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T-Slot Profile Design per. BS 2485

Engineering ANSI Hardware Design Data
Engineering Metric Hardware Design Data

T-Slot Profile Design per. BS 2485

T-Slot Profile Design per. BS 2485

Dimensions in mm
(avoid pitch values in brackets as they lead to weakness)

Designations
of T-slot
Width of
throat
A1
Depth of
recess
c1
Width
of
recess
B1
Overall
depth of
T-slot H
Chamfer 45°
or radius
Pitch
P
 
Nominal
Ordinary
(H12)
For
use
as
tenon
(HB)
K
max.
F
max.
G
max.
min..
max.
min.
max.
min.
max
M4
M5
5
6
+0.12
0
+0.18
0
10
11
11
12.5
3.5
5
4.5
6
8
11
10
13
1.0
1.0
0.6
0.6
1.0
1.0
 
20
25
25
62
32
40
M6
M8
8
10
+0.15
0
+0.22
0
14.5
16
16
18
7
7
8
8
15
17
18
21
1.0
1.0
0.6
0.6

1.0
1.0

  32
40
40
50
50
63
M10
M12
M16

12
14
18

+.018
0
+0.022
0
19
23
30
21
25
32
8
9
12
9
11
14
20
23
30
25
28
36
1.0
1.0
1.0
 
0.6
1.0
1.0
1.0
1.0
1.0
(40)
(50)
(63)
50
63
80
63
80
100
80
100
125
M20
M24
22
28
+0.21
0
+.027
0
37
46
40
50
16
20
18
22
38
48
45
56
1.6
2.5
1.0
1.0
1.0
1.0
(80)
100
100
125
125
160
160
200
M30
M36
M42
36
42
48
+0.25
0
+0.033
0
56
68
80
60
2
85
25
32
36
28
35
40
61
74
84
71
85
95
2.5
2.5
2.5
1.0
1.6
2.0
1.0
4.0
6.0
125
160
200
160
200
250
200
250
320
250
320
400
M48
54
+0.30
0
+.046
0
90
95
40
44
94
106
2.5 2.0 6.0 250 320 400 500

Tolerance of T-slots

Pitch
mm
Tolerance
mm
20 to 25
±0.2
32 to 100
±0.3
125 to 250
±0.5
320 to 500
±0.8
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