Quality

SHANDONG SDBALLS INDUSTRY CORP LTD.

Standards

Shandong SDBALLS Industry Co., LTD is established on the basis of Shengdian Steel ball Factory. With more than 30 years of production experience.

ISO 3290-1 International Standards

ISO3290-1:2014 STANDARD (STEEL BALLS)

Precision GradeVariation of ball diameter (VDws) (μm) (a)Deviation from spherical form (tDw) (>μm) (a)Surface roughness (Ra) (μm) (a)Variation of ball Lot diameter (VDwL) (μm)Gauge interval (IG)Description of preferred gaugeSub gauge intervalDescription of subg au ges (SG)
30.080.080.010.130.5-5/-0.5,0,+0.5/+50.1-0.2,-0.1,0,0.1,0.2
50.130.130.0140.251-5/-1,0,+1/+50.2-0.4,-0.2,0,0.2,0.4
100.250.250.020.51-9/-1,0,+1/+90.2-0.4,-0.2,0,0.2,0.4
160.40.40.0250.82-10/-2,0,+2/+100.4-0.8,-0.4,0,0.4,0.8
200.50.50.03212-10/-2,0,+2/+100.4-0.8,-0.4,0,0.4,0.8
240.60.60.041.22-12/-2,0,+2/+120.4-0.8,-0.4,0,0.4,0.8
280.70.70.051.42-12/-2,0,+2/+120.4-0.8,-0.4,0,0.4,0.8
40110.0624-16/-4,0,+4/+160.8-1.6,-0.8,0,0.8,1.6
601.51.50.0836-18/-6,0,+6/+181.2-2.4,-1.2,0,1.2,2.4
1002.52.50.1510-40/-10,0,10/402-4,-2,0,2,4
200550.151015-60/-15,0,15/603-6,-3,0,3,6

A.F.B.M.A International Standards

A.F.B.A STANDARDS (U.S.A)

AFBMA GradesVariation of ball diameter/RoundnessLot Diameter VariationBasic Diameter ToleranceMaximum IncrementsSurface Roughness
 INCHESμmINCHESμmINCHESμmINCHESμmINCHESμm
30.0000030.07620.0000050.127±0.000030.7620.0000100.2540.00000050.0127
50.0000050.1270.0000100.245±0.000051.270.0000100.2540.00000080.02032
100.0000100.2540.0000200.508±0.000102.540.0000100.2540.0000010.0254
150.0000150.3810.0000300.762±0.000102.540.0000100.2540.0000010.0254
160.0000160.40640.0000320.8128±0.000102.540.0000100.2540.0000010.0254
240.0000240.60960.0000481.2192±0.000102.540.0000100.2540.0000020.0508
250.0000250.6350.0000501.27±0.000202.540.0000100.2540.0000020.0508
450.0000451.21920.0000962.4384±0.000305.080.0000501.270.0000030.0762
500.0000501.270.0001002.54±0.000507.620.0000501.270.0000030.0762
1000.0001002.540.0002005.08±0.0010012.70.0001002.540.0000050.127
2000.0002005.080.00040010.20±0.0010025.40.0002005.080.0000080.2032
3000.0003007.620.00040015.24±0.0010025.40.0003007.62
5000.00050012.700.00100025.40±0.0020050.80.00050012.70
10000.00100025.400.00200050.80±0.00500127.00.00100025.40
20000.00200050.800.004000101.60±0.00500127.00.00200050.80
30000.00300076.200.006000152.40±0.00500127.00.00300076.20

Din 5401 International Standards

DIN 5401:2002-08(GERMAN STANDARDS)

