Mayr EAS-Compact 49 Series Quick start guide

Installation and Operational Instructions for
EAS®-Compact®overload clutch, Type 49_._ _4._ Sizes 4 and 5 (B.4.14.2.GB)
05/09/2011 TK/GH/SU Chr. Mayr GmbH + Co. KG Tel.: 08341 / 804-0
Eichenstraße 1 Fax: 08341 / 804-421
87665 Mauerstetten http://www.mayr.com
Page 1 of 10 Germany E-Mail: [e-mail]
Please read these Operational Instructions carefully and follow them accordingly!
Ignoring these Instructions may lead to malfunctions or to clutch failure, resulting in damage to other parts.
Contents:
Page 1: - Contents
- Safety and Guideline Signs
- Safety Regulations
Page 2: - Clutch Illustrations
- Parts List
Page 3: - Technical Data
Page 4: - Design
- State of Delivery
- Function
- Re-engagement
- General Installation Guidelines
- Installation of the Output Elements
Page 5: - Mounting onto the Shaft
- De-installation
- Shaft Installation via Key Connection
- Cup Spring Layering
- Joining Both Clutch Hubs Type 494.-
Page 6: - Permitted Shaft Misalignments Type 494.-
- Coupling Alignment Type 494.-
Page 7: - Torque Adjustment
Page 8: - Limit Switch
- Limit Switch Installation
- Maintenance and Inspection Intervals
- Disposal
Page 9: - Malfunctions / Breakdowns
Page 10: - Malfunctions / Breakdowns
Safety and Guideline Signs
CAUTION
Danger of injury to personnel and
damage to machines.
Please Observe!
Guidelines on important points.
According to German notation, decimal points
in this document are represented with a
comma (e.g. 0,5 instead of 0.5).
Safety Regulations
These Installation and Operational Instructions (I + O) are part of the clutch delivery.
Please keep them handy and near to the clutch at all times.
It is forbidden to start use of the product until you have ensured that all applicable EU directives and directives for the
machine or system into which the product has been installed have been fulfilled.
At the time these Installation and Operational Instructions go to print, the EAS®-clutches accord with the known technical
specifications and are operationally safe at the time of delivery.
Without a conformity evaluation, this product is not suitable for use in areas where there is a high danger of explosion.
This statement is based on the ATEX directive.
CAUTION  If the EAS®-clutches are modified.
 If the relevant standards for safety and / or installation conditions are ignored.
User-implemented Protective Measures
 Cover all moving parts to protect against seizure, dust or foreign body impact.
 The clutch may not be put into operation without a limit switch unless mayr ®has been contacted and has agreed
otherwise.
To prevent injury or damage, only professionals and specialists should work on the devices, following the
relevant standards and directives. Please read the Installation and Operational Instructions carefully before
installation and initial operation of the device.
These Safety Regulations are user hints only and may not be complete!

Installation and Operational Instructions for
EAS®-Compact®overload clutch, Type 49_._ _4._ Sizes 4 and 5 (B.4.14.2.GB)
05/09/2011 TK/GH/SU Chr. Mayr GmbH + Co. KG Tel.: 08341 / 804-0
Eichenstraße 1 Fax: 08341 / 804-421
87665 Mauerstetten http://www.mayr.com
Page 2 of 10 Germany E-Mail: [e-mail]
Design with keyway Type 490. _ 24. _
Fig. 1 Fig. 2
Design with flexible coupling part Type 494. _ _ 4. _
Fig. 3
Parts List (Only use mayr® original parts)
1 Hub EAS®
2 Pressure flange
3 Thrust washer
4 Thrust ring
5 Supporting ring
6 Intermediate disk
7 Adjusting nut
7.1 Set screw
8 Deep groove ball bearing
9 Locking ring
10 Steel ball
11 Cup spring
12 Steel ball
13 Sealing cover
14 Engagement washer
15 Cap screw
16 Cone bushing
17 Hexagon head screw
18 Type tag
19 Limit switch
Additional parts for Type 494. _ _ 4._:
20 Flange
21 Cap screw
22 Cap screw
23 Claw ring
24 Flexible intermediate ring
(elastomeric element)
25 Hub lastic
26 Adjusting screw
 The limit switch Item 19 is not included in the standard delivery.
