®
TRASCO ES
TRASCO® ES: “0” Backlash Coupling
Contents
TRASCO® ES “0” Backlash Coupling
Page
Description
43
Advantages
44
ATEX 94/9/EC compliance
44
Technical characteristics - Misalignments
45
Installation and maintenance
46
Selection according to DIN740.2
47
Example for selection and load check
48
TRASCO® ES execution
49
• Standard type execution
50
• “M” execution with clamp hubs
51 - 52
• “A” type - shrink disc execution
53
• “AP” type - shrink disc execution according to DIN 69002
54
• “GESS” double cardanic execution
55
• “GES LR1” execution with intermediate shaft
56
• “GES LR3” execution with intermediate shaft
57
- Technical data for intermediate shaft couplings “GES LR1 - GES LR3”
58
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TRASCO® ES: “0” backlash coupling
TRASCO ® ES is our zero backlash coupling designed to
compensate for misalignment and vibration dampening for
indexing applications. The compact design of TRASCO® ES
makes it the right choice for all precise motion applications.
Description
The element is available in 4 different hardnesses: 80 Sh. A
(blue), 92 Sh. A (yellow), 98 Sh. A (red), 64 Sh. D (green).
Coupling performance depends on the type of element selected
(see “Technical characteristics” ).
Other element hardnesses are available upon request to
meet special operating conditions, such as high temperatures
and/or high torques, and for providing a high degree of vibration
dampening capability. Please contact our Engineering Office for
help in selecting the appropriate element hardness.
TRASCO® ES
The TRASCO® ES consists of two hubs, which are either made
of high-strength aluminum (up to the 38/45 size) or steel (from
size 42) that are connected with an elastic element.
The precise dimensional characteristics of TRASCO® ES are
obtained through our accurate machining process.
The special compound polyurethane elastic element, developed through extensive research and laboratory testing, is
made through a press-forming process which guarantees high
dimensional accuracy.
Spider
Hub
Operation
When the polyurethane element is installed in its special seats
between the hubs, it becomes precompressed, thereby providing
the zero backlash feature which characterizes the transmission
performance of this coupling.
With zero backlash, the coupling remains torsionally rigid within
the range of the precompression load, but does permit the
absorption of radial, angular, and axial misalignments as well as
undesired vibrations.
The significantly wide precompressed area of the flexible element keeps the contact pressure against the elastic element low.
Therefore, the element teeth can be overloaded many times
without undergoing any wear or taking a permanent set.
Direct Drives
43
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Advantages
The TRASCO® ES coupling provides the following advantages:
•
•
•
•
•
•
“zero-backlash” motion transmission
dampening (up to 80%) of vibrations from motor shaft
low heat and electrical conductivity
easy and fast installation
perfect balance (A & AP type)
low moment of inertia (due to compact design and types of materials used).
Main applications
TRASCO® ES couplings are most frequently used with:
•
•
•
•
•
servomotors
robotics
sliding tables
spindle controls for drilling and grinding mandrels
ball-bearing screws
Operating Temperature Range
The operating temperature range for the TRASCO® ES depends on the type of element. For the 92 Sh. A (yellow), the range is
between -40 and +90°C, and for the 98 Sh.A (red), the range is between -30 and +90°C. Peak temperatures as high as 120°C
can be tolerated for brief instances.
High operating temperatures can cause the elastic element to lose a considerable amount of elasticity, thus substantially lowering the
torque handling capacity.
Therefore, when selecting a coupling, the operating temperature must be carefully considered (see “Technical characteristics”).
ATEX 94/9/EC compliance
It is possible to ask for specific certification for use in hazardous area according to EC standard 94/9/EC. TRASCO® ES
couplings are available with specific mounting/operating
instruction manual and conformity.
