Date Published:Jun. 18. 2015 Date Updated:Jan. 27. 2025
Key and Their Corresponding Keyways

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 |
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