Mayr ROBA-servostop 8980.00 00, Operational Instructions

Page: 21 / 26

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 21 of 26 www.mayr.com , E-Mail: public.mayr@mayr.com
your reliable partner
9 Installation
9.1 Installation Conditions
Please observe before installation!

The eccentricity of the shaft end in relation to the
mounting pitch circle must not exceed 0.2 mm.

The positional tolerance of the threads for the
customer-side fixing screws must not exceed 0.2
mm.

The axial run-out deviation of the screw-on surface to
the shaft must not exceed the permitted axial run-out
tolerance according to DIN 42955 of 0.08 mm up to
size 100 and 0.1 mm from size 120. The reference
diameter is the pitch circle diameter for securement
of the brakes.
Larger deviations can lead to a drop in torque, to
continuous grinding of the rotor (4) and to
overheating.

The rotor (4) and brake surfaces must be oil and
grease-free.

The shaft tolerance must be selected so that the hub
toothing (6) is not widened. Widening of the toothing
leads to the rotor (4) jamming on the hub (6) and
therefore to brake malfunctions.
Recommended shaft tolerance: k6.
The max. permitted joining temperature of 150 °C
must not be exceeded.

The toothings of the hub (5) and the rotor (4) must
not be oiled or greased.

Select the screw length so that the max. screw-in
depth for thread s
1
(see 5.2.5 ) is not exceeded. Due
to the long screws (see Item 11 in 4.4 parts list), the
armatur
e disk’s stroke can be impaired. It may not or
only partially be possible to release the brake. This
can lead to continuous grinding or an unintended
drop-out of the armature disk (2).

The tensile strength R
m
of the attachment wall must
be at least 300 N/mm². Lower strength values must
be approved by
mayr
®
power transmission.

Observe the installation dimension I
2
as per Chapter
5.2.5 in the design to minimize the installation effort.
Recommendation
Observe the suggested min. radial distance
of magnetic conductive material around the
coil carrier (1) and the armature disk (2), see
5.2.1 , for the outer and inner dimension (for
example, housing and/or shaft)!
Possible consequences of non-observance:
Too little distance can affect the magnetic
functionality of the brake.
Recommendation
Axial undercut is recommended:
At the transition of the end face of a shaft
shoulder (if available) and the shaft section
that receives the hub (6).
This ensures a flat and defined contact of
the hub (6).
9.2 Installation
9.2.1 Pre-requisites

Unpack the brake

Check for completeness

Check the data on the Type tag

Visual inspection (e.g. after longer storage period)
9.2.2 Preparation

Have the necessary tools ready
- Spanners or hexagon socket wrench etc.
- Torque wrenches

Provide fixing screws (not included in the
standard scope of delivery)

Check installation dimension I
2
as per Chapter
5.2.5 and Figure 3.
9.2.3 Protection against electric shock
If the brake is opened electrically for installation onto the
motor, protective measures against electric shock must
be taken in accordance with DIN EN 61140 and EN
50191.

See also DGUV Regulation 3 and DGUV
Information 203-034.See also DGUV Regulation
3 and DGUV Information 203-034.
All tightening torques are recommendations only. These
data do not relieve the user from checking the data
regarding the actual installation situation.