For information, please contact our technical office.
T [°C]
Torsion angle [rad]
44
Direct Drives
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Technical characteristics
Shore
TKN
[Nm]
TKmax
[Nm]
80 Sh.A (blue)
0,7
7
92 Sh.A (yellow)
1,2
98 Sh.A (red)
9
14
19/24
24/28
28/38
38/45
42
48
55
65
75
CT stat.
[Nm/rad]
CT din.
[Nm/rad]
Cr
[N/mm]
∆Ka
[mm]
∆Kr
[mm]
∆Kw
[°]
1,4
8
26
114
0,6
0,15
1,0
2,4
14
43
219
0,6
0,10
1,0
2,0
4
2
69
421
0,6
0,10
1,0
80 Sh.A (blue)
1,8
3,6
16
52
125
0,8
0,20
1,0
92 Sh.A (yellow)
3,0
6
29
95
262
0,8
0,15
1,0
98 Sh.A (red)
5,0
10
55
155
518
0,8
0,10
1,0
92 Sh.A (yellow)
7,5
15
114,6
344
336
1,0
0,15
1,0
98 Sh.A (red)
12,5
25
171,9
513
604
1,0
0,09
0,9
64 Sh.D (green)
16
32
234,2
702
856
1,0
0,06
0,8
80 Sh.A (blue)
5
10
370
1120
740
1,2
0,15
1,1
92 Sh.A (yellow)
10
20
820
1920
1260
1,2
0,10
1,0
98 Sh.A (red)
17
34
990
2350
2210
1,2
0,06
0,9
64 Sh.D (green)
21
42
1470
4470
2970
1,2
0,04
0,8
80 Sh.A (blue)
17
34
860
1390
840
1,4
0,18
1,1
92 Sh.A (yellow)
35
70
2300
5130
1900
1,4
0,14
1,0
98 Sh.A (red)
60
120
3700
8130
2940
1,4
0,10
0,9
64 Sh.D (green)
75
150
4500
11500
4200
1,4
0,07
0,8
80 Sh.A (blue)
46
92
1370
2350
990
1,5
0,20
1,3
92 Sh.A (yellow)
95
190
3800
7270
2100
1,5
0,15
1,0
98 Sh.A (red)
160
320
4200
10800
3680
1,5
0,11
0,9
64 Sh.D (green)
200
400
7350
18400
4900
1,5
0,08
0,8
92 Sh.A (yellow)
190
380
5600
12000
2900
1,8
0,17
1,0
98 Sh.A (red)
325
650
8140
21850
5040
1,8
0,12
0,9
64 Sh.D (green)
405
810
9900
33500
6160
1,8
0,09
0,8
92 Sh.A (yellow)
265
530
9800
20500
4100
2,0
0,19
1,0
98 Sh.A (red)
450
900
15180
34200
5940
2,0
0,14
0,9
64 Sh.D (green)
560
1120
16500
71400
7590
2,0
0,10
0,8
92 Sh.A (yellow)
310
620
12000
22800
4500
2,1
0,23
1,0
98 Sh.A (red)
525
1050
16600
49400
6820
2,1
0,16
0,9
64 Sh.D (green)
655
1310
31350
102800
9000
2,1
0,11
0,8
92 Sh.A (yellow)
410
820
13000
23100
3200
2,2
0,24
1,0
98 Sh.A (red)
685
1370
24000
63400
7100
2,2
0,17
0,9
64 Sh.D (green)
825
1650
42160
111700
9910
2,2
0,12
0,8
92 Sh.A (yellow)
900
1800
38500
97200
6410
2,6
0,25
1,0
98 Sh.A (red)
1040
2080
39800
99500
6620
2,6
0,18
0,9
98 Sh.A (red)
1920
3840
79150
150450
8650
3,0
0,21
0,9
TRASCO  ES
Size
TRASCO® ES
Even after operating for an extended period with a misalignment,
there is still zero backlash because the elastic element is only
stressed by pressure loads.
When an application causes a high degree of misalignment, a
double flexing type coupling can be provided which avoids the
formation of reaction forces.
Please contact our Engineering Office.
The following technical characteristics apply to all types of
TRASCO® ES couplings.
When using the M, A and AP versions, check the torque values
given in the table against the allowable hub transmission values
for the respective versions given in the pertinent sections.
TRASCO® ES couplings can withstand axial, radial, and angular
misalignment.
All the technical data in the catalogue are valid for rotation speeds of 1500 rpm and a working temperature of 30 °C.
For linear speed over 30 m/s, dynamic balancing is recommended.
Misalignments
Δ Kw
Δ Kr
Δ Ka
Axial
A ssia le
Angular
Disa ssa m e n t o a n g o la re
Radial
TKN
Coupling nominal torque
Nm
TKmax
Coupling maximum torque
Nm
CT
Torsional rigidity
Nm/rad
Cr
Radial stiffness
N/mm
∆Ka
Maximum axial misalignment
mm
∆Kr
Maximum radial misalignment
mm
∆Kw
Maximum angular misalignment
°
Disa ssa m e n t o ra d ia le
Direct Drives
45
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Installation and maintenance
1. Carefully clean the shafts
2. Insert the hubs onto shafts being connected. With the M, A
and AP versions, be sure to tighten the screws with the Ms torque value given in the catalogue. Be careful with the A and AP
versions to tighten the screws uniformally and crosswise to the
recommended torque
3. Position the element in one of the two coupling hubs
4. Fit together the two coupling halves, making sure the “s”
dimension is properly observed. This must be done to insure
proper elastic element function and long service life, as well
as to assure the coupling is properly insulated electrically
With the A and AP versions, mounting the hubs can be facilitated
