AFBMA ボール等級表

インチ
ボール等級 真球度 ロット内相互差 寸法ス差(+/-) 表面粗さ(マイクロインチ)
3 0.000003 0.000005 0.000003 0.5
5 0.000005 0.00001 0.000005 0.8
10 0.00001 0.00002 0.00001 1.0
16 0.000016 0.000032 0.000016 1.0
24(25) 0.000024 0.000048 0.000024 2.0
48(50) 0.000048 0.000096 0.000048 3.0
100 0.0001 0.0002 0.0001 5.0
200 0.0002 0.0004 0.0002 8.0
500 0.0005 0.001 0.0005 ***
1000 0.001 0.002 0.001 ***
メトリック
ボール等級 真球度 ロット内相互差 寸法差(+/-) 表面粗さ
3 0.08μm 0.13μm 0.08μm 0.012μm
5 0.13μm 0.25μm 0.13μm 0.02μm
10 0.25μm 0.5μm 0.25μm 0.025μm
16 0.4μm 0.8μm 0.4μm 0.025μm
24(25) 0.6μm 1.2μm 0.6μm 0.05μm
48(50) 1.2μm 2.4μm 1.2μm 0.08μm
100 2.5μm 5μm 2.5μm 0.125μm
200 5μm 10μm 5μm 0.2μm
500 13μm 25μm 13μm ***
1000 25μm *** 25μm ***

AFBMA Std 10-1989(Revision of 1983)

Tolerances by Grade for Individual Balls Tolerances by Grade for Lots of Balls
VDws ∆Rw Ra VDwt ∆S
Ball Grade Allowable Ball Dia. Variation Allowable Deviation from Spherical Form Maximum Surface Roughness Arithmetic Average Allowable Lot Dia. Variation Nominal Ball Diameter Tolerance Allowable Ball Gauge Deviation Container Marking Increment
High Low
INCH
3 0.000003 0.000003 0.5 0.000005 * 0 0.00001
5 0.000005 0.000005 0.8 0.00001 * 0.00002 0.00001
10 0.00001 0.00001 1 0.00002 * 0.00001 0.00001
16 0.000016 0.000016 1 0.000032 * 0.00001 0.00001
24 0.000024 0.000024 2 0.000048 * 0 0.00001
48 0.000048 0.000048 3 0.000096 * * 0.00005
100 0.0001 0.0001 5 0.0002 ±.0005 * *
200 0.0002 0.0002 8 0.0004 ±.001 * *
500 0.0005 0.0005 * 0.001 ±.002 * *
1000 0.001 0.001 * 0.002 ±.005 * *
METRIC µm
3 0.08 0.08 0.012 0.13 * 0 0.25
5 0.13 0.13 0.02 0.25 * 0.25 0.25
10 0.25 0.25 0.025 0.5 * 0.25 0.25
16 0.4 0.4 0.025 0.8 * 0.25 0.25
24 0.6 0.6 0.05 1.2 * 0 0.25
48 1.2 1.2 0.08 2.4 * * 1.25
100 2.5 2.5 0.125 5 ±12.5 * *
200 5 5 0.2 10 ±25 * *
500 13 13 * 25 ±50 * *
1000 25 25 *

GB308-84 ISO 3290

Grade Ball Dia.
Variation
Deviation
from
Spherical
Form
Surface
Roughness
Lot Dia.
Variation
Gauge
Interval
Preferred
Gauge
Subgauge
Interval
Subgauge
G3 0.08 0.08 0.01 0.13 0.5 -5...-0.5 0 +0.5...+5 0.1 -0.2,-0.1, 0, +0.1,+0.2
G5 0.13 0.13 0.014 0.25 1 -5...-1 0 +1...+5 0.2 -0.4,-0.2, 0, +0.2,+0.4
G10 0.25 0.25 0.02 0.5 1 -9...-1 0 +1...+9 0.2 -0.4,-0.2, 0, +0.2,+0.4
G16 0.4 0.4 0.025 0.8 2 -10...-2 0 +2...+10 0.4 -0.8,-0.4 0, +0.4,+0.8
G20 0.5 0.5 0.032 1 2 -10...-2 0 +2...+10 0.4 -0.8,-0.4 0, +0.4,+0.8
G24 0.6 0.6 0.04 1.2 2 -12...-2 0 +2...+12 0.4 -0.8,-0.4 0, +0.4,+0.8
G28 0.7 0.7 0.05 1.4 2 -12...-2 0 +2...+12 0.4 -0.8,-0.4 0, +0.4,+0.8
G40 1 1 0.06 2 4 -16...-4 0 +4...+16 0.8 -1.6,-0.8, 0, +0.8,+1.6
G60 1.5 1.5 0.08 3 6 -18...-6 0 +6...+18 1.2 -2.4,-1.2, 0. +1.2,+2.4
G100 2.5 2.5 0.1 5 10 -40...-10 0 +10...+40 2 -4,-2, 0, +2,+4
G200 5 5 0.15 10 15 -60...-15 0 +15...+60 3 -6,-3, 0, +3,+6

DIN 5401

Dw VDws tDw Ra5) VDwL VDwA IG;ST
Grade Nominal Ball Diameter Gauge Allowance µm max. µm max. µm max. µm max. µm max. µm max. Mean allowances in Each Grade
G3 - 12,7 ± 5,32 0,08 0,08 0,010 0,13 - 0,5 -5 .. .-0.5 0 +0.5 ... +5
G5 - 12,7 ± 5,63 0,13 0,13 0,014 0,25 - 1 -5 ... -1 0 +1 ... +5
G10 - 25,4 ± 9,75 0,25 0,25 0,020 0,5 - 1 -9 ... -1 0 +1 ... +9
G16 - 25,4 ± 11,4 0,4 0,4 0,025 0,8 - 2 -10 ... -2 0 +2 ... +10
G20 - 38,1 ± 11,5 0,5 0,5 0,032 1 - 2 -10 ... -2 0 +2 ... +10
G28 - 50,8 ± 13,7 0,7 0,7 0,050 1,4 - 2 -12 ... -2 0 +2 ... +12
G40 - 100 ± 19 1 1 0,060 2 - 4 -16 ... -4 0 +4 ... +16
G80 - 100 ± 14 2 2 0,1 - 4,0 4 -12 ... -4 0 +4 ... +12
G100 - 150 ± 47,5 2,5 2,5 0,1 5 - 10 -40 ... -10 0 +10 ... +40
G200 - 150 ± 72,5 5 5 0,15 10 - 10 -60 ... -10 0 +10 ... +60
G300 - 25,4 ± 70 10 10 0,2 - 20 20 -60 ... -20 0 +20 ... +60
G300 25,4 50,8 ± 105 15 15 0,2 - 30 30 -90 ... -30 0 + 30 ... +90
G300 50,8 75 ± 140 20 20 0,2 - 40 40 -120 ... -40 0 +40 ... +120
G500 - 25,4 ± 75 25 25 - - 50 50 -50 0 50
G500 25,4 50,8 ± 112,5 25 25 - - 75 75 -75 0 75
G500 50,8 75 ± 150 25 25 - - 100 100 -100 0 100
G500 75 100 ± 187,5 32 32 - - 125 125 -125 0 125
G500 100 125 ± 225 38 38 - - 150 150 -150 0 150
G500 125 150 ± 262,5 44 44 - - 175 175 -175 0 175
G600 all ± 200 - - - - 400 - - 0 -
G700 all ± 1000 - - - - 2000 - - 0 -