 Secure the set screws Item 7.1 with Loctite 243.
Design with cone bushing
Type 490. _ 14. _
16
17
2
13
3
11
6
7.1
7
1
5
12
4
15
14
M - 4x90°
8
9
18
Facing direction
Dimension "a"
Stroke
Please Observe!
Remove the screws
after re-engagement,
otherwise no
overload function!
Max. screw-in depth
in pressure flange
Thread in pressure flange
25
26
21
20
22
24
23
Z
Flex. part EAS-part

Installation and Operational Instructions for
EAS®-Compact®overload clutch, Type 49_._ _4._ Sizes 4 and 5 (B.4.14.2.GB)
05/09/2011 TK/GH/SU Chr. Mayr GmbH + Co. KG Tel.: 08341 / 804-0
Eichenstraße 1 Fax: 08341 / 804-421
87665 Mauerstetten http://www.mayr.com
Page 3 of 10 Germany E-Mail: [e-mail]
Technical Data
Table 1:
Limit torques for overload MGBore from – to
Size Type 490.5_4._ [Nm] Type 490.6_4._ [Nm] Type 490.7_4._ [Nm]
Max.
speed
[rpm]
Stroke of the
thrust washer
with sealing
cover
(Fig. 1;
Items 3/13)
on overload
[mm] Type 490._14._ [mm] Type 490._24._ [mm]
4 175 – 350 350 – 700 700 – 1400 3000 5,5 42 – 65 40 – 70
5 350 – 700 700 – 1400 1400 – 2800 2000 7,0 50 – 75 45 – 90
Table 2:
Type 49_.5_4._ Type 49_.6_4._ Type 49_.7_4._
Size
Maximum
torque MG
[Nm]
Inspection
dimension "a"
(Fig. 1)
at approx.
70 % MG
[mm]
Maximum
torque MG
[Nm]
Inspection
dimension "a"
(Fig. 1)
at approx.
70 % MG
[mm]
Maximum
torque MG
[Nm]
Inspection
dimension "a"
(Fig. 1)
at approx.
70 % MG
[mm]
4 350 12,4 700 10,4 1400 6,2
5 700 13,6 1400 11,2 2800 6,1
Table 3:
Screw tightening torques
Size
Thread in the
pressure flange
(Fig. 1)
Max. screw-in depth in
the pressure flange (2)
(Fig. 1)
[mm]
Thread "M" in the
engagement washer
(14)
(Fig. 1)
Item 7.1 [Nm] Item 17 [Nm] Item 21 [Nm] Item 22 [Nm]
4 6 x M12 20 4 x M8 4,1 40 120 75
5 6 x M16 22 4 x M10 8,5 60 175 120
Table 4:
Max. permitted Bore lastic-side Type 494._ _ 4._ Nominal torque TKN for flexible, backlash-free shaft coupling on Type 494._ _ 4._
Size Axial forces [N] Radial forces [N]
Transverse
force torques
1)
[Nm] from – to [mm] TKN [Nm] TKN max. [Nm]
4 4800 4800 50 58 – 95 1500 3100
5 7700 7700 70 65 – 110 2400 4800
1) Torques, which put strain on the deep groove ball bearing due to the non-centric axial forces having an effect on the pressure flange.
Table 5:
Connection dimensions
(Fig. 4, page 4)
Size a +0,1 [mm] e 2) [mm]
4 13 160 h5
5 14 180 h5
2) User-side tolerance H7

Installation and Operational Instructions for
EAS®-Compact®overload clutch, Type 49_._ _4._ Sizes 4 and 5 (B.4.14.2.GB)
05/09/2011 TK/GH/SU Chr. Mayr GmbH + Co. KG Tel.: 08341 / 804-0
Eichenstraße 1 Fax: 08341 / 804-421
87665 Mauerstetten http://www.mayr.com
Page 4 of 10 Germany E-Mail: [e-mail]
Design
The EAS®-Compact®overload clutch is designed as a
mechanical disengaging overload clutch according to the ball
detent principle.