by lubricating the shaft contact surfaces with an oil, but do not
use a molybdenum bisulphide based oils.
When mounting the TRASCO® ES coupling an axial thrust is
generated which disappears when the mounting has been com-
pleted to avoid putting axial loads on the bearings.
Note: All rotating parts must be guarded.
46
Direct Drives
Lubrication of the elastic element will reduce the amount of
axial force required during installation
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Selection in according to DIN 740.2
The coupling must be chosen so the applied working loads do not exceed the allowable values whatever the working conditions are.
1. Check the load with respect to the nominal torque
The nominal coupling torque must be greater than or equal to the nominal torque of the drive machine for all working
temperatures.
TKN ≥ TTKKN⋅ S≥θT⋅KS⋅DS θ ⋅ SD
TKN ≥ TK ⋅ S θ ⋅ SD
TKN
≥ TK≥⋅TS θ⋅⋅SSD⋅ S + T ⋅ S ⋅ S
TSK max
S
Z
θ
K
θ
D
TK max ≥ TS ⋅ S Z ⋅ S θ + TK ⋅ ST
θ K⋅ max
D ≥ TS ⋅ S Z ⋅ S θ + TK ⋅ S θ ⋅ SD
m
1
m
1
m
1
(1)
(1)
(
1
(1)
)
(1) T
(1)
≥ TSS⋅=⋅ STZT
⋅S
+T
SAθ +⋅ S
≥ T⋅ S ⋅ S Z ⋅⋅ S
SSmax
Motor-side peaks: TTSK max
Driven-side
⋅⋅ S
⋅ ⋅S
= TLS ⋅⋅ SL + T⋅ S
+ TL
θT
K
TS = TT
= TAS
TKL ⋅ S θ ⋅TKT
⋅TT
⋅TSDL +peaks:
TL
D= TT
SθA ++ T
AS
LSS ⋅
L L
≥ TS ⋅ S
++
SZ ⋅=
LS
K max AS
θA+
KL ⋅ S θ ⋅ SLD
m
1
m
+
1
m
+
1
m
+
1
m +1
m
+
1
TK max ≥ TS ⋅ S Z1 ⋅ S θ + TK ⋅ S(1θ) ⋅ SD
m
(1)
1
(1)
(1)
(1) m
(1)
= TAS
⋅ 1 T⋅ S⋅=ST
+ ⋅T
= TLS
⋅m ⋅ S⋅ S+L T
+T
L
A T
L
TS = TAS ⋅
⋅ SA + TL TST=S T
⋅ SL + TL TST=S T
S
LS ⋅
L
L
AS ⋅
A +LS
L
m
+
1
m
+
1
3. Check the load with respect to
torque
inversions
m1+periodic
1
m
+1
m +11
mm
+1
(1)m
(1)
(1)
(1)
1+
) T
= TAS
⋅max
T⋅ ⋅KS
⋅ m ⋅ SL + TL (1)
T+LS
⋅ S⋅DS
≥1TT⋅ S=⋅AθS
SLD TST = =TLS
≥TKT
S
TTKSmax= T
≥ASTS⋅ ⋅ S Z ⋅ S⋅ S
+
TKT⋅LS θ T
⋅T
S
ST
LT⋅θ (S
L θ+⋅T
A +
Z+
KDmax
S⋅ ⋅ S Z S⋅S⋅ S
θ ⋅K
θ
=
T
T
⋅
By means of resonance
+ 1 ⋅ SL + T(1L)
S
LS mm
S
AS m1+ 1
A
m +1
(m
1L) + 1
+ ⋅1SA + TL
+ ⋅1SL + TL
TS below
= TAS ⋅themoperational
TS = TLS ⋅ m
When the resonance frequency is passed rapidly
mwill
+ 1 be seen.
≥ Tm
+ T⋅KSinterval
⋅ S⋅θS⋅ SD a few torque peaks
T
≥ T ⋅ S ⋅ S + T ⋅ ST ⋅TSK max≥ T
⋅SS⋅+S1⋅ZS⋅ S+θ T
K max loads
S must
Z
θ
K
θ K max
D withSthe Zmaximum
θ
K torque
θ
D the coupling can support.
The generated alternating
be
compared
m
m
1 ⋅ S 1+ T ⋅(1S) m⋅ S (1)
1
(1)
(1)
(1)
≥ TSS⋅ =⋅ ST
SSmax
⋅LITLV⋅R⋅ S
+ T⋅LS
= TLI ⋅⋅ VR + T⋅ LV(1R) + TL
ZAI ⋅⋅T
θ =+
K
θ
D⋅ V + T
V
TS = TT
TTSK max
= TAI≥ ⋅TS ⋅ S Z⋅⋅VSRθ ++TTLK ⋅ S θT⋅TKT
TT
D= TT
≥ TS ⋅ S
⋅m
S
Rθ +
LI S⋅
S
R
L
K max AI
Z
K
θ
D
1 ⋅ Sm ⋅+S1
m +1 m +1
m +1
TK max ≥ TS m
⋅ S1+Z 1⋅ S θ ++ T
K (1) θ
(1)
mD
1
mm ⋅ V + T
1
(1)
(1)
(1)
(1)
V
T
T
=
T
⋅
⋅
+
T
=
T
⋅
Motor-side peaks: TS = TAI ⋅
L
⋅ VR + TL TS =S TAI ⋅AI m +⋅1VRTS+R =TDriven-side
⋅ Vpeaks:
TS =S TLI ⋅LI m +⋅1VR +R TL L
R + TL
LTLI ⋅
+1
m1+ 1
mm
+1
m +11
(1) mm
(1)
(1)
(1)
TT⋅ ≥LIS(θT
=D TT
⋅ V≥
TS = TLI ⋅ m ⋅ VR + TL (1)
TKN
⋅ VTRW+ ⋅TSL θ ⋅ STf 0S⋅T,S25
TRVST+KW
=
⋅1)⋅WS⋅f S⋅ S
⋅ ⋅VSR f +⋅ STDL
0KN⋅,25
T1KW
=T
0T,25
AI
S =T
AI ⋅= TKW ≥
KN =
θ D
W+ L
T
=
T
⋅
⋅
T
=
T
⋅
⋅
V
+
T
m
+
1
m
1
+
S
AI
R
L
S
LI
R
m
1
m +1
(1) m + 1
(1L)
TS = TAIinversions
⋅ m + ⋅1VR + TL
TS = TLI ⋅ m + ⋅1VR + TL
4. Check the load with respect to nonperiodic torque
m +1
0⋅,S
25
TKNm=+T1KW ≥ TW⋅ S⋅ S⋅θS⋅ S⋅ S
f ⋅ SD
0,25
TKN =toTKW
≥ TW ⋅ S θ ⋅torque
S,f25
0
T
Dinversions,
To check the load with
respect
nonperiodic
the
equations
must be satisfied:
KN = TKW ≥ T
W following
θ
f
D
T
≥
T
⋅
S
⋅
S
TKN ≥ T1
S
m
m
1 ≥KNT 1 ⋅ SK ⋅ Sθm⋅ SD
K ⋅ S θ ⋅T
,25
= =TKW
TAI
⋅W,S
TAIT
⋅⋅W≥VWT
θV
f
=TKN
T
TW = TTLIW⋅ = TLI ⋅⋅ Vfi ⋅ Vfi
T0W,25
=T
Vfi WD ⋅ S θ ⋅ S0T
⋅ θfi ⋅ S
⋅DV
KN⋅ = TKW ⋅≥
f0
D
W⋅ =
25
TTKN
T
⋅⋅ S
AI
fi=WTLI
KW
f ⋅ SDfi
+1
m
m
+
1
+
m
1
m
+
1
+
m
1
m +1
0,25 TKN
TKN=≥T1KW
T1K ⋅≥STθ W⋅ S⋅ DS θ ⋅ Sm
f ⋅ SD
1
mm ⋅ V
T
=
T
⋅
⋅
V
T
=
T
⋅
TW = TAI ⋅
⋅V
TfiW fi= TLI ⋅ ⋅ S ⋅ S⋅ Vfi+ T ⋅ S T⋅WSW= TLI ⋅LI m +⋅1Vfi fi
T W= TAI ⋅AI m +⋅T
V
TK max m
≥1
T+S1⋅ S Zfi ⋅ S θ + TKW⋅ S θ ⋅ S
K
θ
D
+1
mm
D m+
11 1K max ≥ TS m
m+Z 1 θ
1 ⋅TVWfi =Driven-side
TW = TAI ⋅
TW = TLI ⋅ m ⋅ Vfi
Motor-side peaks: TW = TAI ⋅
2
⋅ Vfi 2
⋅ Vpeaks:
2TLI ⋅
fi
T
=
T
⋅
⋅
V
T
=
T
⋅

