Installation and Operational Instructions for EAS
®
-compact
®
Ratchetting clutch, Type 49_._ _0._
Sizes 01 to 3
Synchronous clutch, Type 49_._ _5._
Sizes 01 to 3
(B.4.14.EN)
17/03/2021 TK/NU/GC/GF/SU
Chr. Mayr GmbH + Co. KG
Eichenstraße 1, D-87665 Mauerstetten, Germany
Phone: +49 8341 804-0, Fax: +49 8341 804-421
Page 14 of 22
Permitted Shaft Misalignments
The EAS
®
-compact
®
clutches Types 494._ _ _._ (lastic backlash-
free), 493._ _ _.0 (with steel bellows) and 496._ _ _._ (torsionally
rigid backlash-free) compensate for radial, axial and angular
shaft misalignments (Fig. 7) without losing their backlash-free
function. However, the Type-specific permitted shaft
misalignments indicated in Tables 6, 10 and 15 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. 8.
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 15
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._ _ _.0 (with steel bellows)
Axial
Radial
Angular
displacement
misalignment
misalignment
Type 494._ _ _._ (lastic backlash-free)
Axial
Radial
Angular
displacement
misalignment
misalignment
Type 496._ _ _._ (torsionally rigid backlash-free)
Axial
Radial
Angular
displacement
misalignment
misalignment
Fig. 7
Example (Size 3 / Type 493. _ _ _.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. 8
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.
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
