Installation and Operational Instructions for
EAS
®
-HTL housed overload clutch, Type 4190._5400
Sizes 4 and 5
(B.4.15.8.EN)
14/04/2020 TK/GH/MD/SU
Chr. Mayr GmbH + Co. KG
Eichenstraße 1, D-87665 Mauerstetten, Germany
Phone: +49 8341 804-0, Fax: +49 8341 804-421
Page 6 of 12
Design
The EAS
®
-HTL overload clutch is designed as a mechanically
disengaging overload clutch, based on the ball detent principle. It
is designed as a housed clutch (Protection IP 53) for attachment
to an IEC B5 flange according to DIN EN 50347.
The connection dimensions are designed according to the motor
sizes 200, 225, 250, 280 and 315.
EAS
®
-HTL clutches as a complete unit provide overload
protection between the motor and the gearbox.
Scope of Delivery / State of Delivery
The clutch is manufacturer-assembled ready for installation.
The torque is set manufacturer-side according to the
customer's request (please compare the torque stipulated in
the order with the torque imprinted/engraved in the
identification).
Unless the customer requests a particular torque setting
when ordering, the clutch will be pre-set to approx. 70 % of
the maximum torque.
The adjusting nut (6) is marked with dimension “a” (70% of
the maximum torque, see Figs. 2 and 5).
The limit switch has been adjusted as capable of function
manufacturer-side.
Please check the scope of delivery according to the Parts List as
well as the state of delivery immediately after receiving the goods.
mayr
®
will take no responsibility for belated complaints.
Please report transport damage immediately to the deliverer.
Please report incomplete delivery and obvious defects
immediately to the manufacturer.
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.
In order to make the clutch ready for operation again after an
overload occurrence, the clutch must be re-engaged.
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 (1.2)).
If the set limit torque is exceeded (overload), the clutch
disengages and remains disengaged.
The input and output are separated residual torque-free.
A signal is emitted via the
limit switch (10)
which can be used to
shut down the entire system or machine.
After-acting masses can slow down freely.
CAUTION
After overload occurrence, the clutch has no
load-holding function.
General Installation Guidelines
Important!
EAS
®
-HTL clutches do not compensate for shaft
misalignments.
Do not introduce radial / axial forces onto the clutch bearing
due to component distortion.
Minimum screw quality 8.8 for customer-side attachment.
Please observe the max. permitted bearing loads acc.
Table 5.
The determination of the max. permitted
bearing load is based on a nominal lifetime
estimation of 32000 h according to the usual
specifications provided by the bearing
manufacturers.
Possible bearing distortion must be ruled out
via temperature measurement on the housing
in the deep groove ball bearing (6) area during
initial operation:
ΔT ≤ 40 °C
The steady-state temperature must be
evaluated.