Key and Their Corresponding Keyways

PDF
Key and Their Corresponding Keyways

Shape and dimensions of parallel key and keyway

Unit : mm

Nominal dimen
sion of key b×h
Key dimension
Keyway dimension
Reference
b h C l Basic dimen
sion of b1
and b2
Sliding type
Normal type
Fastening type
r1
and
r2
Basic dimen
sion of t1
Basic dimen
sion of t2
Allow
ance t1 and
t2
Compliant shaft diameter d
Basic Dimen
sion
Allow
ance (h9)
Basic Dimen
sion
Allowance
b1  b2  b1  b2  b1 and b2
Allow
ance
(H9)
Allow
ance
(D10)
Allow
ance
(N9)
Allow
ance
(Js9)
Allow
ance
(P9)
2×2 2  0
-0.025
2  0
-0.025
h9 0.16
~0.25
6~20 2 +0.025
  0
+0.060
+0.020
-0.004
-0.029
±0.0125 -0.006
-0.031
0.08
~0.16
1.2 1.0 +0.1
  0
6~8
3×3 3 3 6~36 3 1.8 1.4 8~10
4×4 4  0
-0.030
4  0
-0.030
8~45 4 +0.030
  0
+0.078
+0.030
 0
-0.030
±0.0150 -0.012
-0.042
2.5 1.8 10~12
5×5 5 5 0.25
~0.40
10~56 5 0.16
~0.25
3.0 2.3 12~17
6×6 6 6 14~70 6 3.5 2.8 17~22
(7×7) 7  0
-0.036
7  0
-0.036
16~80 7 +0.036
  0
+0.098
+0.040
 0
-0.036
±0.0180 -0.015
-0.051
4.0 3.3 +0.2
  0
20~25
8×7 8 7  0
-0.090
h11 18~90 8 4.0 3.3 22~30
10×8 10 8 0.40
~0.60
22~110 10 0.25
~0.40
5.0 3.3 30~38
12×8 12  0
-0.043
8 28~140 12 +0.043
  0
+0.120
+0.050
 0
-0.043
±0.0215 -0.018
-0.061
5.0 3.3 38~44
14×9 14 9 36~160 14 5.5 3.8 44~50
(15×10) 15 10 40~180 15 5.0 5.3 50~55
16×10 16 10 45~180 16 6.0 4.3 50~58
18×11 18 11  0
-0.110
50~200 18 7.0 4.4 58~65
20×12 20  0
-0.052
12 0.60
~0.80
56~220 20 +0.052
  0
+0.149
+0.065
 0
-0.052
±0.0260 -0.022
-0.074
0.40
~0.60
7.5 4.9 65~75
22×14 22 14 63~250 22 9.0 5.4 75~85
(24×16) 24 16 70~280 24 8.0 8.4 80~90
25×14 25 14 70~280 25 9.0 5.4 85~95
28×16 28 16 80~320 28 10.0 6.4 95~110
32×18 32  0
-0.062
18 90~360 32 +0.062
  0
+0.180
+0.080
 0
-0.062
±0.0310 -0.026
-0.088
11.0 7.4 110~130

Shape and dimensions of taper key, headed taper key and keyway

Unit : mm

Nominal
dimen
sion
of key
b×h
Key dimension
Keyway dimension
Reference
b h h1 C l b1 and b2 r1
and
r2
Basic
dimen
sion
of t1
Basic
dimen
sion
of t2
Allow
ance
of t1
and t2
Compliant
shaft
diameter
d
Basic
Dimen
sion
Allow
ance
(h9) 
Basic
Dimen
sion
Allowance
Basic
dimen
sion
Allow
ance
(D10)
2×2 2  0
-0.025
2  0
-0.025
h9 - 0.16
~0.25
6~30  2 +0.060
+0.020
0.08
~0.16
1.2 0.5 +0.05
  0
6~8
3×3 3 3 - 6~36 3 1.8 0.9 8~10
4×4 4  0
-0.030
4  0
-0.030
7 8~45 4 +0.078
+0.030
2.5 1.2 +0.1
  0
10~12
5×5 5 5 8 0.25
~0.40
10~56 5 0.16
~0.25
3.0 1.7 12~17
6×6 6 6 10 14~70 6 3.5 2.2 17~22
(7×7) 7  0
-0.036
7.2  0
-0.036
10 16~80 7 +0.098
+0.040
4.0 3.0 20~25
8×7 8 7  0
-0.090
h11 11 18~90 8 4.0 2.4 +0.2
  0
22~30
10×8 10 8 12 0.40
~0.60
22~110 10 0.25
~0.40
5.0 2.4 30~38
12×8 12  0
-0.043
8 12 28~140 12 +0.120
+0.050
5.0 2.4 38~44
14×9 14 9 14 36~160 14 5.5 2.9 44~50
(15×10) 15 10.2  0
-0.070
h10 15 40~180 15 5.0 5.0 +0.1
  0
50~55
16×10 16 10  0
-0.090
h11 16 45~ 180 16 6.0 3.4 +0.2
  0
50~58
18×11 18 11  0
-0.110
18 50~200 18 7.0 3.4 58~65
20×12 20  0
-0.052
12 20 0.60
~0.80
56~220 20 +0.149
+0.065
0.40
~0.60
7.5 3.9 65~75
22×14 22 14 22 63~250 22 9.0 4.4 75~85
(24×16) 24 16.2  0
-0.070
h10 24 70~280 24 8.0 8.0 +0.1
  0
80~90
25×14 25 14  0
-0.110
h11 22 70~280 25 9.0 4.4 +0.2
  0
85~95
28×16  28 16 25 80~320 28 10.0 5.4 95~110
32×18 32  0
-0.062
18 28 90~360 32 +0.180
+0.080
11.0 6.4 110~130



Customer Service

  • Usage Method
  • Technical Question
  • Customization Products

NBK America LLC

8:00 to 17:00 on weekdays, Eastern Standard Time