COMINTEC
44
C
nom
= C
SM
•
J
u
Ɵ
J
mot
+ J
u
Ɵ
•
K
•
f
T
•
f
A
+ C
mot
•
f
T
•
f
R
C
nom
= C
SU
•
J
u
Ɵ
J
mot
+ J
u
Ɵ
•
K
•
f
T
•
f
A
+ C
mot
•
f
T
•
f
R
Considerando la coppia di spunto:
C
nom
> C
mot
• f
T
• f
R
Considerando la coppia di spunto:
GD - gear coupling: introduc
Ɵ
on
Hubs made in steel fully turned with standard treatment of phospha
Ɵ
ng.
Polyamide sleeve.
Sta
Ɵ
cally balanced.
Maintenance and lubrica
Ɵ
on free.
Compact and simple to be assembled.
Vibra
Ɵ
ons dampening.
ON REQUEST
Various hub connec
Ɵ
on type available.
Version with sleeve in steel, circlip and seals.
Version with sleeve directly integrated in one hub.
Speci
fi
c surface treatments possible.
DESCRIPTION OF THE SLEEVE
DIMENSIONING
FITTING
Star
Ɵ
ng frequency factor (f
A
)
1
= 0 ÷ 120 star
Ɵ
ng each hour
1,2 = 240 star
Ɵ
ng each hour
1,4 = 400 star
Ɵ
ng each hour
1,6 = 800 star
Ɵ
ng each hour
1,8 = 1600 star
Ɵ
ng each hour
thermic factor (f
T
)
1
= -40 ÷ +60 °C
1,2 = +70 °C
1,4 = +80 °C
1,6 = +90 °C
Shock factor (K)
1
= light shock
1,5 = medium shock
1,8 = hard shock
Where:
C
nom
= nominal torque of the coupling
[Nm]
C
mot
= nominal torque motor side
[Nm]
C
max
= maximum torque of the coupling
[Nm]
C
SU
= star
Ɵ
ng torque motor side
[Nm]
C
SM
= star
Ɵ
ng torque motor side [Nm]
f
A
= star
Ɵ
ng frequency factor
f
R
= thermic factor
f
T
= iner
Ɵ
a motor side
J
mot
= iner
Ɵ
a motor side [Kgm
2
]
J
u
Ɵ
= iner
Ɵ
a user side [Kgm
2
]
K
= shock factor
The GD coupling is composed of two hubs in steel UNI EN 10083/98 fully turned, externally toothed with rounded pro
fi
le and assembled only
with a sleeve in polyamide stabilized resin, toothed internally.
Due to the tooth pro
fi
le with which the hubs and the sleeve are connected, you can obtain a high contact surface also in presence of
misalignments, in order to reduce the contact pressures and promote
a longer life.
The connec
Ɵ
on polyamide/steel assures silent and reliable func
Ɵ
oning, in absence of maintenance and lubrica
Ɵ
on.
This kind of coupling represents a reliable and economic kind of connec
Ɵ
on, for medium and big power industrial purposes.
The standard sleeve is made in polyamide 6.6 stabilized resin and its proper
Ɵ
es are as follows:
•
Resistant to all common lubricants and hydraulic
fl
uids
•
Suitable to operate in a con
Ɵ
nuous way on temperatures from -25°C up to 90°C and for short periods up to 125°C
•
Op
Ɵ
mum sliding proper
Ɵ
es
•
High insula
Ɵ
ng capaci
Ɵ
es
•
Op
Ɵ
mum mechanical proper
Ɵ
es
For pre-selec
Ɵ
on of the coupling's size you can use the generic formula indicated on page 6.
Having established the coupling's size to be used, it is possible to make other checks considering further parameters:
It is important to consider that misalignments, axial, angular and parallel, must be considered paired together, as inversely propor
Ɵ
onal (one
reduces when the other increases). If all types of misalignments occur then it is necessary that the sum in percentage respect to the maximum
value doesn't exceed 100%.
Speci
fi
c procedures to assemble this coupling are not required.
1)
Achieve radial and axial alignment as precisely as possible to have the maximum absorp
Ɵ
on of possible misalignments and longer life of
the coupling.
2)
Having pre-assembled the coupling, insert the external half-hub on one sha
Ō
. Check that the external parts of the two sha
Ō
s don't exceed
the relevant half-hub's surface (quote “N”) and
fi
x this one to the sha
Ō
with its relevant
fi
xing system.
3)
Insert the sleeve on the two half-hubs being careful to respect the distance of the same half-hubs, quote “P” on the catalogue.
4)
Before star
Ɵ
ng transmission be sure that the sleeve can move freely.