GradeClassNominal diameter Dw(mm)Limit deviationsBall diameter variationRoundnessSurface roughnes s(6)Lot diameter variation -5Subgauge intervaSubgauges(μm)(7)
  fromto(um)(s)VDws Max(um)tDws Max (um)Ra Max(um)VDwL/A Max(um)IG, ST (um)(um)
G312.7±5,320.080.080.010.13(L)0.5from-5 to-0,50from+0.5 to+5
G5I12.7±5.630.130.130.0140.25(L)1from-5 to-10from+1to+5
G10II25.4±9.750.250.250.020.50(L)1from-9to-10from+1 to+9
G16(1)III25.4±11.40.40.40.0250.80(L)2from-10 to-20from+2 to+10
G20(1)III38.1±11.50.50.50.0321.0(L)2from-10 to-20from+2 to+10
G28(1)III50.8±13.70.70.70.051.4(L)2from-12 to-20from+2 to+12
G40III100±19.0110.062.0(L)4from-16to-40from+4 to+16
G80(2)III100±14.0220.14.0(A)4from-12 to-40from+4 to+12
G100nIII150±47.52.52.50.15.0(L)10from-40 to-100from+10 to+40
G200IV150±72.5550.1510(L)10from-60 to-100from+10 to+60
G300(1)IV25.4±70.010100.220(A)20from-60 to-200from+20 to+60
G300(3)IV25,450.8±10515150.230(A)30from-90 to-300from+30 06+01
G300IV50,875±14020200.240(A)40from-120 to-400from+40 to+120
G500(4)V25.4±75.0252550(A)50-50050
G500V25,450.8±112.5252575(A)75-75075
G500V50,875±1502525100(A)100-1000100
G500V75100±187.53232125(A)125-1250125
G500V100125±2253838150(A)150-1500150
G500V125150±262.54444175(A)175-1750175
G600(4)VIallall±200400(A)0
G700(4)VIallall±10002000(A)0

Terms,Symbols and Definitions

TERMSYMBOLDEFINITION
Nominal ball diameterDwDiameter value which is used for the general identification of a ball size
Single ball diameterDwsDistance between two parallel planes tangential to the actual surface of a ball.
Mean ball diameterDwmArithmetical mean of the largest and the smallest of the single diameters of a ball
Variation of ball diameterVDwsDifference between the largest and the smallest of the single diameters of a ball
Deviation from spherical formtDwGreatest radial distance, in any equatorial plane, between the smallest circumscribed sphere and the greatest inscribed sphere, with their centres common to the least square sphere centre.
Ball lot Defines quantity of balls manufactured under conditions presumed uniform and which is considered as an entity
Mean diameter of ball lotDwmLArithmetical mean of the mean diameters of the largest balI and the smallest ball in a ball lot.
Variation diameter of ball lot diameterVDwLDifference between the mean diameters of the largest balI and the smallest ball in a ball lot.
Ball gradeGSpecific combination of dimensional, form, surface roughness and sorting tolerances for balls. Ball grade is identified by the letter G and a number.
Ball gaugeSAmount by which the mean diameter of a ball lot should differ from the nominal ball diameter,this amount being one of an established series.Each ball gauge is a whole multiple of the ball gauge interval established for the balL grade in question. A ball gauge, in combination with the ball grade and nominal diameter, should be considered as the most exact ball size specification to be used by a customer for ordering purposes.
Deviation of a ball lot from ball gaugeΔSDifference between the mean diameter of a ball lot and the sum of the nominal ball diameter and the ball gauge:ΔS=DwmL-(Dw+S).
Ball subgaugeAmount of an established series of amounts, which is the nearest to the actual deviation from the ball gauge of a ball lot. Each ball subgauge is a whole multiple of the ball subgauge interval established for the ball grade in question. The ball subgauge, in combination with the nominal ball diameter and the ball gauge, is used by ball manufacturers to denote the mean diameter of a ball lot and should not be used by customers of ordering purposes.
Hardness Measure of resistance to penetration as determined by specific methods
Surface roughnessRaSurface irregularities with relatively small spacings, which usually include irregularities resulting from the method of manufacture being used and/or other influences.These irregularities are considered within the limits that are conventionally defined, e.g., whitin the limits of the sampling length.
Waviness Surface irregularities of random of periodical deviation from the ideal spherical form.It is recommended that waviness be evaluated as velocity amplutude. In practice, the waviness components are separated from the real surface by a waviness analyser(filters).
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SHANDONG SDBALLS INDUSTRY CORP LTD.

Conversion Chart

Shandong SDBALLS Industry Co., LTD is established on the basis of Shengdian Steel ball Factory. With more than 30 years of production experience.

Material Chemical Composition

Steel%C%Si%Mn%P%S%Cr%Ni%N%Mo%Ti
AISI 1010/10150.08-0.180.10-0.350.30-0.600.040 max0.050 max
AISI 10850.80-0.930.10-0.350.70-1.000.040 max0.050 max
AISI 521000.95-1.100.35 max0.20-0.500.025 max0.025 max1.30-1.60
AISI 302/304/304L0.150 max1.00 max2.00 max0.045 max0.030 max17.00-20.008.00-10.500.100 max
AISI 316/316L0.080 max1.00 max2.00 max0.045 max0.030 max16.00-18.0010.00-14.002.00-3.00
AISI 316Ti0.080 max0.75 max2.00 max0.045 max0.030 max16.00-18.0010.00-14.000.100 max2.00-3.005x%C-0.70
AISI 420(A-B-C)0.16-0.501.00 max1.50 max0.040 max0.030 max12.00-14.50
AISI 440C0.95-1.201.00 max1.00 max0.040 max0.030 max16.00-18.000.75 max