+ 1 ⋅ Vfi
W
LI mm
W
AI m1+ 1  ψfi   ψm
m1++1 ψ 
≥1+T
+⋅S1V⋅ fiS1Z +
 θ + TK+ ⋅1S θ ⋅ SD
⋅ S
 
TW = TTAIK max
⋅ m
TW = TLI ⋅ m + ⋅1Vfi
2π  2 acceleration. m + 1  2π2 2 2π 1
m +1
(1) TL to be added if a torque
m
(1) (1)
(1)
V(1) = Vfi =
1
Vfi = peak occurs2during
ψ T= T
2 T
2⋅ 2 m⋅ 2 + T
ψ
T
=
TS = TLS ⋅
⋅ SL + TL

S
TS= TAS12⋅+ ψ ⋅ SA +2TL fi
⋅
⋅
S
+
T
2
2
S
AS
A
L
+
1
 nS  ψLSm
L
L



+
1
ψ
n





ψ
n



m +1
m
++π1  2 
1 − 12−π2+π 222 + +m1+ 1
1 −
 2
m
(1)
2π  2 2(π1) 
Vfi =  nR12+2 ψ  2π  VfiV=fi = T  = T1n+R22⋅2ψ21n
ψ


⋅
+
T
T
=
T
⋅
⋅
S

S
R

2
S
LS
L + TL
A2
L
2ψπ+1ψ
ψ
n1+
Calculation coefficients  n2  2π  ψ  2


 S1 −n2AS
m
m
+
1




  2
Vfi = 1 − 2  2 +   VfiV= = 1− 12+2 2+2+π
≥
 ≥nTS2 ⋅S Z ⋅ S
Tπ
⋅ S θ + TK ⋅ S θ ⋅ SD
n2RT
π2
TK max
+ T2K ⋅ Sfi θ ⋅ SD nn
2 
π
2
K
max
S ⋅S
π
2


2Z
θ2



2
ψ
n
R


R


Torsional
rigidity factor
Sθ = Temperature factor
+D = ψ
ψ2
1 − 2  +   Vfi = 1− 2n2 2S

 n 
 1 −nn≥R T2 ⋅ S+⋅2ψ
π +T ⋅ S ⋅ S
2π 

T
S
R


π
2
K1max
n2RSJA+ +ZJLJAθ +JJAKL −1 θ D−1
JA
30
J
− 30
30
JA + JL +80
T [°C] – 30 / +30
Positioning
and angular
 CTooling
nR−1= nR =C
min min
m = Am = Speed
=
nR+40
C+60
min
=
machines
Tdin
nRπ
Tdin
Tdin
J2mπ
 ⋅1
m indicator (1)
acceleration
(1)
m
1A ⋅ JL
system
J
J
J
(1)
(
1
)
π
⋅
J
J
π
J
L T =L T ⋅
T A= TTL ⋅=A TLIL ⋅ ⋅ VR +⋅TVLR + TL
⋅ VR + TL
Sθ
1
1,2 TS = TAI1,4
⋅
⋅ V1,8
+ TL
LI
30
J+A 1+ JLR
JA1−1m−1+ 1
3030 C JASJ+A J+LJAISL m min
JAJA S
m
+1
+
−1=
m
n
m
=
R
Tdin
nR =
CTdin
m
=
=
nmin
C
min
m
=
10
≥
2-5 (1)
3-8
R
Tdin
m
(1)
AJ⋅JJ
π
π TπS = TAI ⋅JJAAJ1⋅+
⋅ LVR + TJJLLA−1
TS =JJLTAJLIL ⋅
⋅ VR + TL
Sν = Starting frequency factor
LL
JJAA +⋅ JJLL
30
−1 30
+
30
J
J
J
C
min
n
=
m
=
−
1
C
n
min
=
m
=
+
m
1
m
1
+
A
L
A
R
Tdin
R = T ⋅ S ⋅Tdin
TKKN
TKSJ⋅DJS=+
⋅JSD⋅ 1=,210
⋅=1,248
⋅ 4,0=[Nm]
48,0 [Nm] m =JJ
⋅ S=C
⋅4
==
min
nKN
TKN
,π0T
[Nm]
θ⋅ 10
θ ⋅Tdin
R48
30
πK θ SD J=A10
⋅ JL⋅ 1,2 ⋅ 4 T=
LLJ
LJ
A
L−1≥ T
0-100
101-200
S/h
JA J⋅T
TJKW
0,25 201-400
TKN = TKW ≥401-800
TW ⋅nSRθ =⋅ 801-1.600
S f ⋅ πSDCTdin 0A,SA25
L =min
L
KN
W ⋅ S θ ⋅ S f ⋅ SD m =
o SA = Shock factor
π T ⋅ S ⋅ SJA =L⋅ J10
JL
L ⋅ 1,2 ⋅ 4 = 48,0 [Nm]
T
=
θS =
D 10 ⋅ 1,2 ⋅ 4 = 48,0 [Nm]
SZ
TKN
⋅ SD = 10 ⋅ 1
,2 ⋅T4KN=KN=48
0⋅KS
[Nm]
1
1,2= TK ⋅ S θ1,4
1,6
TK,1,8
⋅
0,25θ TKND = TKW
≥ T of ⋅ impact
S θ ⋅ S f ⋅ SD
Type
S L o Sa
TKN
48,<0=TNm
<TW
T=
=T,48
0=Nm
TTKN ==48
,0⋅ SNm
< T=cal10 ⋅ 1,2 ⋅ T
KN=
cal ⋅ 1,2cal
⋅ ,S
10
⋅ 41= 48,0 [Nm]
T
⋅
S
4
48
KN
θ ⋅S
D
KN
K
θ
D1
m
TKN = K0TK[Nm]
⋅S
⋅
S
=
10
⋅
1
,
2
⋅
4
=m
48,0 [Nm]
θ
D
=TT
⋅Light
⋅ V,0fi [Nm]
TW = TLI ⋅
⋅ Vfi
S f = Frequency factor
1,5
TW = TAI ⋅
⋅ Vfi TKN = TK ⋅ S θ ⋅ SDT=
TLI=⋅ 48
⋅ Vfi
W 10
⋅W1AI,2=
⋅m
4
T
=
48
,
0
Nm
<
T
+1
m
+
1
m +1
TKN = 48,0 Nmm
< T+cal1
TKNKN= 48,0 Nm < Tcal cal
m
1 Medium
1,8
f in Hz
>10
≤10 JA
=Nm
⋅ Vfi
T =T ⋅
⋅V
JTAAI<⋅ T
JT
AW
TKN
m+=11,5 fi
KN
m
JA+mJ=2=J11,+5J2 JL = J3JL+ =J2J3 +WJ2m =LI 1,5
== =48
=
J
J,L0=,0
= Nm
J3 +<Jm
Jcal
m
= = 48,0 Nm <JATcal
= J1 + J2 Tm
m
1
TKN
48
T
A
1
2+
cal
J
Strong
2,2
J
JL
Sf
1
f/10
L
2
2 TKN = 48
JL ,0 Nm < Tcal
J
Jmm
=JA A J = J J+JJ=
= J+1 J+m
J21=+1,5ψJJ=L J= J+3 J+ J2
A J
m= A
mm
= 1=,51,5
J1A +=Jψ
+
=
L
3
2
L
3
2
1  2
A
1
2
JL
JJLAJL
2π  1
1
1
1
1
1

