COMINTEC
37
C
max
= 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
C
nom
>
•
C
alt
•
f
F
•
f
T
•
f
R
1
M
α
X
K
0
20
40
60
80
100
0
25
50
75
100
80
60
40
20
0
C
nom
> C
mot
• f
T
• f
R
Dove:
C
nom
= theore
Ɵ
c nominal torque of the coupling
[Nm]
C
mot
= nominal torque motor side
[Nm]
C
max
= maximum torque of the coupling
[Nm]
C
SU
= sta
Ɵ
c torque user side
[Nm]
C
SM
= sta
Ɵ
c torque motor side [Nm]
f
A
= star
Ɵ
ng frequency factor
f
R
= rigidity factor
f
T
= thermic factor
J
mot
= iner
Ɵ
a motor side [Kgm
2
]
J
u
Ɵ
= iner
Ɵ
a user side [Kgm
2
]
K
= shock factor
Dove:
C
alt
= alternate system torque
[Nm]
C
nom
= theore
Ɵ
c nominal torque of the coupling
[Nm]
f
F
= resonance factor
f
R
= rigidity factor
f
T
= thermic factor
M
= coe
ffi
cient of material
Coe
ffi
cient of material (M)
0,25 = aluminium
0,35 = steel
Rigidity factor (f
R
)
2÷5
= posi
Ɵ
oning system
3÷8
= tool machines
>10
= turn indicator
Shock factor (K)
1
= light shock
1,4 = medium shock
1,8 = hard shock
Thermic factor (f
T
)
1
= -30 ÷ +30 °C
1,2 = +40 °C
1,4 = +60 °C
1,8 = +80 °C
Star
Ɵ
ng frequency factor (f
A
)
1
= 0 ÷ 100 star
Ɵ
ng each hour
1,2 = > 100 ÷ 200
"
"
1,4 = > 200 ÷ 400
"
"
1,6 = > 400 ÷ 800
"
"
1,8 = > 800 ÷ 1600
"
"
Completed and veri
fi
ed the choice of the coupling respect the torque to be transmi
Ʃ
ed, it is necessary to consider the
fl
exibility, comparing
the misalignment allowed by the type of coupling chosen with the real ones provided by the sha
Ō
s to be connected. If simultaneously present
at all types of misalignment, it is necessary that the sum as a percentage of the maximum value does not exceed 100%, according to the
graphic 1.
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:
GAS/SG & GAS - backlash free and standard jaw coupling: addi
Ɵ
onal informa
Ɵ
on
Axial misalignments
x [%]
Radial misalignments
K [%]
1. Allowed ra
Ɵ
o between misalignments [%]
Resonance factor (f
F
)
1
= frequency < 10
f/10
= frequency > 10
Recircula
Ɵ
ng ball screw
Servomotor
GAS/SG
Servomotor
GAS/SG
+ torque limiter
DSS/SG
(safety coupling)
APPLICATION EXAMPLE
DIMENSIONING