Material Convesion Chart

USACHNITAUKGERFRARUSJAP
101515C15080M151.1141XC1215S15C
108582BC90C85S1.1269XC9085 (A)SWRH87B
52100GCr15100Cr6534A991.3505100C69Ch1SUJ2
2011Cr17Mn6Ni5N201 S 011.4372Z12CMN17-07Az14Ch18N4G4LSUS 201
3040Cr18Ni9X5CrNi18-10304S151.4301Z7CN18-0908KH18N10SUS304
304L00Cr19Ni10X2CrNi18-9304S111.4307Z3CN18-1004KH18N10SUS304L
3160Cr17Ni12Mo2X5CrNiMo1712316S161.4401Z6CND17.1108KH16N11M3SUS316
316L0Cr18Ni12Mo2TiX2CrNiMo1712316S111.4404Z3CND17-11-0203KH17N14M2SUS316L
420C4Cr13X46Cr131.4034Z 34 C 1440 Kh 13

Size and Weight Convesion Chart

SIZEWeight ofQ/KG
inchmm1000balls in kg52100
 0.50.00051960784
 0.60.00081135074
1/32′0.7940.00204490196
 0.80.00209478927
 10.00408245158
1.21.20.00705141884
 1.50.0137772124
1/16′1.58750.01660843
5/64′1.98440.03231500
 20.03330427
3/32′2.3810.05518058
 2.50.06415612
7/64′2.7780.08711478
 30.1119035
1/8′3.1750.1317622
 3.50.1765689
5/32′3.9690.2563902
 40.2623811
 4.50.3742677
3/16′4.7630.4432258
 50.5131951
7/325.5560.7031422
15/64′5.9530.8661155
 60.8861129
1/4′6.351.049953
17/64′6.7471.259794
 71.406711
9/32′7.1441.495669
5/16′7.9382.053487
SIZEWeight ofQ/KG
inchmm1000balls in kg52100
 82.101476
11/32′8.7312.732366
 92.994334
3/8′9.5253.546282
 104.115243
13/32′10.3194.505222
 115.464183
7/16′11.1135.65177
29/64′11.5096.25160
15/32′11.9066.944144
 127.092141
31/64′12.3037.634131
1/2′12.78.403119
 139.072111
17/32′13.49410.10199
 1411.23689
9/16′14.28811.90584
 1513.88972
19/32′15.08114.08571
5/8′15.87516.39361
 1616.66760
21/32′16.66918.86853
 172050
11/16′17.46321.73946
 1823.80942
23/32′18.2562540
3/4′19.0528.57135
25/32′19.84432.25831
 2032.78730.5
SIZEWeight ofQ/KG
inchmm1000balls in kg52100
27/32′21.4314025
 2243.47823
7/8′22.22545.45522
 235020
29/32′23.0195020
15/16′23.81355.55618
 2456.68917.64
31/32′24.60661.08716.37
 2564.06115.61
1′25.467.20414.88
 2672.04613.88
1.1/16′26.98880.5812.41
 2890.00911.11
1.1/8′28.57595.69410.45
 30110.7429.03
1.3/16′30.163112.4868.89
1.1/4′31.75131.2347.62
 32134.4097.44
1.5/16′33.338151.9766.58
 34161.296.2
1.3/8′34.925174.8255.72
 35176.0565.68
 36191.5715.22
1.7/16′36.513199.6015.01
 38225.2254.44
1.1/2′38.1226.7574.41
1.9/16′39.688256.413.9
 40262.4673.81
1.5/8′41.275288.1843.47
SIZEWeight ofQ/KG
inchmm1000balls in kg52100
1.3/444.45359.7122.78
 45373.1342.68
1.13/1646.0384002.5
1.7/8′47.625442.4782.26
1.15/1649.212485.4372.06
 50512.8211.95
2′50.8537.6341.86
2.1/8′53.975645.1611.55
 55680.2721.47
2.1/4′57.15763.3591.31
 60884.9561.13
2.3/860.325892.8571.12
2.1/2′63.51052.630.95
 701408.450.71
 751724.130.58
3′76.21818.180.55
3.1/879.3752040.810.49
 802040.810.47
3.1/4′82.552325.580.43
3.1/288.92857.140.35
 903030.30.33
3.3/4′95.253571.420.28
 1004166.660.24
4′101.64347.80.23
 1105555.550.18
 1207142.850.14
The weight specified above is based on the SAE52100 steel balls 1Kg=2.205 1bs(USA)
The multiplying factor for obtaining the approximate weight of 1000 balls in Kgs; for other materials is as given below.
MaterialMutiplying Factor
Carbon Steel1.004
Stainless Steel AISI 302/3041.011
Stainless Steel AISI 3161.025
Stainless Steel AISI 420/4400.979
Glass0.344

