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Parallel Key and Taper Keys Dimensions

Metric ISO Hardware
ANSI Engineering Design Hardware

Parallel Key and Taper Keys Dimensions and Sizes per. ISO 6885, Part 1, 6886 and 6887
Side fitting square and rectangular keys
Square and rectangular taper keys

Side fitting square and rectangular keys
Side fitting square and rectangular keys
Parallel key and keyway acc. to ISO 6885 Part 1

 

Square and rectangular taper keys
Square and rectangular tapper keys
Taper and round-ended sunk key and
keyway acc. to ISO 6886

Dimensions of parallel keys and taper keys

1) The tolerance zone for hub keyway width b for parallel keys with normal fit is ISO JS9 and with close fit ISO P9. The tolerance zone for shaft keyway width b with normal fit is ISO N9 and with close fit ISO P9.

2) Dimension h of the taper key names the largest height of the key, and dimension tz largest depth of the hub keyway. The shaft keyway and hub keyway dimensions according to ISO 6887 - taper keys with gib head - are equal to those in ISO 6886

Dimensions of Parallel Keys and Taper Keys

Diameter
d
Width
b
Height
h
Depth of
Keyway in
Shaft
t1
Depth of
Keyway in
Hub
t2
Lengths
Above
To
1)
2)
-
6885/1
6886
6887
2)
I1
6885/1
I
6886
6
8
2
2
1.2
1.0
0.5
6
20
6
20
8
10
3
3
1.8
1.4
0.9
6
36
8
36
10
12
4
4
2.5
1.8
1.2
8
45
10
45
12
17
5
5
3
2.3
1.7
10
56
12
56
17
22
6
6
3.5
2.8
2.2
14
70
16
70
22
30
8
7
4
3.3
2.4
18
90
20
90
30
38
10
8
5
3.3
2.4
22
110
25
110
38
44
12
8
5
3.3
2.4
28
140
32
140
44
50
14
9
5.5
3.8
2.9
36
160
40
160
50
58
16
10
6
4.3
3.4
45
180
45
180
58
65
18
11
7
4.4
3.4
50
200
50
200
65
75
20
12
7.5
4.9
3.9
56
220
56
220
75
85
22
14
9
5.4
4.4
63
250
63
250
85
95
25
14
9
5.4
4.4
70
280
70
280
95
110
28
16
10
6.4
5.4
80
320
80
320
110
130
32
18
11
7.4
6.4
90
360
90
360
130
150
36
20
12
8.4
7.1
100
400
100
400
150
170
40
22
13
9.4
8.1
110
400
110
400
170
200
45
25
15
10.4
9.1
125
400
125
400
200
230
50
28
17
11.4
10.1
140
400
140
400
230
260
56
32
20
12.4
11.1
160
400
-
-
260
290
63
32
20
12.4
11.1
180
400
Lengths
not
Determined
290
330
70
36
22
14.4
13.1
200
400
330
380
80
40
25
15.4
14.1
220
400
380
440
90
45
28
17.4
16.1
250
400
440
500
100
50
31
19.5
18.1
280
400

 

Lengths mm
l1 or l 		6 8 10 12 14 16 18 20 22 25 28 32 36 40 45 50 56 63 70 8090
90 100 110 125 140 160 180 200 220 250 280 320 360 400

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