COMINTEC
16
100
75
50
25
0
0
25
50
75
100
9.
DBSE
5.
6.
0
50
100
150
200
250
300
350
400
450
500
6000
5500
5000
4500
4000
3500
3000
2500
2000
1500
1000
500
0
7. Rela
Ɵ
on between axial force [%]
and axial misalignment [%]
Axial misalignment
[%]
Axial thrust
[%]
GTR & GTR/DBSE - torsionally rigid coupling: addi
Ɵ
onal informa
Ɵ
on
ORDER EXAMPLE
Model
GTR/S
Simple torsionally rigid coupling
GTR/D
Double torsionally rigid coupling
GTR/DBSE
Torsionally rigid coupling with spacer
Locking type
See hub connec
Ɵ
on type list at page 4
Size
from 0 to 15
In case of DBSE model indicate the length or spacer
"DBSE" or total coupling length "L
tot
".
Example DBSE = 180mm / L
tot
= 264mm
TORSIONALLY RIGID COUPLING
Model
Size
Bore 1
Locking type
bore 1
Bore 2
Locking type
bore 2
DBSE / L
tot
GTR
GR.2
bore Ø25 H7
A1
bore Ø38 H7
A1
-
The rated outputs on the catalogue refer to normal use without shocks and with sha
Ō
s well-aligned with the environmental temperature
The value of axial thrust (+- 20%) is relevant to the axial movement (graphic 7).
The maximum speed of the coupling is in
fl
uenced by several factors:
• Peripheral speed of the coupling;
• Weight of the coupling;
• Length of the spacer (pages 12-14);
• Rigidity of the coupling;
• Quality of balance.
In general, for most applica
Ɵ
ons dynamic balancing is NOT required; in
other cases there is need to evaluate in reference to the graphic 8.
Diametro esterno
[mm]
Velocità
[Rpm]
Balancing not required
Balancing not required
Dynamic balancing required
Dynamic balancing required
B
a
l
a
n
c
i
n
g
d
e
p
e
n
d
b
y
a
p
p
l
i
ca
Ɵ
o
n
B
a
l
a
n
c
i
n
g
d
e
p
e
n
d
b
y
a
p
p
l
i
ca
Ɵ
o
n
8. Balance ra
Ɵ
o in rela
Ɵ
on to the size of the coupling
(GTR/S – GTR/D)
FITTING
1)
Achieve radial and axial alignment as precisely as possible to permit
the maximum absorp
Ɵ
on of possible misalignments and life of the
coupling (picture 5 and 6).
2)
Make sure that the sha
Ō
s are assembled so that its extremity is
square with the surface of the half-coupling (the length of the spacer
including two disc packs should be equal to the distance between
the two sha
Ō
s) (picture 9).
3)
Tightening the screws with a torque wrench in a cross sequence,
con
Ɵ
nuously un
Ɵ
l you obtain the
Ɵ
ghtening torque indicated in the
catalogue. It is recommended that only the nut/bolt not in
contact with the disk pack is rotated to prevent twis
Ɵ
ng of the
lamina
Ɵ
ons.
4)
Finally it is necessary to check and ensure the disc packs are
perfectly perpendicular to the sha
Ō
axis. It may be necessary to
release and
Ɵ
ghten some screws again.
In the coupling with spacer (GTR/D and GTR/DBSE), the central part of the
couplings (spacing bar) can be considered as a weight suspended between
two springs (lamellar pack). It will have a natural frequency which, if
excited, can produce some oscilla
Ɵ
ons of the spacer causing damage to
packs. It is recommended to increase the distance between the
fl
anges of
the hubs compared to the nominal dimen
Ɵ
ons “DBSE” (picture 9) by 1,5-2 mm to decrease the natural axial frequency.
In this way the lamellar packs are kept under tension and the possibility of spacer oscilla
Ɵ
on reduces.
Note:
about installa
Ɵ
on in ver
Ɵ
cal posi
Ɵ
on please see execu
Ɵ
on proposal at page 9.