孔的基本偏差数值 （GB/T 1800.3—1998）（mm）
基本尺寸/
mm
|
基 本 偏 差 数 值
|
Δ值
|
下 偏 差 E1
|
上 偏 差 ES
|
所 有 标 准 < 差 等 级
|
IT6
|
IT7
|
IT8
|
≤
IT8
|
＞
IT8
|
≤
IT8
|
＞IT8
|
≤
IT8
|
＞
IT8
|
≤IT7
|
标 准 公 差 等 级 大 于 IT7
|
标准公差等级
|
大于
|
至
|
A
|
B
|
C
|
CD
|
D
|
E
|
EF
|
F
|
FG
|
G
|
H
|
Js
|
J
|
K
|
M
|
N
|
P至ZC
|
P
|
R
|
S
|
T
|
U
|
V
|
X
|
Y
|
Z
|
ZA
|
ZB
|
ZC
|
IT3
|
IT4
|
IT5
|
IT6
|
IT7
|
IT8
|
—
|
3
|
+270
|
+140
|
+60
|
+34
|
+20
|
+14
|
+10
|
+6
|
+4
|
+2
|
0
|
|
+2
|
+4
|
+6
|
0
|
0
|
2
|
-2
|
-4
|
-4
|
|
-6
|
-10
|
-14
|
|
-18
|
|
-20
|
|
-26
|
-32
|
-40
|
-60
|
0
|
0
|
0
|
0
|
0
|
0
|
3
|
6
|
+270
|
+140
|
+70
|
+46
|
+30
|
+20
|
+14
|
+10
|
+6
|
+4
|
0
|
+5
|
+6
|
+10
|
-1+Δ
|
|
-4+Δ
|
-4
|
-8+Δ
|
0
|
-12
|
-15
|
-19
|
|
-23
|
|
-28
|
|
-35
|
-42
|
-50
|
-80
|
1
|
1.5
|
1
|
3
|
4
|
6
|
6
|
10
|
+280
|
+150
|
+80
|
+56
|
+40
|
+25
|
+18
|
+13
|
+8
|
+5
|
0
|
+5
|
+8
|
+12
|
-1+Δ
|
|
-6+Δ
|
-6
|
-10+Δ
|
0
|
-15
|
-19
|
-23
|
|
-28
|
|
-34
|
|
-42
|
-52
|
-67
|
-97
|
1
|
1.5
|
2
|
3
|
6
|
7
|
10
|
14
|
+290
|
+150
|
+95
|
|
+50
|
+32
|
|
+16
|
|
+6
|
0
|
+6
|
+10
|
+15
|
-1+Δ
|
|
-7+Δ
|
-7
|
-12+Δ
|
0
|
-18
|
-23
|
-28
|
|
-33
|
|
-40
|
|
-50
|
-64
|
-90
|
-130
|
1
|
2
|
3
|
3
|
7
|
9
|
14
|
18
|
-39
|
-45
|
|
-60
|
-77
|
-108
|
-150
|
18
|
24
|
+300
|
+160
|
+110
|
|
+65
|
+40
|
|
+20
|
|
+7
|
0
|
+8
|
+12
|
+20
|
-2+Δ
|
|
-8+Δ
|
-8
|
-15+Δ
|
0
|
-22
|
-28
|
-35
|
|
-41
|
-47
|
-54
|
-63
|
-73
|
-98
|
-136
|
-188
|
1.5
|
2
|
3
|
4
|
8
|
12
|
24
|
30
|
-41
|
-48
|
-55
|
-64
|
-75
|
-88
|
-118
|
-160
|
-218
|
30
|
40
|
+310
|
+170
|
+120
|
|
+80
|
+50
|
|
+25
|
|
+9
|
0
|
+10
|
+14
|
+24
|
-2+Δ
|
|
-9+Δ
|
-9
|
-17+Δ
|
0
|
-26
|
-34
|
-43
|
-48
|
-60
|
-68
|
-80
|
-94
|
-112
|
-148
|
-200
|
-274
|
1.5
|
3
|
4
|
5
|
9
|
14
|
40
|
50
|
+320
|
+180
|
+130
|
-54
|
-70
|
-81
|
-97
|
-114
|
-136
|
-180
|
-242
|
-325
|
50
|
65
|
+340
|
+190
|
+140
|
|
+100
|
+60
|
|
+30
|
|
+10
|
0
|
+13
|
+18
|
+28
|
-2+Δ
|
|
-11+Δ
|
-11
|
-20+Δ
|
0
|
-32
|
-41
|
-53
|
-66
|
-87
|
-102
|
-122
|
-144
|
-172
|
-226
|
-300
|
-405
|
2
|
3
|
5
|
6
|
11
|
16
|
65
|
80
|
+360
|
+200
|
+150
