Installation and operational instructions for
ROBA
®
-servostop
®
Type 8980.00_00
Sizes 50 - 160
(B.8980.EN)
06/10/2022 GF
Chr. Mayr GmbH + Co. KG
Eichenstraße 1, D-87665 Mauerstetten
Phone: +49 8341 804-0, Fax: +49 8341 804-421
Page 14 of 26
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5.2
Technical Data
5.2.1
General
Technical Data
Size
50
60
70
80
90
100
120
140
160
Nominal braking torque
1) 2) 3) 4)
M
N
[Nm]
1.5
3.1
5.3
7
9.8 15.5
30
60
100
Coil voltage
U
[VDC]
24
24
24
24
24
24
24
24
24
Electrical power
P20
[W]
9.5
11.7 15.1 17.8 22.2 27.7 32.4
43.0
60.5
Maximum speed
n
max
[rpm]
9500 8000 7000 6500 5500 5000 4000 3500 3000
Max. idle speed
[rpm]
20000 16500 14500 12500 11500 9500 7500 6500 5500
Weight at d
max
[kg]
0.34 0.47 0.66 0.89 1.29 1.7
2.66
4.37
6.11
Total mass moment of inertia at d
max
J
[10
-6
kgm²]
2.59 5.65 11.54 17.94 30.95 71.88 182.02 438.96 895.57
Recommended min. radial distance of magnetically
conductive materials in the area of the coil carrier
(1) and the armature disk (2)
[mm]
1
1.25 1.25
1.5
1.5 1.75 1.75
1.75
3
5.2.1.1 Explanations
1) Braking torque tolerance: + 75 %
2) Suitable for a temperature of 0 up to 60 °C: For higher temperatures, please consider the following braking torque
reductions:
>60 °C to 80 °C: 10 % reduction
>80 °C to 100 °C:
20 % reduction
>100 °C to 120 °C:
30 % reduction
For temperatures of -20 to 0 °C:
Observe the “Ambient temperature/Climate conditions” section
in the operational instructions!
3) The braking torque values are based on friction values determined in tests at
mayr
®
power transmission. As a friction
system is influenced by many parameters, such as mounting situation, temperature, ambient conditions, run-in condition,
wear, switching work, sliding speed, aging, contamination, etc., deviating braking torques are possible. The specified
nominal braking torque is a lower limit which is very likely to be reached, but cannot be guaranteed due to the many
possible influences. The fluctuations in braking torques must be taken into account during dimensioning by providing
appropriate safety measures. Specially for critical applications, it is important to consult
mayr
®
power transmission and
carry out an appropriate application check.
4) Remarks and recommendations regarding the dimensioning and selection of brakes (e.g., based on load torque and
test torque):
See the document “Hinweise und
Empfehlungen zum statischen
Bremsentest” (Remarks and suggestions
regarding static brake tests) on our
website under ROBA
®
-servostop
“Downloads”.