2
π
2
J


A =
== =
13,2 [Nm]
⋅ 1+,5
J⋅T
,2J=[Nm]
VAS
⋅S
1,SJ5⋅===T13
2
[Nm]
,0 ⋅mTS= = T
Tm
m = 1,5
J⋅+⋅AfiS
J ⋅22
+SJ,02=⋅ =22
1,,520 ⋅ ⋅J1L,J5===J13
JAS,V
JAA == J222
A
AS
fi ⋅
S = T
1 + J2 m
m = 1,5
JJA1A2++=11J1ψ+Am
+ 13J2 3 + 2J2
1,5+2=JJ1AL L m +31 m
Jn212,5+ 11,5
L
JL m + 1 n2 
ψ
ψ

J
m = 1,5
=1 L 1 1 JA = J1+21π
J−2 12 1 + JL = J3 + J2
1 − 2  +  mfactor
1
=
VTfi ==Torque-Amplification
=
V


=
⋅
⋅
=
⋅
⋅
=
T
T
S
22
,
0
1
,
5
13
,
2
[Nm]


fi ,5 = 13
2π13
,2A[Nm]
TAS ⋅  ⋅ nSRA =
⋅1
⋅S
=A 222,0 ⋅ n ,5 +2⋅11,5 =
 ,2 [Nm]
L ⋅AS
T2⋅Sπ=S TJAS
S
 22,0
1,51+ 1 mm
m1+ 1
+11+ 1 n2  1,5R1
+ 1
ψ1