|
-43
|
-59
|
-75
|
-102
|
-120
|
-146
|
-174
|
-210
|
-274
|
-360
|
-480
|
80
|
100
|
+380
|
+220
|
+170
|
|
+120
|
+72
|
|
+36
|
|
+12
|
0
|
+16
|
+22
|
+34
|
-3+Δ
|
|
-13+Δ
|
-13
|
-23+Δ
|
0
|
-37
|
-51
|
-71
|
-91
|
-124
|
-146
|
-178
|
-214
|
-258
|
-335
|
-445
|
-585
|
2
|
4
|
5
|
7
|
13
|
19
|
100
|
120
|
+410
|
+240
|
+180
|
-54
|
-79
|
-104
|
-144
|
-172
|
-210
|
-254
|
-310
|
-400
|
-525
|
-690
|
120
|
140
|
+460
|
+260
|
+200
|
|
+145
|
+85
|
|
+43
|
|
+14
|
0
|
+18
|
+26
|
+41
|
-3+Δ
|
|
-15+Δ
|
-15
|
-27+Δ
|
0
|
-43
|
-63
|
-92
|
-122
|
-170
|
-202
|
-248
|
-300
|
-365
|
-470
|
-620
|
-800
|
3
|
4
|
6
|
7
|
15
|
23
|
140
|
160
|
+520
|
+280
|
+210
|
-65
|
-100
|
-134
|
-190
|
-228
|
-280
|
-340
|
-415
|
-535
|
-700
|
-900
|
160
|
180
|
+580
|
+310
|
+230
|
-68
|
-108
|
-146
|
-210
|
-252
|
-310
|
-380
|
-465
|
-600
|
-780
|
-1000
|
180
|
200
|
+660
|
+310
|
+240
|
|
+170
|
+100
|
|
+50
|
|
+15
|
0
|
+22
|
+30
|
+47
|
-4+Δ
|
|
-17+Δ
|
-17
|
-31+Δ
|
0
|
-50
|
-77
|
-122
|
-166
|
-236
|
-284
|
-350
|
-425
|
-520
|
-670
|
-880
|
-1150
|
3
|
4
|
6
|
9
|
17
|
26
|
200
|
225
|
+740
|
+380
|
+260
|
-80
|
-130
|
-180
|
-258
|
-310
|
-385
|
-470
|
-575
|
-740
|
-960
|
-1250
|
225
|
250
|
+820
|
+420
|
+280
|
-84
|
-140
|
-196
|
-284
|
-340
|
-425
|
-520
|
-640
|
-820
|
-1050
|
-1350
|
250
|
280
|
+920
|
+480
|
+300
|
|
+190
|
+110
|
|
+56
|
|
+17
|
0
|
+25
|
+36
|
+55
|
-4+Δ
|
|
-20+Δ
|
-20
|
-34+Δ
|
0
|
-56
|
-94
|
-158
|
-218
|
-315
|
-385
|
-475
|
-580
|
-710
|
-920
|
-1200
|
-1550
|
4
|
4
|
7
|
9
|
20
|
29
|
280
|
315
|
+1050
|
+540
|
+330
|
-98
|
-170
|
-240
|
-350
|
-425
|
-525
|
-650
|
-790
|
-1000
|
-1300
|
-1700
|
315
|
355
|
+1200
|
+600
|
+360
|
|
+210
|
+125
|
|
+62
|
|
+18
|
0
|
+29
|
+39
|
+60
|
-4+Δ
|
|
-21+Δ
|
-21
|
-37+Δ
|
0
|
--62
|
-108
|
-190
|
-268
|
-390
|
-475
|
-590
|
-730
|
-900
|
-1150
|
-1500
|
-1900
|
4
|
5
|
7
|
11
|
21
|
32
|
355
|
400
|
+1350
|
+680
|
+400
|
-114
|
-208
|
-294
|
-435
|
-530
|
-660
|
-820
|
-1000
|
-1300
|
-1650
|
-2100
|
400
|
450
|
+1500
|
+760
|
+440
|
|
+230
|
+135
|
|
+68
|
|
+20
|
0
|