State of Delivery
The clutch is manufacturer-assembled and set to the torque
stipulated in the order.
Unless the customer requests a particular torque setting, the
clutch will be pre-set to approx. 70 % of the maximum torque.
The 4 locking set screws (7.1) do not have screw securement on
a pre-set clutch.
Before initial operation of the clutch, please
secure the locking set screws (7.1) with
Loctite 243.
Please check state of delivery!
Function
The clutch protects the drive line from excessively high,
unpermitted torque impacts which can occur due to unintentional
blockages. After overload has taken place, the transmitting
mechanism is completely disconnected. Only the bearing friction
continues to have an effect.
This means that no re-engagement impacts or metallic sliding
movements occur on the clutch torque transmission geometries
when using this clutch variant.
When in operation, the set torque is transmitted backlash-free
onto the output from the motor shaft via the EAS®-Compact®
overload clutch (pressure flange (2)). If the set limit torque is
exceeded (overload), the clutch disengages. The input and the
output are separated residual torque-free.
An installed limit switch registers the disengagement movement
and switches off the drive.
After-acting masses can run free.
CAUTION
The clutch has no load-holding function after
overload occurrence!
Re-engagement
Re-engagement must only take place when
the device is not running or at low differential
speeds (< 10 rpm).
Re-engagement of the EAS®-Compact®overload clutch takes
place using 4 hexagon head screws (Fig. 1; provided customer-
side: M8 for Size 4; M10 for Size 5), evenly screwed into the
engagement washer (14) by placing axial pressure on the
sealing cover (13).
It may be necessary to twist slightly between the pressure flange
(2) and the thrust washer (3) incl. sealing cover (13).
CAUTION After re-engagement has taken place, the 4
hexagon head screws must be removed
immediately, as they could stop the clutch
functioning (blockage).
General Installation Guidelines
The bore tolerances in the hub (1) and the hub lastic (25) are
stated as H7, the surface roughness depth in the bores is stated
as Ra = 1,6 µm.
Installation of the Output Elements (Fig. 4)
The output element is centred on the deep groove ball bearing
(8) (tolerance H7/h5) and screwed together with the pressure
flange (2).
Please observe the maximum screw-in depth
in the pressure flange (Item 2 / Fig. 1 and
Table 3).
If the resulting radial force from the output element is anywhere
near the centre of the ball bearing (8) and under the max.
permitted radial load acc. Table 4, an additional bearing for the
output element is not necessary.
No appreciable axial forces (see Table 4) should be
transferred from the output element onto the clutch
pressure flange (2).
For extremely wide output elements or for elements with a small
diameter, we recommend the EAS®-Compact®with long
protruding hub (Type 490._ _ 4.1).
On very small diameters, the output element is screwed together
with the clutch pressure flange (2) via a customer-side
intermediate flange.
Ball bearings, needle bearings or bearing bushings are suitable
as bearings for the output element, depending on the installation
situation and the installation space.
In order to prevent the output element (pressure flange (2))
from moving axially in the direction of the thrust washer (3)
during overload, please make sure that the bearing of the
output element is designed as a location bearing (Fig. 4).
Please observe the connection dimensions "a"
and "e" for the output elements acc. Fig. 4 and
Table 5, page 3.
Fig. 4
Type 490.624.0
2
8
16
1
17
3
19
a
e

Installation and Operational Instructions for
EAS®-Compact®overload clutch, Type 49_._ _4._ Sizes 4 and 5 (B.4.14.2.GB)
05/09/2011 TK/GH/SU Chr. Mayr GmbH + Co. KG Tel.: 08341 / 804-0
Eichenstraße 1 Fax: 08341 / 804-421
87665 Mauerstetten http://www.mayr.com
Page 5 of 10 Germany E-Mail: [e-mail]
Mounting onto the Shaft
EAS®-Compact® clutches include manufacturer-installed cone
bushings or keyways as part of the standard delivery.
Please observe the following when mounting cone
bushings:
 Shaft tolerances from h8 to k6 are permitted.