−
1
+
1
1
T⋅K⋅S4⋅DS==θ 85
==T13
⋅13
1S,5,2==⋅ 113
,⋅,22
⋅22
⋅ 1,+612
⋅ 1,2 + 12,5 ⋅ 1,2 ⋅ 4 = 85,34 [Nm]
S
13
=T⋅K1T
,613
1,,2[Nm]
2
TT
TS⋅ ⋅ S Z ⋅ S⋅ θS+A T=K 22
SST
,⋅2
,=613
,5⋅θ,S
,θ⋅2
⋅ S,θ0⋅T
⋅ ⋅1S,,S
++=12
⋅0+1,0
⋅T
=S
,5
22⋅θAS
[Nm]
TAS
2T
AS
max
T
KDmax
S⋅⋅⋅1
Z
K max
S ==
,5 =[Nm]
[Nm],5 ⋅ 1,2 ⋅ 4 = 85,34 [Nm]
π+1 ⋅ ,1D34
nRAZ =K22
1⋅,251
1+ 1
1,5S +=1TAS m
m +1
 ⋅S
TS = TAS ⋅ m + ⋅1S A = 22,0 ⋅ 1,5 + ⋅11,5 = 13,2 [Nm]
= T,⋅2
+12
= 85
+ 12
= 85
TSK max= 13
TK,5⋅ S
13
21,⋅61[Nm]
,⋅61,⋅21,+212
4 85
,34
[Nm]
+S⋅1ZS⋅⋅1S
+
m
S ⋅⋅1
θ,1
D1
TK max = TS ⋅ S Z ⋅ S θ + TK ⋅ ST
2⋅,D5S
⋅ 4=
=
+θ +T
T
13
,2,,⋅34
,5 ,⋅51,⋅21,⋅24⋅ =
,34
[Nm]
θ K⋅ max
D
S S
Z,6
θ,2
K ⋅S
θ⋅ ⋅1S
30
JJA A+ JL
J
30
J
J
+
−1
−
1
A
L
m
=
Mass
factor
=
nR = Resonance frequency
=
n
min
m [Nm]
= A
TTK85
=,6⋅85
34
Nm
<C
T⋅,m
34
Nm
T12
TTK max n=R==85
< Tcal ⋅ S T⋅TS
min
=T ,34
R,,2
Tdin
max
cal⋅=
K
max
cal⋅,S
==13
⋅ ,S
+<+T
=
⋅
⋅
+
⋅
⋅
=
S
S
13
,
2
1
,
6
1
,
2
12
,
5
1
,
2
4
85
,
34
,
2
1
1
5
1
2
4
85
,
34
[Nm]
⋅ S ZNm
⋅CSTdin
=
⋅
⋅
⋅
=
K
max
S
Z
θ
K
θ
D
K max
Sπ
θ +T
K
θ
D
JL ,2 ⋅ 1,6 ⋅ 1,2 + 12,5 ⋅ 1,2 ⋅ 4 = 85,34 [Nm]
JL
JA ⋅ JL TK max = TS ⋅ S Z ⋅ S θ +πTK ⋅ S θ ⋅ SDJJA=L ⋅13
30⋅ S + T J⋅AS+ ⋅JS
JA ,34 [Nm]
⋅S
TKTmax =n=TS85
13,2−1⋅ 1,6 ⋅ 1,2 + 12,5 ⋅ 1,2 ⋅m
4 == 85
Z Nm
θ
K
θ L D =min
=
C
,
34
<
T
R ,34 Nm < Tdin
K max
TK max = 85,34 Nm < Tcal TK max
= 85
Tcal cal
π
JA ⋅ JL
JL Direct Drives
47
TK max = 85,34 Nm
<
T
TK maxT= 85
,
34
Nm
<
T
cal
cal
T
85,0,34
Nm
< Tcal
,2K ⋅max
4 ==48
[Nm]
KN =
K ⋅ S θ ⋅ SD = 10 ⋅ 1,2 ⋅ 4 = 48,0 [Nm]
KN = TK ⋅ S θ ⋅ SD = 10 ⋅ 1T
[
[
[
[ []
[[ ]]
[[ ]]
[ ]
]
]
]
[
]
[
]
[
]
]
TRASCO® ES
2. Check the load with respect to the torque peak
TKN
≥values
TK ⋅ S θ ⋅ SD
TKN ≥ TK ⋅ S θ ⋅ SD
TKN
≥T
K ⋅ S θ ⋅ SD
The maximum coupling
torque
must
be
greater
than
or
equal
the ⋅ torque
occur during operation for all working
S + TSpeaks
⋅DS θ ⋅ Sthat
⋅to
TTK max≥≥TTS⋅ S
⋅ S Z⋅ S⋅ S θ + TK ⋅ S θ T
⋅T
SKDmax
SS⋅θS+Z T
D
K ⋅θ S θ ⋅ K
≥ T≥TK⋅Tmax
SS θ⋅ S
⋅≥SZT
KN
D
KN
K
θ
D
temperatures.
TKN ≥ KTK ⋅ S
⋅
S
θ
D
KN
K
θ
D
TKN ≥ TK ⋅ S θ ⋅ SD
≥ ⋅TSS θ≥
⋅S
⋅K⋅SS
T
≥TT ⋅ S
+ ZT
⋅S
θZ+
S
⋅S
θ⋅ ⋅S
≥TSKTD⋅+S⋅TθSK⋅Z⋅⋅SS
⋅DSθ θ+
+TDTK⋅ S
⋅ S θ⋅ S
⋅ SD
TK max K≥max
TS ⋅ SKZSmax
⋅ STθKZmax
+ TK ⋅TS
⋅S
K
max
TST
θ max
D≥ TθS S⋅ S Z
K
θ
K
θ
D
www.sitspa.com
Example of selection
T
S
m (1)
1 1
m
1
(1)
(1)
(1)
(1)
1 (1) TS =(1)(T
1) m
TL⋅ +1T
T = TTLS=⋅⋅STL (1+)⋅ TT⋅Lm
SL +⋅ S
TL +mm
)⋅ T⋅LSA +
T = T T1 ⋅ = TSAS=⋅⋅S
T
⋅
TL ⋅ SL + T(L1)(1)
LS S⋅ ⋅ S
A (1+
S
T
=
T
⋅
+
T
S
LS
AS
A
L
S
= TSAS ⋅ AS S m⋅ TS
+
T
T
=
T
⋅
+
T
S==TTLS⋅L⋅
⋅ SL + TL
+A1 mL +T1SmS=+T1ASAS⋅ m + 1⋅ SS A A+ TLSL L
m +L1 mL +T1m
+
1
S
LS
m +1
m +1
m +1
mm++11
≥ ⋅TSS θ≥
⋅S
⋅K⋅SS
T
≥TT ⋅ S
+ ZT
⋅S
θZ+
S
⋅S
θ⋅ ⋅S
≥TSKTD⋅+S⋅TθSK⋅Z⋅⋅SS
⋅DSθ θ+
+TDTK⋅ S
⋅ S θ⋅ S
⋅ SD
TK max K≥max
TS ⋅ SKZSmax
⋅ STθKZmax
+ TK ⋅TS
⋅S
K
max
TST
θ max
D≥ TθS S⋅ S Z
K
θ
K
θ
D
Application
m m
1 (11)
m
1
(1)
(1)
(1)
(1)
(1)
m
TL +1T1 (1) ⋅ V + TT
TLI ⋅=⋅VT
(1+
) ⋅ T⋅L VR +⋅ V
T = T 1T⋅ = TTSAI =
⋅⋅VTRAI(1+)⋅ TT⋅L V
mm
R +⋅ V
L +
(1)S = TLIT⋅S = T
TL ⋅ VR + T(L1)(1)
R LI
TS==TTT
L ⋅V T
S+ T
TS = TSAI ⋅ AI Sm⋅ V
=
⋅
V
S==TTAI⋅R⋅
R+S T
LTLI ⋅
LI⋅R⋅
m
+
1
mL + T
1m
T
⋅ VR + TL
R1+ T
R
L
m
+
1
+
m
+
1
+
1
S
AI
R
L
S
LI
m
+
m
+
1
Servomotor driving a recirculating ball screw
m +1
m + 1 on a machine toolm + 1
m + 11
TK =0,25
10,0
Shock
Type
,25
TW
T 0Nm
= T0T
⋅0S≥,T25
S≥f ⋅⋅S
f θ⋅ S
,KN
25≥=TTT
TSθ=D⋅T
⋅SS
⋅≥SDTf W
⋅ S⋅DS θ ⋅ S f ⋅ SD
KW
WKW
θ ⋅S
KN
0T,25
T22,0
= KN
TNm
⋅=S
KN W
KW
,25
TDT
KW ≥ TW ⋅ S
θ0
f ⋅KW
Table
Moment
Inertia
AS = KN
KN = T
KW ≥ T
W ⋅ S θ ⋅ Sof
f ⋅S
D
Nominal Torque
Peak Torque
Rpm
Moment of Inertia
Temperature
Light
J3 = 0,0038 kg·m2
dc = 20 mm h6 (without keyway)
dm = 24 mm h6 (without keyway)
n = 3.000 1/min
Driven Shaft
J1 = 0,0058 kg·m2
Motor Shaft
m
1 1
m
1
T =TW+40°C
1 = TAI =
T ⋅ =TTLI ⋅=⋅VTfi ⋅ T⋅m
Vfi ⋅ V mm ⋅ V
= TT
⋅⋅VTfi AI ⋅ T⋅ V
TW = Tm
11 ⋅ T
fi= T
⋅
V
LI W
AIW⋅ ⋅T
⋅
V
W
W
fi
TW = T
⋅
V
=
T
⋅
⋅
V
⋅ V Wfi
⋅ V fi
LI
AI
m +fi1 m +T1 W= T AI⋅
m +fi1 mLI+T1 W==TTLI⋅fi⋅
m + 1 AI
m +1
Selection
W
mm++11
m +1
fi
W + 1 LI
m
mm++11
fi
2
2
2
2
2 ψ   ψ 
 1ψ+  1+  1 +  ψ  1 + ψψ 2


1
+


2π ( 98
24/28 “A” type ES coupling with “Red” elastic element
Sh.
 A ) 1+  
 2π
Vfi = Vfi =V2fiπ= 2  V 2 =  2π  2  22ππ 
Vfi = Standard
2 fi= 22 2
2
V
2
coupling
torque:

2

 n2fiψn  ψ  2Tψ2KN222= 60 [Nm]
 n12− n 1−ψ
n    ψψ 2
2− +  +
+torque:

n
1


2
T
=
120
[Nm]
1 −  Maximum


−
1
+


R 2πn 2 12−π  22πKmax
2  +  
 n 2 nR+  2n

22ππ 
 R   nn
R  = 0,000135
R 

Hub
Moment
ofπInertia:
[kg·m2]
RJ2 
Couple Transmitted by taper locking ring:
Tcal =
{
92 [Nm] bore 20 [mm]
113 [Nm] bore 24 [mm]
30 JA30+ JL JA +30
J
30
JA
−1
JJL −+1 Jmin
1L
L JJA++J−J
J−1A−=
m = mA = JA m =JJA A
1
n30= nR =CJnTdin
m
−min
1 A
A +=JLC TdinnC =30
Amin L
C
min
R
Tdin
nR = R
C
min
m
=
Tdin
JL J m = J
min
π Tdin π JAπ⋅ JnLR RJ=A ⋅ JπJL A C
JL
⋅ JTdin
L
L
π
JA ⋅ JL
JL
π
JJA A⋅ J⋅ LJL
JL L
[ [ ] ][ [ ] ] [[ ]]
Load check
⋅S
⋅ ⋅SS
==⋅10
⋅ 1,48
2
[Nm]
T = TT
⋅ S= ⋅TSD=
=Tθ10
⋅D1θ,2
4DT==
0⋅1S
[Nm]
,=
2D⋅48
4= ,10
=0 48
S⋅θ,⋅4
⋅ 1,02 ⋅[Nm]
4 = 48,0 [Nm]
TKN = KN
TK ⋅ S θK ⋅KNSDθT=KNK10
⋅ 1K,2T
⋅T
4KN=⋅ S
48
,K0⋅10
[Nm]
KN = TK ⋅ S θ ⋅ SD = 10 ⋅ 1,2 ⋅ 4 = 48,0 [Nm]
TKN
48<,=0T48
Nm < Tcal
T = 48
,0 =
Nm
<48
Tcal
cal ,0TNm
Nm<<TTcal
TKN = KN
48,0 Nm
<TTKN
TKNKN==48
,0,0Nm
cal
cal
m=
J
J
JA = A m = mA = JJAA = J1 J+A J=JA2 AJJ1 += JJ2 +
,5J= 1,5 m = 1,5
+ Jm
1,5m = 1m
m
23 +=J
= A JL =1 JJJL3JJ=2+A=JJ=32JJJ+L1+J+=J2 JJJ2m
L3 ==J1
,5 JLJ2L==J3J3++
JJAL = JJ1 +m
Jm
m = 1,5
J2 2
2=
JL
A
1
2
J
L
JL
JL L
1 1
1
1 1 1 1
0 ⋅⋅ 1,,50⋅ S
[Nm]
⋅ S,01⋅=⋅ S22
⋅=1,2522[Nm]
=⋅,1
T = T T1 ⋅ = TSAS=⋅⋅S
= 13
,5⋅ ,=211
13
,2⋅ 1[Nm]
⋅ T22
A ,=
013
13
[Nm]
⋅+,,=
AS
A
TS = TSAS ⋅ AS S m⋅ T
S+A1 =T
22
0
51122
,A⋅21
[Nm]
⋅S=+=AT1T
⋅
=113
AS
A=
m
1Sm
,
5
1
+T
+
S
22
,
0
,2,2[Nm]
⋅1
⋅
⋅
⋅ 1,5,5==13
1,5
,
5
1
+
AS
m +1
1,5 + 1 mm++11
1,15,5++11
= ⋅TSS θ=
⋅S
⋅K⋅SS
⋅ SS
⋅S
⋅ 11,85
⋅⋅,⋅4
TSKTD⋅+S
13T
1
1
,52,6⋅+
12
,4,+
52=12
=TT ⋅ S
+ ZT
⋅S
=⋅TθS13
⋅ 1,=2
+,612
T
,2 ⋅=1
,S
,2⋅13
,1
1⋅,1
2
34
[Nm]
θZ+
⋅,2
⋅2
⋅85
,2⋅85
,5[Nm]
,=2+
412,=34
θ⋅ ⋅S
+6
⋅⋅,S
=
⋅[Nm]
= 85,34 [Nm]
,26
11,2
,585
1,34
2 ⋅ 4[Nm]
θ S⋅ ,S
⋅ STθKZmax
+ TK ⋅TS
⋅S
=13
TK max K=max
TS ⋅ SKZSmax
2ZK⋅ 1Z⋅⋅,S
6⋅DSθ⋅θ1θ+
,θ5θ⋅,⋅2S
1
,⋅34
K
max
K⋅ S
D⋅ 4
TST
TD+K 12
θ max
D==T13
K
S
D = 13,2 ⋅ 1,6 ⋅ 1,2 + 12,5 ⋅ 1,2 ⋅ 4 = 85,34 [Nm]
85,=34
Nm
<Nm
Tcal< T Nm < T
T
=T85,34
Nm
< Tcal
TK=<max
,K34
cal
TK max K=max
85,34K max
Nm
Tcal 85
max = 85,34
cal
TT
K max = 85,34 Nm < Tcal
TKN
Coupling nominal torque
Nm
nR
Resonance speed
min-1
TK
Motor-side nominal torque
Nm
CT
Torsional rigidity
Nm/rad
TKmax
Coupling maximum torque
Nm
MT
Transmissible torque moment
Nm
TS
Motor peak torque
Nm
SA
Motor-side shock factor
TAS/TAI Driver-side peak torque
Nm
SL
Driven-side shock factor
TL
Nm
SZ
Start frequency factor
Nm
Sθ
Temperature factor
Acceleration delivered torque
TLS/TLI Driven-side peak torque
VR
48
Resonance factor
Vfi
Torque amplification factor
m
Mass factor
JA
Motor-side inertia
JL
Driven-side inertia
Ψ
Dampening factor
Direct Drives
(∆ Kw) (∆ Kw)
Torsional
rigidity
SD(∆ Kw)
Kw) factor
(∆ Kw)
(∆(∆Kw)
kgm2
kgm2
Sf
Frequency factor
TW
Torque with reversal of the machine
TKW
Torque with reversal transmissible by the coupling
Nm
TCal
Hub-shaft connection maximum torque
Nm
Nm
www.sitspa.com
TRASCO® ES executions
FINISHED BORE HUBS EXECUTION
GES F C execution
Hub execution with finish bore,
keyway and setscrew. Not suitable
for backlash free drives with high
reversing frequency or high startup frequency.
Hub execution with finish bore,
and setscrew.
CLAMP HUBS EXECUTION
GES M execution
GES M execution
Clamping hub execution with single slot without keyway. Up to size
19/24. Backlash free hub design.
Transmissible torque depends on
bore diameter.
GES M...C execution
Clamping hub execution with double slot without keyway. From size
24/28. Backlash free hub design.
Transmissible torque depends on
bore diameter.
GES M...C execution
Camping hub execution with single
slot and keyway. Up to size 19/24.
The clamping pressure eliminates
backlash in torque reversals.
Camping hub execution with double slot and keyway. From size
24/28. The camping pressure
eliminates backlash in torque
reversals.
GES 2M execution
Split camping hub execution for
radial assembly of the coupling
Torque depends on bore diameter.
Execution “C” with keyway, as option
can be delivered for a positive torque
transmission with zero backlash.
These executions are suitable for
double cardanic applications.
SHRINK DISC EXECUTION
GES A execution
GES AP execution
Execution with locking ring. This
execution is suitable for high
speed and high torque. Screws
mounting from spider side.
Transmissible torque depends on
bore diameter.
Execution with locking ring with
high machining accuracy: design
suitable for application on spindles
according to DIN 69002.
Direct Drives
49
TRASCO® ES
GES F execution
www.sitspa.com
Standard type
SIT coupling hubs are available from stock with either solid hub
or with finished bores of standard shaft diameters.
The setscrews of our finished bore execution are positioned 120
degrees from each other with one positioned 180 degrees from
the keyway. Both the solid hub and bored hub coupling are generally available from stock for quick delivery.
Approved according to EC standard ATEX 94/9/EC.
L
L
t
t
C
S
S
I
F
min
[mm]
W [kg]
S
M
Fig. 1
I
Fig. 2
Fig .4
Hub
F
max
[mm]
N
I
J [kgm2]
nmax
[min-1]
A
[mm]
G
[mm]
L
[mm]
I
[mm]
22
7
8
6
10
8
M
[mm]
N
[mm]
S
[mm]
P
[mm]
c
t
[mm]
Fig.
1,0
6
M3
3,5
1
1,0
2
M3
5
1
ALUMINUM HUBS
ALUMINUM HUBS
7
3
7
0,003
0,085 x 10-6
40.000
14
-
9
4
9
0,009
0,49 x 10
28.000
20
7,2
30
10
-6
14
4
15
0,020
2,8 x 10
19.000
30
10,5
35
11
13
10
1,5
2
M4
5
2
19/24
6
24
0,066
20,4 x 10-6
14.000
40
18
66
25
16
12
2,0
3,5
M5
10
2
24/28
8
28
0,132
50,8 x 10-6
10.600
55
27
78
30
18
14
2,0
4
M5
10
2
28/38
10
38
0,253
200,3 x 10-6
8.500
65
30
90
35
20
15
2,5
5,2
M6
15
2
38/45
12
45
0,455
400,6 x 10-6
7.100
80
38
114
45
24
18
3,0
5,6
M8
15
2
-6
STEEL HUBS
60
t
C
126
50
26
20
105
51
140
56
28
21
60
160
65
30
22
4,0
68
185
75
35
26
4,5
80
210
85
40
30
5
6.000
2,520
3.786 x 10
5.600
9.986 x 10
5.000
120
18.352 x 10-6
4.600
135
160
25
70
65
25
80
5,900
75
30
ØG
ØF
ØA
55
95
46
2.246 x 10-6
°
4,100120
P
95
2,000
6,900
-6
-6
27.464 x 10-6
L
t
C
I
Order form
N
M
S
S
I
N
I
20
2
M8
25 0°
2
2
t
I
12
9
M10
20
8,3
M10
20
2
8,3
M10
25
2
N
M
S
I
Fig .3
Fig .4
GESF
24/28
F20
L
t
Size
t
C
F...: bore diameter
P
ØA
ØG
Spider
AES 24/28
R
TRASCO ES spider