Hardness Conversion Chat

HRCHRAHR15NHR30NHR45NHVHB30D2d10、2d5、4d2.5mm
17 67.337.915.62112114.15
17.5 67.638.416.22142144.13
18 67.838.916.82162164.11
18.5 6839.317.42182184.09
19 68.339.8182212204.07
19.5 68.540.318.62232224.05
20 68.840.719.22262254.03
20.5 6941.219.82292274.02
21 69.341.720.42312274
21.5 69.542.2212342323.97
22 69.842.621.52372343.95
22.5 7043.122.12402373.93
23 70.343.622.72432403.91
23.5 70.64423.32462423.89
24 70.844.523.92492453.87
24.5 71.14524.52522483.85
25 71.445.525.12552513.83
25.5 71.645.925.72582543.8
26 71.946.426.32612573.78
26.5 72.246.926.92642603.76
27 72.447.327.52682633.74
27.5 72.747.828.12712663.72
28 7348.328.72742693.7
28.5 73.348.729.32782733.67
29 73.549.229.92812763.65
29.5 73.849.730.52852803.63
30 74.150.231.12982833.61
30.5 74.450.631.72922873.59
31 74.751.132.32962913.56
31.5 74.951.632.93002943.54
32 75.25233.53042983.52
32.5 75.552.534.13083023.5
33 75.85334.73123063.48
33.5 76.153.435.33163103.46
34 76.453.935.93203143.43
34.5 76.754.436.53243183.41
35 7754.8373293233.39
35.5 77.255.337.63333273.37
36 77.555.838.23383323.34
36.5 77.856.238.83423363.32
37 78.156.739.43473413.3
37.5 78.457.2403523453.28
38 78.757.640.63573503.26
38.5 7958.141.23623553.24
397079.358.641.83673603.21
39.570.379.65942.43723653.19
4070.579.959.5433773703.17
40.570.880.26043.63823753.15
4171.180.560.444.23883803.13
41.571.380.860.944.83933853.11
4271.681.161.345.43993913.09
42.571.881.461.845.94053963.07
4372.181.762.346.54114013.05
43.572.48262.747.14174073.03
4472.682.363.247.74234133.01
44.572.982.663.648.34294182.99
4573.282.964.148.94364242.97
45.573.483.264.649.54434302.95
4673.783.56550.14494362.93
46.573.983.765.550.74564422.91
4774.28465.951.24634492.89
47.574.584.366.451.84704552.87
4874.784.666.852.44784612.85
48.57584.967.3534854682.83
4975.385.267.753.64934742.81
49.575.585.568.254.25014812.79
5075.885.768.654.75094882.77
50.576.18669.155.34174942.75
5176.386.369.555.95255012.73
51.576.686.67056.5534  
5276.986.870.457.1543  
52.577.187.170.957.6551  
5377.487.471.358.2561  
53.577.787.671.858.8570  
5477.987.972.259.4579  
54.578.287.672.659.9589  
5578.588.473.160.5599  
55.578.788.673.561.1609  
567988.973.961.7620  
56.579.389.174.462.2631  
5779.589.474.862.8642  
57.579.889.675.263.4653  
5880.189.875.663.9664  
58.580.39076.164.5676  
5980.690.276.565.1688  
59.580.990.476.965.6700  
6081.290.677.366.2713  
60.581.490.877.766.8726  
6181.79178.167.3739  
61.58291.278.667.9752  
6282.291.47968.4766  
62.582.591.579.469780  
6382.891.779.869.5795  
63.583.191.880.270.1810  
6483.391.980.670.6825  
64.583.692.18171.2840  
6583.992.281.371.7856  
65.584.1   872  
6684.4   889  
66.584.7   906  
6785   923  
67.585.2   941  
6885.5   959  
68.585.8   978  
6986.1   997  
69.586.3   1017  
7086.6   1037