HIWIN
2.3.10 Safety nut SEM
The safety nut comprises a ball thread unit and safety unit. The safety nut basically
works like a normal ballscrew nut. If the axial backlash is increased due to wear, ball
球失败或损失,线程安全的大学t comes into contact with the ball
thread. The nut cannot therefore break out. The normal function of the unit is guaran-
teed up to an axial backlash of 0.4 mm.
Areas of application:
○
°
Lifting equipment
○
°
Clamping fixtures
○
°
Lifting platforms
○
°
Elevators
Ball screw unit
Safety unit
90°
D3
B
22,5°
D2
Hole pattern 1
ds
d
32
90°
30°
30°
D3
B
Hole pattern 2
ds
!
32
D2
L1
P
L2
L
S
L3
-0,2
-0,3
D
D
D1
dk
ds
Table 2.15
Safety nut dimensions
Article number
ds
h6
P
D
g7
D1
D2
D3
Hole
pattern
L
L1
L2
L3
S
B
dk
Dyn.
load
C
dyn
[N]
Stat. load
C
0
[N]
R32-10T4-SEM
32
10
56
86
70
9
1
130
15
16
7、5
M6 × 1
66
27,8
40900
63200
R40-10T4-SEM
40
10
63
93
78
9
2
130
15
16
7、5
M8 × 1
70
35,8
46800
82500
R40-20T2-SEM
40
20
63
93
78
9
2
140
15
16
7、5
M8 × 1
70
35,8
23800
36400
R50-10T5-SEM
50
10
75
110
93
11
2
145
16
16
8,0
M8 × 1
85
45,8
63900
133300
R63-20T4-SEM
63
20
95
135
115
13,5
2
205
20
25
10,0
M8 × 1
100
55,4
105000
250000
R80-20T5-SEM
80
20
125
165
145
13,5
2
230
25
25
12,5
M8 × 1
130
72,4
161500
398000
Simply using a safety nut does not provide sufficient protection against a load being lowered unintentionally. The safety guidelines valid for the application must be observed. The
safety nut it is not a safety component according to the Machinery Directive.
○
°
Reduced axial play on request
○
°
Nuts with dirt wipers
○
°
Precision ground ball tracks
○
°
Left-handed nuts on request
R
32
10
T4
SEM
1200
1350
0,052
Order example:
Ballscrews
Peeled Ballscrews
106