+33
|
+43
|
+66
|
-5+Δ
|
|
-23+Δ
|
-23
|
-40+Δ
|
0
|
-68
|
-126
|
-232
|
-330
|
-490
|
-595
|
-740
|
-920
|
-1100
|
-1450
|
-1850
|
-2400
|
5
|
5
|
7
|
13
|
23
|
34
|
450
|
500
|
+1650
|
+840
|
+480
|
-132
|
-252
|
-360
|
-540
|
-660
|
-820
|
-1000
|
-1250
|
-1600
|
-2100
|
-2600
|
500
|
560
|
|
|
|
|
+260
|
+145
|
|
+76
|
|
+22
|
0
|
|
|
|
0
|
|
-26
|
-44
|
-78
|
-150
|
-280
|
-400
|
-600
|
|
|
|
|
|
|
|
|
|
|
|
|
|
560
|
630
|
-155
|
-310
|
-450
|
-660
|
630
|
710
|
|
|
|
|
+290
|
+160
|
|
+80
|
|
+24
|
0
|
|
|
|
0
|
|
-30
|
-50
|
-88
|
-175
|
-340
|
-500
|
-740
|
|
|
|
|
|
|
|
|
|
|
|
|
|
710
|
800
|
-185
|
-380
|
-560
|
-840
|
800
|
900
|
|
|
|
|
+320
|
+170
|
|
+86
|
|
+26
|
0
|
|
|
|
0
|
|
-34
|
-56
|
-100
|
-210
|
-430
|
-620
|
-940
|
|
|
|
|
|
|
|
|
|
|
|
|
|
900
|
1000
|
-220
|
-470
|
-680
|
-1050
|
1000
|
1120
|
|
|
|
|
+350
|
+195
|
|
+98
|
|
+28
|
0
|
|
|
|
0
|
|
-40
|
-65
|
-120
|
-250
|
-520
|
-780
|
1150
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1120
|
1250
|
-260
|
-580
|
-810
|
-1300
|
1250
|
1400
|
|
|
|
|
+390
|
+220
|
|
+110
|
|
+30
|
0
|
|
|
|
0
|
|
-48
|
-78
|
-140
|
-300
|
-640
|
-960
|
-1450
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1400
|
1600
|
-330
|
-720
|
-1050
|
-1600
|
1600
|
1800
|
|
|
|
|
+430
|
+240
|
|
+120
|
|
+32
|
0
|
|
|
|
0
|
|
-58
|
-92
|
-170
|
-370
|
-820
|
-1200
|
-1850
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1800
|
2000
|
-400
|
-920
|
-1350
|
-2000
|
2000
|
2240
|
|
|
|
|
+480
|
+260
|
|
+130
|
|
+34
|
0
|
|
|
|
0
|
|
-68
|
-110
|
-195
|
-440
|
-1000
|
-1500
|
-2300
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2240
|
2500
|
-460
|
-1100
|
-1650
|
-2500
|
2500
|
2800
|
|
|
|
|
+520
|
+290
|
|
+145
|
|
+38
|
0
|
|
|
|
0
|
|
-76
|
-135
|
-240
|
-550
|
-1250
|
-1900
|
-2900
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2800
|
3150
|
-580
|
-1400
|
-2100
|
-3200
|
注：1．基本尺寸≤1mm时，基本偏差A和B及大于IT8的N均不采用。
3．对小于或等于IT8的K、M、N和小于或等于IT7的P至ZC，所需Δ值从表内右侧选取。
例如：18～30mm段的K7：Δ=8mm，所以ES=-2+8=+6mm；
18～30mm段的S6：Δ=4mm，所以ES=-35+4=-31mm
4．特殊情况：250～315mm段的M6，ES=-9mm（代替-11mm）。