 Shaft surface: finely turned or ground
(Ra = 0,8 µm)
 Shaft material: yield point at least 400 N/mm2,
e.g. St 60, St 70, C 45, C 60.
 Degrease or remove preservation layers on the shafts and
bores before installing the clutch.
Greasy or oily bores or shafts do not transmit the torque
TRspecified on order.
 Mount the clutch or clutch hubs onto both shaft ends using a
suitable device and bring it / them into the correct position.
 Tighten the tensioning screws (17) in steps (in 3 to max. 6
tightening sequences) evenly using a torque wrench to the
torque stated in Table 3.
The clutch or the clutch hub carries out an axial
movement in the direction of the cone bushing
(16) when tightening the cone bushing (16).
De-installation
In the cone bushing (16), tapped extracting holes are located
next to the tensioning screws (17).
1) Loosen all tensioning screws (17) by several thread turns.
2) Screw out the tensioning screws (17) located next to the
tapped extracting holes and screw them into the tapped
extracting holes up to their limits.
Then tighten these screws until the tensioning connection
loosens.
Shaft Installation via Key Connection
On the EAS®-Compact®with keyway, the clutch must be secured
axially after mounting onto the shaft, e.g. using a press cover
and a screw, screwed into the shaft threaded centre hole
(EAS®-side) and/or a set screw (adjusting screw (26), lastic-side,
see Fig. 3).
Cup Spring Layering (Fig. 5)
Correct cup spring layering is a prerequisite for problem-free
clutch function and torque adjustment.
For all sizes, one cup spring (Type 49_.5_4._) is installed for the
lower torque range. For the medium torque range, two cup
springs (Type 49_.6_4._) and for the high torque range four cup
springs (Type 49_.7_4._) are installed.
Fig. 5
Joining Both Clutch Hubs (1/25)
EAS®-Compact® Type 494._ _ 4._ (Fig. 3)
Due to the pre-tensioning of the intermediate ring (24), axial
installation force is required for joining both clutch hubs (1
and 25).
The amount of force required can be reduced by lightly greasing
the intermediate ring (24).
Use PU - compatible lubricants (e.g. Vaseline).
Do not place axial pressure on the intermediate
ring (24) in fully installed state.
Please observe the distance dimension "Z"
acc. Fig. 3 and Table 6.
Table 6
Size 4 Size 5
Dimension "Z" (Fig. 3) [mm]
4 4
Layered 1x
Layered 2x
Layered 4x
Type 49_ .7_ 4._
Type 49_ .6_ 4._Type 49_ .5_ 4._

Installation and Operational Instructions for
EAS®-Compact®overload clutch, Type 49_._ _4._ Sizes 4 and 5 (B.4.14.2.GB)
05/09/2011 TK/GH/SU Chr. Mayr GmbH + Co. KG Tel.: 08341 / 804-0
Eichenstraße 1 Fax: 08341 / 804-421
87665 Mauerstetten http://www.mayr.com
Page 6 of 10 Germany E-Mail: [e-mail]
Permitted Shaft Misalignments Type 494.-
EAS®-Compact®clutches Type 494._ _ 4._ (lastic backlash-free)
compensate for angular, axial and radial shaft misalignments
(Fig. 6) without losing their backlash-free function. However, the
permitted shaft misalignments indicated in Table 7 must not
simultaneously reach their maximum value. If more than one
kind of misalignment takes place simultaneously, they influence
each other. This means that the permitted misalignment values
are dependent on one another, see Fig. 7.
The sum total of the actual misalignments in percent of the
maximum value must not exceed 100 %.
The misalignment values given in Table 7 refer to clutch
operation at nominal torque, an ambient temperature of +30 °C
and a operating speed of 1500 rpm. If the clutch is operating in
other or more extreme operating conditions, please contact the
manufacturers.
Table 7
Max. permitted
shaft misalignments
for Type 494. - - 4. - Size 4 Size 5
"x" [mm]
± 1,5 ± 2
"y" [mm]
± 0,3 ± 0,3
"∆z" [mm]
0,3 0,3
"α
αα
α" [°]
0,09 0,07
Type 494._ _ 4._ (lastic backlash-free)
Axial Radial Angular
displacement misalignment misalignment
Fig. 6
Coupling Alignment Type 494.-
Exact alignment of the coupling reduces the load on the shaft
bearings and increases the coupling lifetime greatly.
