Installation and Operational Instructions for
EAS
®
-Compact
®
overload clutch Type 49_._ _4._
Sizes 01 to 3
(B.4.14.1.EN)
13/11/2017 GC/NU/GH/SU
Chr. Mayr GmbH + Co. KG
Eichenstraße 1, D-87665 Mauerstetten, Germany
Tel.: +49 8341 804-0, Fax: +49 8341 804-421
Page 13 of 19
Permitted Shaft Misalignments
The EAS
®
-Compact
®
clutches Types 494._ _ 4._ (lastic
backlash-free), 493._ _ 4.0 (with steel bellows) and 496._ _ 4.0
(torsionally rigid backlash-free / 2 disk packs) compensate for
radial, axial and angular shaft misalignments (Fig. 8) without
losing their backlash-free function.
The EAS
®
-Compact
®
clutches Type 496._ _ 4.8 (torsionally rigid
backlash-free / 1 disk pack) compensate only for axial and
angular shaft misalignments.
However, the Type-specific permitted shaft misalignments
indicated in Tables 6, 10 and 13 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. 9.
The sum total of the actual misalignments in percent of the
maximum value must not exceed 100 %.
The permitted misalignment values given in Tables 6, 10 and 13
refer to clutch operation at nominal torque, an ambient
temperature of +30 °C and an operating speed of 1500 rpm. If
the clutch is operated in other or more extreme operating
conditions, please observe the dimensioning guidelines stated in
the individual shaft coupling catalogues or contact the
manufacturer.
Type 493._ _ 4.0 (with steel bellows)
Radial
Axial
Angular
misalignment
displacement
misalignment
Type 494._ _ 4._ (lastic backlash-free)
Radial
Axial
Angular
misalignment
displacement
misalignment
Type 496._ _ 4._ (torsionally rigid backlash-free)
Radial
Axial
Angular
misalignment
displacement
misalignment
Fig. 8
Example (Size 3 / Type 493. _ _ 4.0):
Axial
displacement occurrence ΔK
a
= 0.4 mm equals 40 % of the
permitted maximum value ΔK
a
= 1.0 mm.
Radial misalignment occurrence ΔK
r
= 0.09 mm equals 30 % of
the permitted maximum value ΔK
r
= 0.3 mm.
=> permitted angular misalignment K
w
= 30 % of the maximum
value
ΔK
w
= 2.0° => ΔK
w
= 0.6°
Fig. 9
Clutch Alignment
Exact alignment of the clutch improves the running smoothness
of the drive line substantially, reduces the load on the shaft
bearings and increases the clutch service lifetime.
We recommend alignment of the clutch using a dial gauge or
special laser on drives operating at very high speeds.
L - Δ
0
K
a
L + Δ
0
K
a
Δ
K
r
Δ
K
w
Δ
K
r
ΔK
a
Δ
K
w
L
ΔK
a
Δ
K
w
2
x Δ
K
w
Δ
K
r
20
30
%
25
%
75
%
0%
50
%
20
40%
40
30%
60
60
80
80
100
100
Δ K
w
[%]
Angular misalignment
Δ K
a
[%] Axial displacement
Δ K
r
[%
]
Ra
d
ia
l m
is
a
lig
n
m
e
n
t
