Nexen MTL2055 976889 - Manual (Page 6)

FORM NO. L-21219-D-0610 6
Disengagement Torque Setting
Nexen torque limiters are factory set to minimum disengagement torque within a specific range, which is marked
on the MTL. The adjustment range (min/max) is also marked on the adjustment ring. The customer can adjust the
disengagement torque as long as it falls into the range (12 )indicated on the adjustment ring.
CW
CCW
DIN 1816
Positive Stop
Spring has a
steeper angle
(not as flat).
Adjust nut flush
with hub end.
Flattens spring.
Adjustment stops
at shoulder.
CW Rotation Decreases Torque
CCW Rotation Increases Torque
Figure 4
1 Adjustment Nut
11 Fastening Screw /
Plastic cushion not shown
3 Steel Actuation Ring
12 Adjustment Range
13 Marking
CAUTION
Nexen torque limiters incorporate disc springs that
exhibit a special spring characteristic. It is important
to stay in the max-min range of the MTL.
To adjust the disengagement torque, loosen the
locking screws (11) and rotate the adjustment ring
using the spanner wrench to the desired new setting.
Tighten set screws and test the torque limiter. Note:
The set screws are used with plastic inserts to
prevent hub thread damage.
Actuation Path Adjustment Range
Spring Path
S
pr
in
g
Fo
rc
e
T min
KN
T max
CN
Figure 5
Coupling Adapters - For Inch-Bored, Elastomer (Spider) Couplings
Figure 6
Series A B C D E F Fastener Tightening
Torque
15
37
[1.465]
20
[0.787]
13
[0.520]
19.05
[0.750]
12
[0.480]
56
[2.205]
M4
4 Nm
[3 ft/lbs]
30
44
[1.740]
22
[0.866]
18
[0.697]
19.05
[0.750]
12
[0.480]
64
[2.520]
M5
4 Nm
[3 ft/lbs]
60
48
[1.886]
25
[0.984]
17
[0.665]
25.40
[1.000]
17
[0.669]
74
[2.913]
M5
7 Nm
[5 ft/lbs]
150
52
[2.063]
25
[0.984]
20
[0.803]
25.40
[1.000]
17
[0.669]
90
[3.543]
M6
12 Nm
[9 ft/lbs]
200
68
[2.677]
40
[1.575]
22
[0.846]
38.10
[1.500]
17
[0.669]
98
[3.858]
M6
14 Nm
[10 ft/lbs]
300
73
[2.854]
40
[1.575]
25
[0.984]
38.10
[1.500]
17
[0.669]
114
[4.488]
M8
18 Nm
[13 ft/lbs]
500
82
[3.209]
40
[1.575]
33
[1.299]
38.10
[1.500]
26
[1.024]
128
[5.039]
M8
25 Nm
[18 ft/lbs]
800
92
[3.630]
50
[1.969]
31
[1.228]
50.80
[2.000]
31
[1.221]
140
[5.512]
M10
36 Nm
[27 ft/lbs]
1500
99
[3.894]
50
[1.969]
39
[1.532]
50.80
[2.000]
31
[1.221]
170
[6.693]
M12
70 Nm
[52 ft/lbs]
2500
143
[5.638]
80
[3.150]
51
[2.016]
76.20
[3.000]
51
[2.005]
240
[9.449]
M16
180 Nm
[132 ft/lbs]
Table 2