 0.000003 0.000005 ± 0.00003 0.000003 0.5 (2) 5 0.000005 0.000005 0.00001 ± 0.00005 0.000005 0.7 (2) 10 0.000010 0.000010 0.00002 ± 0.0001 0.000010 1.0 (2) 15 0.000015 0.000015 0.00003 ± 0.0001 0.000015 1.2 (2) 25 0.000025 0.000025 0.00005 ± 0.0001 0.000025 1.5 (2) 50 0.00005 0.00005 0.0001 ± 0.0002 0.00005 3.0 100 0.0001 0.0001 0.0002 ± 0.0005 0.0001 5.0 200 0.0002 0.0002 0.0004 ± 0.0010 0.0002 8.0 300 0.0003 0.0003 0.0006 ± 0.0015 0.0003 N.A. 500 0.0005 0.0005 0.001 ± 0.002 0.0005 N.A.               1000 0.001 0.001 0.002 ± 0.005 N.A. N.A. 2000 0.002 0.002 0.004 ± 0.005 N.A. N.A. 3000 0.003 0.003 0.006 ± 0.005 N.A. N.A. [1] "AA" Arithmetical Average [2] These grades may carry waviness requirements DIN 5401 Specifications for Balls Dimensional and Form Accuracy Class Basic Diameter Basic Tolerance Grade Tolerance Permissible Out-of-Roundness   mm μm μm μm I Up to 10 ± 10.25 0.05 0.25 II Up to 25 ± 10.5 1 0.5 III Up to 25 ± 11 2 1 Over 25 to 50 ± 13.5 3 1.5 Over 50 to 75 ± 14 4 2 Over 75 to 100 ± 17.5 5 2.5 Over 100 to 125 ± 21 6 3 IV Up to 10 ± 14 4 2 V Up to 25 75 50 25 Over 25 to 50 ± 113 75 38 Over 50 to 75 ± 150 100 50 Over 75 to 100 ± 188 125 63 Over 100 to 125 ± 225 150 75 VI   ± 200 400   Material: Rolling Bearing Steel Hardness: HRC 63 ± 3 Finish: Ground and Polished BIS Standards (IS:2898-1976) Form and Surface Roughness Tolerances Grade Ball Diameter Variation VDWS Deviation from Spherical Form Surface Roughness Ra   M a x i m u m                    V a l u e s                    i n                    Micrometers 3 0.08 0.08 0.012 5 0.13 0.13 0.02 10 0.25 0.25 0.025 16 0.4 0.4 0.032 20 0.5 0.5 0.04 28 0.7 0.7 0.05 40 1 1 0.08 100 2.5 2.5 0.125 200 5 5 0.2     Stainless Steel Balls  |  Non-Ferrous Brass Balls  |  Bearing Balls  |  Bicycle Balls  |  Grinding Media  |  Burnishing Media Why MBI?  |  Manufacturing Process  |  Glossary  |  Ball Applications  |  Grades/Tolerances  |  Chemical Composition Home  |  Profile  |  Quality  |  Infrastructure  |  Clients  |  Contact  |  Query  |  Site Map  |  Social Responsibility  |  E-mail   Copyright © 2005-2008 Miniature Ball Industries. All Rights Reserved. Web design, Web hosting & Search engine optimization by Teknologie Koncepts