We recommend alignment of the coupling using a dial gauge or
special laser on drives operating at very high speeds.
However, in most of the applications, coupling alignment using a
straight edge in two levels vertical to each other is sufficient.
Fig. 7
20
30%
25%
75%
0%
50%
20
40%
40
30%
60
60
80
80
100
100
∆
z
Angular misalignment
[%]
x
[%] Axial displacement
y
[
%
]
R
a
d
i
a
l
m
i
s
a
l
i
g
n
m
e
n
t
∆
z
α
Z
1
Z
2
y
x
Differential dimension z = z - z
dimensions z and z , m
vertically and horizontally
1 2
1 2
easure offset
by 180°
∆

Installation and Operational Instructions for
EAS®-Compact®overload clutch, Type 49_._ _4._ Sizes 4 and 5 (B.4.14.2.GB)
05/09/2011 TK/GH/SU Chr. Mayr GmbH + Co. KG Tel.: 08341 / 804-0
Eichenstraße 1 Fax: 08341 / 804-421
87665 Mauerstetten http://www.mayr.com
Page 7 of 10 Germany E-Mail: [e-mail]
Torque Adjustment (Figs. 8, 9, and 10)
Torque adjustment is carried out by turning the adjusting nut (7).
The installed cup springs (11) are operated in the negative range
of the characteristic curve (see Fig. 10). This means that
tightening the adjusting nut (7) causes the spring force to
decrease, and loosening the adjusting nut (7) causes the spring
force to increase.
If no particular torque adjustment is requested customer-side,
the clutch will always be pre-set and marked (calibrated) to
approximately 70 % of the maximum torque.
It is possible to check the "Spring operation in the operating
range" (Fig. 10) using the dimension "a" (distance from the
adjusting nut, facing side (7) to the hub edge (1) (Fig. 8)).
Please see Table 2 for the respective values.
Turning the adjusting nut (7) clockwise causes
a reduction in torque.
Turning it anti-clockwise causes an increase in
torque.
You should be facing the adjusting nut (7) as
shown in Fig. 8 and Fig. 9.
Changing the Torque
1) Please convert the required torque using the formula below
into percent of the maximum adjustment value (see Table
2).
Required torque adjustment
Max. torque adjustment (Table 2) x 100 = Adjustment in %
2) Loosen the 4 set screws (7.1) in the adjusting nut (7).
3) Turn the adjusting nut (7) using the engraved adjustment
scale (Fig. 9) clockwise or anti-clockwise using a hook or a
face wrench until the required torque is reached.
4) The required torque results from the marking overlap on the
hub (1) and the percent value on the adjusting nut (7)
(Fig. 9).
Alternatively, the torque can also be adjusted using
dimension "a" (Fig. 8) acc. Adjustment Diagram (request at
the place of manufacture, if required).
5) Paint the 4 locking set screws (7.1) with Loctite 243, screw
them in and tighten them.
Please observe the tightening torque acc. Table 3.
Fig. 8
Fig. 9
Fig. 10
Adjusting the adjusting nut (7) or distorting the
cup springs (11) outside of the cup spring
characteristic curve (see Fig. 10) stops the
clutch functioning.
The inspection dimension "a" can show
deviations due to construction tolerances or to
clutch wear.
11
6
7.1
7
1
Facing
direction
Dimension "a"
+
-
T
o
r
q
u
e
Path to
operating range
F
o
r
c
e
F
Graph of
spring characteristic
curve
Operating
range Spring path S

Installation and Operational Instructions for
EAS®-Compact®overload clutch, Type 49_._ _4._ Sizes 4 and 5 (B.4.14.2.GB)
05/09/2011 TK/GH/SU Chr. Mayr GmbH + Co. KG Tel.: 08341 / 804-0
Eichenstraße 1 Fax: 08341 / 804-421
87665 Mauerstetten http://www.mayr.com
Page 8 of 10 Germany E-Mail: [e-mail]
Limit Switch (Item 19; Figs. 1 and 11)
In order to limit run-out times after overload has taken place, a
limit switch must be mounted onto the overload clutch.
