Installation and Operational Instructions for EAS
®
-compact
®
Ratchetting clutch, Type 49_._ _0._
Size 4
Synchronous clutch, Type 49_._ _5._
Size 4
(B.4.14.4.EN)
17/03/2021 TK/GC/NU
Chr. Mayr GmbH + Co. KG
Eichenstraße 1, D-87665 Mauerstetten, Germany
Phone: +49 8341 804-0, Fax: +49 8341 804-421
Page 8 of 22
Design
The EAS
®
-compact
®
clutch is a mechanical overload clutch
according to the ball-detent principle.
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.
On
Type 496._ _ _._
, the misalignment-flexible part
(ROBA
®
-DS) must be separated for customer-side
installation from the overload clutch (EAS
®
-compact
®
) by
loosening the cap screws (18). In the as-delivered condition,
the cap screws (18) and the set screws (13) are not secured
with Loctite 243.
Before initial operation of the clutch, please
secure the set screws (13) and
cap screws (18)
(only on Type 496._ _ _._)
with Loctite 243.
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.
Function in normal operation
The EAS
®
-compact
®
clutch transfers the torque from a drive
shaft onto an output element which can be mounted onto the
clutch ball bearing-supported pressure flange (2).
The torque transmission takes place backlash-free for the entire
lifetime of the clutch.
The clutch Types 494. und 496. connect two shafts and
compensate for shaft misalignment.
Function in case of overload
If the set limit torque is exceeded (overload), the clutch
disengages, the thrust washer (3) carries out an axial hub
movement, a customer-side mounted limit switch (16) senses
this stroke movement and emits a signal to switch off the drive.
The residual torque is approx. 5 to max. 15 % of the set torque.
This means that the EAS
®
-compact
®
clutch is not load holding.
Once the overload is removed, the clutch becomes automatically
ready for operation again on reaching an engagement position.
Re-engagement:
The ratchetting division on the EAS
®
-compact
®
ratchetting clutch
Type 49_._ _0._
is
15°
The ratchetting division on the EAS
®
-compact
®
synchronous
clutch
Type 49_._ _5._
is
360°