轴径
|
键
|
键 槽
|
d
|
b×h
|
宽 度
|
深 度
|
半径
|
b
|
偏 差
|
轴
|
毂
|
较松
|
一般
|
较紧
|
轴H9
|
毂D10
|
轴N8
|
毂JS9
|
轴毂P9
|
t
|
偏差
|
t1
|
偏差
|
最大
|
最小
|
6~8
|
2×2
|
2
|
+0.025
0
|
+0.060
+0.020
|
-0.004
-0.029
|
±0.0125
|
-0.006
-0.031
|
1.2
|
+0.1
0
|
1
|
+0.1
0
|
0.08
|
0.16
|
>8~10
|
3×3
|
3
|
1.8
|
1.4
|
>10~12
|
4×4
|
4
|
+0.030
0
|
+0.078
+0.030
|
0
-0.030
|
±0.015
|
-0.012
-0.042
|
2.5
|
1.8
|
>12~17
|
5×5
|
5
|
3.0
|
2.3
|
0.16
|
0.25
|
>17~22
|
6×6
|
6
|
3.5
|
2.8
|
>22~30
|
8×7
|
8
|
+0.036
0
|
+0.098
+0.040
|
0
-0.036
|
±0.018
|
-0.015
-0.051
|
4.0
|
+0.2
0
|
3.3
|
+0.2
0
|
>30~38
|
10×8
|
10
|
5.0
|
3.3
|
0.25
|
0.40
|
>38~44
|
12×8
|
12
|
+0.043
0
|
+0.120
+0.050
|
0
-0.043
|
±0.0215
|
-0.018
-0.061
|
5.0
|
3.3
|
>44~50
|
14×9
|
14
|
5.5
|
3.8
|
>50~58
|
16×10
|
16
|
6.0
|
4.3
|
>58~65
|
18×11
|
18
|
7.0
|
4.4
|
>65~75
|
20×12
|
20
|
+0.052
0
|
+0.149
+0.065
|
0
-0.052
|
±0.026
|
-0.022
-0.074
|
7.5
|
4.9
|
0.40
|
0.60
|
>75~85
|
22×14
|
22
|
9.0
|
5.4
|
>85~95
|
25×14
|
25
|
9.0
|
5.4
|
>
95~110
|
28×16
|
28
|
10.0
|
6.4
|
>
110~130
|
32×18
|
32
|
+0.062
0
|
+0.180
+0.080
|
0
-0.062
|
±0.031
|
-0.026
-0.088
|
11.0
|
7.4
|
>
130~150
|
36×20
|
36
|
12.0
|
+0.3
0
|
8.4
|
+0.3
0
|
0.70
|
1.0
|
>
150~170
|
40×22
|
40
|
13.0
|
9.4
|
>
170~200
|
45×25
|
45
|
15.0
|
10.4
|
>
200~230
|
50×28
|
50
|
17.0
|
11.4
|
>
230~260
|
56×32
|
56
|
+0.074
0
|
+0.220
+0.100
|
0
-0.074
|
±0.037
|
0.032
-0.106
|
20.0
|
12.4
|
1.2
|
1.6
|
>
260~290
|
63×32
|
63
|
20.0
|
12.4
|
>
290~330
|
70×36
|
70
|
22.0
|
14.4
|
>
330~380
|
80×40
|
80
|
25.0
|
15.4
|
2.0
|
2.5
|
>
380~440
|
90×45
|
90
|
+0.087
0
|
+0.260
+0.120
|
0
-0.087
|
±0.0135
|
-0.037
-0.124
|
28.0
|
17.4
|
>
440~500
|
100×50
|
100
|
31.0
|
19.5
|
1,在工作图中,轴槽槽深用t或(d-t)标注,轮毂槽深按d+t1标注
2,d-t和d+t1的偏差按相应的t和t1的偏差选取,但d-t的偏差应取负值
3,除轴外,在保证所需转矩的条件下,允许采用较小剖面的键,但t和t1必要时需从新计算,使键槽与键的接触高度各为h/2
4,表中较松键的链接的偏差适用于导向平键的联接
5,平键的槽长偏差用H14
6,轴槽及轮毂槽宽b对轴及轮毂中心线的对称度的公差按7~9级(gb1184-80)
7,当平键长度与宽度比,即L/b>8时,键的两侧面在长度方向的平行度应符合下列规定:b《6mm,按7级,b》8~36时,按6级,b》40时,按5级。
8,需要时,键允许起键螺孔。
普通平键型式尺寸(GB1036-79)
A, b偏差代号h9,粗糙度3.2,键高h偏差代号h11,粗糙度12.5。
B,键槽宽粗糙度取3.2,高度面粗糙度取12.5.
C,长度L公差等级按h14
键长L系列:6,8,10,12,14,16,18,20,22,25,28,32,36,40,45,50,56,63,70,80,90,100,110,125,140,160,180,200,220......