The contactless limit switch is to be mounted onto the switching
edge of the clutch (Fig. 11) so that no signal changes are caused
during normal operation on the limit switch by the usual clutch
run-out errors.
In case of overload, the thrust washer (3) incl. sealing cover (13)
carries out a stroke (see Table 1) in the direction of the
engagement washer (14) (Figs. 1 and 11), which is used to
change the signal on the limit switch. The signal change should
take place at the latest after an axial stroke of the thrust washer
(3) incl. the sealing cover (13) of 0,5 mm. At the same time,
please maintain a radial minimum distance of 0,5 mm in order to
prevent start-up of the contactless limit switch.
Limit Switch Installation
Adjust the switch distances for the contactless limit switch acc.
Fig. 11. The distance of the sealing cover (13) to the switching
point can be easily adjusted using a hexagon head screw,
wrench opening 7.
Contactless limit switch (attachment example)
Fig. 11
Maintenance and Inspection Intervals
The maintenance intervals refer to the set clutch torque, hub-
shaft connection and screw tightening torque inspections. The
specified tightening torques acc. Table 3 must be maintained.
Re-greasing work on the clutch may only be carried out by
specially-trained personnel and is only required in extreme
operating conditions such as very dusty or dirty conditions or at
very high operating speeds. In this case, the ball transmission
geometries must be re-greased.
The following maintenance and inspection intervals are to be
maintained:
1.) Visual inspections, installation parameter inspections
(tightening torques), clutch running behaviour, clutch
release, set torque
before initial operation.
2.) Visual inspections, tightening torque inspections, clutch
release inspections, torque inspections and, if necessary,
re-greasing
after 2000 hours, after 100 overload occurrences or at
the latest every 6 months.
Disposal
Electronic Components
(Limit switch):
Products which have not been disassembled can be disposed of
under Code No. 160214 (mixed materials) or components under
Code No. 160216, or can be disposed of by a certified disposal
firm.
All steel components:
Steel scrap (Code No. 160117)
All aluminium components:
Non-ferrous metals (Code No. 160118)
Seals, O-rings, V-seals, elastomers:
Plastic (Code No. 160119)
SW7
0
,
5
3

Installation and Operational Instructions for
EAS®-Compact®overload clutch, Type 49_._ _4._ Sizes 4 and 5 (B.4.14.2.GB)
05/09/2011 TK/GH/SU Chr. Mayr GmbH + Co. KG Tel.: 08341 / 804-0
Eichenstraße 1 Fax: 08341 / 804-421
87665 Mauerstetten http://www.mayr.com
Page 9 of 10 Germany E-Mail: [e-mail]
Malfunctions / Breakdowns
Malfunction Possible Causes Solutions
Incorrect torque adjustment
Adjustment nut
has changed position
Premature clutch
release
Worn clutch
1) Set the system out of operation
2) Check the torque adjustment
3) Secure the adjusting nut
4) If the cause of malfunction cannot be found, the clutch must
be inspected at the place of manufacture
Incorrect torque adjustment
Adjustment nut
has changed position
Disengagement mechanism blocked by a
foreign body
Clutch does not
release on overload
Worn clutch
1) Set the system out of operation
2) Check whether foreign bodies influence the disengagement
mechanism function
3) Check the torque adjustment
4) Secure the adjusting nut
5) If the cause of malfunction cannot be found, the clutch must
be inspected at the place of manufacture
Bearing on output flange is worn or has
been previously damaged
Running noises on
overload occurrence
as clutch slows down Worn disengagement mechanism
1) Set the system out of operation
2) Inspect the clutch at the place of manufacture
Insufficient clutch securement
Loosened screws
Running noises in
normal operation
Loosened adjusting nut
1) Set the system out of operation
2) Check the clutch securement
3) Check the screw tightening torques
4) Check the torque adjustment and that the adjusting nut sits
securely
Incorrect alignment
1) Set the system out of operation
2) Find / resolve the cause of incorrect alignment (e.g. loose
foundation screw, broken motor attachment, warmth
expansion of system components, changes in coupling
installation dimension "Z")
