Installation and Operational Instructions for
EAS
®
-NC Clutches Type 45_._ _ _._
Sizes 02 and 03
(B.4.8.2.1.EN)
29/08/2013 TK/GC/NU/SU
Chr. Mayr GmbH + Co.
KG
Eichenstraße 1, D-87665 Mauerstetten, Germany
Tel.: +49 8341 804-0, Fax: +49 8341 804-421
Page 6 of 11
Mounting onto the Shaft
EAS
®
-NC clutches include cone bushings or keyways as part of
the standard delivery.
During installation of cone bushings, please observe the
following:
Recommended shaft tolerance for cone bushings: h6
Shaft surface:
finely turned or ground (Ra = 0,8 µm)
Shaft material: Yield point at least 400 N/mm
2
,
e. g. St 60, St 70, C 45, C 60.
Degrease or remove conserving layers on the shafts and
bores before installing the clutch.
Greasy or oily bores or shafts do not transmit the
torques defined in the catalogue.
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 (13/20) in 2 steps cross-wise
and then in 3 to max. 6 tightening sequences evenly using a
torque wrench to the torque stated in Table 3.
The clutch or clutch hub carries out an axial
movement in the direction of the cone bushing
when tightening the cone bushing.
Because of this effect, please ensure that on the
EAS
®
-NC clutch with steel bellows
(Type 453._ _ _.0), first one cone bushing is completely
tightened (e.g. Items 13/22), then the other (steel bellows) side
(Items 20/21, Fig. 5).
Please also ensure during installation of Type 453._ _ _.0 that
no axial pressure is placed on the steel bellows (can cause
damage).
De-installation
There are tapped extracting holes next to the tensioning screws
(13/20) in the cone bushings.
1) Loosen all tensioning screws by several thread turns.
2) Screw out the tensioning screws 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.
Fig. 5
Shaft Installation via Key Connection
On the EAS
®
-NC with a keyway, the clutch must be axially fixed
onto the shaft after mounting, e.g. with a press cover and a
screw (Fig. 6), screwed into the shaft central thread.
Fig. 6
Cup Spring Layering (Fig. 7)
Correct cup spring layering is a prerequisite for problem-free
clutch function and torque adjustment.
For the lower torque range,
one
cup spring
(Type 45_.
5
_ _._),
for the medium torque range,
two
cup springs
(Type 45_.
6
_ _._),
and for the high torque range
three
cup springs (Type 45_.
7
_ _._) are installed.
1x layered
2x layered
3x layered
Type 45_.
5
_ _._
Type 45_.
6
_ _._
Type 45_.
7
_ _._
Fig. 7
Joining (Screwing) Both Clutch Hubs (1/17)
EAS
®
-NC Type 453._ _ _.0 (Fig. 1)
When mounting the hubs (1 and 17), the
joining force must not be transferred via the
steel bellows
=> danger of bellows deformation.
22
21
20
13
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