Norms and standards - Spherotech

1 DIN 5401:2002-08 Grade Notional sizes Max. sizes et Dws/VDWSR fsVDwLeVDwAeIG/STGrade range/split gmm m m m m m m mover ,7 5,320,080,010,13-0,5-5 to -0,500,5 to 5G5-12,7 5,630,130,0140,25-1-5 to -101 to 5G10-25,4 9,750,250,020,5-1-9 to -101 to 9G16 a-25,4 11,40,40,0250,8-2-10 to -202 to 10G20 a-38,1 11,50,50,0321-2-10 to -202 to 10G28 a-50,8 13,70,70,051,4-2-12 to -202 to 12G40-100 1910,062-4-16 to -404 to 16G80 b-100 1420,1-4,04-12 to -404 to 12G100-150 47,52,50,15-10-40 to -10010 to 40G200-150 72,550,1510-10-60 to -10010 to 60G300 a-25,4 70100,2-2020-60 to -20020 to 60G300 c25,450,8 105150,2-3030-90 to -30030 to 90G30050,875 140200,2-4040-120 to -40040 to 120G500 d-25,4 7525--5050-50050G50025,450,8 112,525--7575-75075G50050,875 15025--100100-1000100G50075100 187,532--125125-1250125G500100125 22538--150150-1500150G500125150 262.

2 544--175175-1750175G600 dAll 200---400--0-G700 dAll 1000---2000--0- Norms and standards DIN Deutsches Institut f r Normung DIN Deutsches Institut f r Normung 5401:2002-08 For the application of this norm the following terms apply:Terms:Explanation:Notional diameter of the balls (Dw)The diameter fi gure used for the general description of a ball diameter of a ball (Dws)The distance between parallel levels that touch the surface of the diameter of a ball (Dwm)Arithmetic mean calculated from a ball s largest and smallest individual diameter (Dws).Ball diameter fl uctuation (VDws)Difference between a ball s largest and smallest individual diameter (Dws).Ball shape deviation (tDws)Radial distance in each equatorial level between two concentric circles that enclose the profi le with the smallest possible gap, measured using the least squares collocation method (LSC).

3 BatchA specifi c quantity of balls produced under the same conditions that have largely similar ball diameter of a batch (DwmL)Arithmetic mean calculated from the largest/smallest average ball diameter (Dwm) in a diameter variation within a batch (VDwL)Difference between the largest/smallest average ball diameter (Dwm) in a : This parameter applies only to balls in classes G3 to G200, excluding tolerance (ST)Range in which DwmL is allowed to fl uctuate within a : The grade tolerance (ST) is identical in its amount to grade interval (IG). Ball diameter variation within a grade (VDwa)Difference between the largest/smallest average ball diameter (Dwm) within a : This parameter applies only to balls in classes G300 to G700 and interval (IG)Amount in which the permitted deviation of the ball s notional diameter is evenly (G)Specifi c combination of tolerances of size, shape, surface roughness and diameter : Each class is identifi ed with a number preceded by the letter G.

4 For conversion of the accuracy class codes the versions of the standards from 1978 to 1993 and 2002, see appen-dix (S)Distance of (in the case of VDwL) a batch s or (in the case of VdwA) part of a batch s average ball diameter from the ball's notional diameter (Dw), rounded to a whole-number multiple of the grade interval (IG).Maximum deviationIn terms of this norm, the maximum limiting deviation of the average ball diameter (Dwm) from the ball s notional diameter (Dw). DIN Deutsches Institut f r Normung 5401:2002-08 For the application of this norm the following terms apply:Terms:Explanation:Surface roughness (Ra)In terms of this norm, any deviations from a geometrically perfect surface, with shape deviati-on and undulation not being : The limits indicated in table 3 relate to the arithmetic average of the deviation of the roughness profi le from the middle line (Ra).

5 Undulation (MDw )In terms of this norm, chance or periodic deviations of the ball surface from the ideal ball : Undulation should be measured using the vibration velocity method and sub-divided into undulation bands using Fourier analysis.