3) Check the coupling for wear
Worn elastomeric element,
temporary torque transmission
via metal contact
1) Set the system out of operation
2) Dismantle the coupling and remove the remainders of the
elastomeric element
3) Check the coupling parts and replace if damaged
4) Insert new elastomeric element, mount the coupling parts
5) Check the alignment and correct if necessary
Unbalance
1) Set the system out of operation
2) Check the balance condition of the system components and
correct if necessary
3) Check the coupling parts for wear
4) Check the alignment and correct if necessary
Changes in running
noise and / or
vibration occurrence
Type 494.-
Loose connection screws
1) Set the system out of operation
2) Check the coupling alignment
3) Tighten the connection screws to the required torque or
tighten the locking set screw and secure it against self-
loosening using sealing lacquer
4) Check the coupling for wear

Installation and Operational Instructions for
EAS®-Compact®overload clutch, Type 49_._ _4._ Sizes 4 and 5 (B.4.14.2.GB)
05/09/2011 TK/GH/SU Chr. Mayr GmbH + Co. KG Tel.: 08341 / 804-0
Eichenstraße 1 Fax: 08341 / 804-421
87665 Mauerstetten http://www.mayr.com
Page 10 of 10 Germany E-Mail: [e-mail]
Malfunctions / Breakdowns
Malfunction Possible Causes Solutions
Worn elastomeric element,
torque transmission via metal contact
1) Set the system out of operation
2) Replace the entire coupling
3) Check the alignment
Cam breakage due to high impact energy /
overloading
1) Set the system out of operation
2) Replace the entire coupling
3) Check the alignment
4) Find the cause of overload
Operating parameters are not appropriate for
the coupling performance
1) Set the system out of operation
2) Check the operating parameters and select a suitable
coupling (observe installation space)
3) Install a new coupling
4) Check the alignment
Cam breakage
Type 494.-
Operating errors on the system unit by
exceeding clutch characteristic data
1) Set the system out of operation
2) Check the coupling dimensioning
3) Replace the entire coupling
4) Check the alignment
5) Train and advise operating personnel
Incorrect alignment
1) Set the system out of operation
2) Find / resolve the cause of incorrect alignment
(e.g. loose foundation screw, broken motor attachment,
warmth expansion of system components, changes in
coupling installation dimension "Z")
3) Check the coupling for wear
4) Insert new elastomeric element
e.g. contact with
aggressive fluids / oils,
ozone influence,
too high ambient temperatures, etc,
which cause physical changes in the
elastomeric element
1) Set the system out of operation
2) Dismantle the coupling and remove the remainders of the
elastomeric element
3) Check the coupling parts and replace if damaged
4) Insert new elastomeric element, mount the coupling parts
5) Check the alignment and correct if necessary
6) Make sure that further physical changes in the elastomeric
element can be excluded
Premature wear of
the elastomeric
element
Type 494.-
The ambient or contact temperatures
permitted for the elastomeric element are
exceeded
1) Set the system out of operation
2) Dismantle the coupling and remove the remainders of the
elastomeric element
3) Check the coupling parts and replace if damaged
4) Insert new elastomeric element, mount the coupling parts
5) Check the alignment and correct if necessary
6) Check the ambient or contact temperature and regulate
them (possibly using other elastomeric element materials)
Premature wear of
the elastomeric
element (liquefied
material in the interior
of the elastomeric
element cams)
Type 494.-
Drive vibrations
1) Set the system out of operation
2) Dismantle the coupling and remove the remainders of the
elastomeric element
3) Check the coupling parts and replace if damaged
4) Insert new elastomeric element, mount the coupling parts
5) Check the alignment and correct if necessary
6) Determine the cause of vibration (maybe the problem can
be resolved by using an elastomeric element with lower or
higher shore hardness)
mayr ®will take no responsibility or guarantee for replacement parts and accessories which have not been delivered by
mayr ®, or for damage resulting from the use of these products.