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ISO 3290-1:2008 / GB/T 308.1-2013 / JIB 1501-2009 / KS B 2001:2001 Rolling bearings — Balls - Part 1: Steel balls
GradeVariation of ball diameter
VDws(≤)
(μm)
Deviation from spherical form
∆RSw(≤)
(μm)
Surface roughness
Ra(≤)
(μm)
Variation of
ball lot
diameter
VDwL(≤)
(μm)
Ball gauge
interval
(μm)
Preferred ball gauges
(μm)
G 30.080.080.010.130.5-5 ~ +5
G 50.130.130.0140.251-5 ~ +5
G 100.250.250.020.51-9 ~ +9
G 160.40.40.0250.82-10 ~ +10
G 200.50.50.03212-10 ~ +10
G 240.60.60.041.22-12 ~ +12
G 280.70.70.051.42-12 ~ +12
G 40110.0624-16 ~ +16
G 601.51.50.0836-18 ~ +18
G 1002.52.50.1510-40 ~ +40
G 200550.151015-60 ~ +60
ANSI/ABMA Std. 10A-2001 Metal Balls for unground bearings and other uses
GradeVariation of ball diameter
VDws(≤)
(μm)
Deviation from spherical form
∆RSw(≤)
(μm)
Surface roughness
Ra(≤)
(μm)
Variation of
ball lot
diameter
VDwL(≤)
(μm)
Nominal ball diameter tolerance
(μm)
G3A0.080.080.0120.13*
G5A0.130.130.0200.25*
G10A0.250.250.0250.5*
G16A0.40.40.0250.8*
G24A0.60.60.051.2*
G48A1.21.20.082.4*
G100A2.52.50.1255±12.5
G200A550.210±25
G500A1313*25±50
G1000A2525*50±125
G2000A5050*100±250
DIN 5401-2002 Balls for rolling bearings and general industrial use
GradeNominal Size
(mm)
Limit Deviations
(μm)
Variation of ball diameter
VDws(≤)
(μm)
Deviation from spherical form
∆RSw(≤)
(μm)
Surface roughness
Ra(≤)
(μm)
Variation of
ball lot
diameter
VDwL(≤)
(μm)
Ball gauge
interval
(μm)
Preferred ball gauges
(μm)
G 30 ~ 12.7± 5.320.080.080.010.130.5-5 ~ +5
G 50 ~ 12.7± 5.630.130.130.0140.251-5 ~ +5
G 100 ~ 25.4± 9.750.250.250.020.51-9 ~ +9
G 160 ~ 25.4± 11.40.40.40.0250.82-10 ~ +10
G 200 ~ 38.1± 11.50.50.50.03212-10 ~ +10
G 280 ~ 50.8± 13.70.70.70.051.42-12 ~ +12
G 400 ~ 100± 19110.0624-16 ~ +16
G 800 ~ 100± 14220.1*4-12 ~ +12
G 1000 ~ 150± 47.52.52.50.1510-40 ~ +40
G 2000 ~ 150± 72.5550.151010-60 ~ +60
G 3000 ~ 25.4± 7010100.2*20-60 ~ +60
G 30025.4 ~ 50.8± 10515150.2*30-90 ~ +90
G 30050.8 ~ 75± 14020200.2*40-120 ~ +120
G 5000 ~ 25.4± 752525**50-50 ~ +50
G 50025.4 ~ 50.8± 112.52525**75-75 ~ +75
G 50050.8 ~ 75± 1502525**100-100 ~ +100
G 50075 ~ 100± 187.53232**125-125 ~ +125
G 500100 ~ 125± 2253838**150-150 ~ +150
G 500125 ~ 150± 262.54444**175-175 ~ +175
G 600all± 200******
G 700all± 1000******
GOST 3722-2014 (ГОСТ 3722-2014) Bearing Steel Balls
GradeVariation of ball diameter
VDws(≤)
(μm)
Deviation from spherical form
∆RSw(≤)
(μm)
Surface roughness
Ra(≤)
(μm)
Variation of
ball lot
diameter
VDwL(≤)
(μm)
Ball gauge
interval
(μm)
Preferred ball gauges
(μm)
G 30.080.08*0.130.5-5 ~ +5
G 50.130.130.020.251-5 ~ +5
G 100.250.250.020.51-9 ~ +9
G 160.40.40.0320.82-10 ~ +10
G 200.50.50.0412-10 ~ +10
G 240.60.60.041.22-12 ~ +12
G 280.70.70.051.42-12 ~ +12
G 40110.0824-16 ~ +16
G 601.51.50.136-18 ~ +18
G 1002.52.50.125510-40 ~ +40
G 200550.21015-60 ~ +60


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