Fig. 1S
N
I
M
B: 80 Sh A (blue)
G: 92 Sh A (yellow)
R: 98 Sh A (red)
V: 64 Sh D (green)
L
t
Fig. 2
S
I
2
Fig .5
210207/ 1/ C L
Direct Drives
P
M8
6C
I
GESP: solid hub
GESF: bore + keyway + set-screw
50
5,6
3,5
S
210207/ 1/ C L
S
M
Fig .3
Hub
Size
t
P
3.700
Bore tolerance: H7 - JS9 (DIN 6885/1) keyway
S
L
3,0
ØF
t
55
Øa
48
20
L
ØA
14
ØG
ØF
42
ØG
ØF
ØA
STEEL HUBS
ØA
M
Fig .3
Size
P
ØG
N
S
ØA
ØG
ØF
ØA
P
I
C
0°
12
ØG
ØF
t
C
t
W
Weight
kg
J
Moment of inertia
nmax
Maximum rpm
kgm2
min-1
www.sitspa.com
“M” execution with clamp hubs
This type of coupling permits quick, positive mounting, without
any shaft-hub backlash.
With the keyless coupling type, the torque applied for tightening
I
I
I
S
S N
I
I
I
f
Fig .7
Fig .7
Keyway
position
A
[mm]
G
[mm]
L
[mm]
0,085 x 10-6
40.000
-
14
-
22
7
8
6
1,0
6
4
15,0
1
0,007
0,42 x 10-6
28.000
-
20
7,2
30
10
10
8
1,0
2
5
23,4
1
10,5
9
M2,5
0,75
14
6
15
M3
1,4
0,018
2,6 x 10
19.000
180°
19/24
10
20
M6
11
0,071
18,1 x 10-6
14.000
120°
40
18
24/28
10
28
M6
11
0,156
74,9 x 10-6
10.600
90°
55
28/38
14
35
M8
25
0,240
163,9 x 10-6
38/45
19
45
M8
25
0,440
42
25
50
M10
70
48
25
55
M12
55
35
70
65
40
80
2 L 5,5
11
13
10
1,5
32,2
1
66
25
16
12
2,0
3,5
12
t
45,7
1
27
78
30
18
14
2,0
4
12
56,4
2
30
90
35
13,5
72,6
2
80
38
114
45
16
83,3
2
N
I95
M
S46
126
50
26
20I
M
3,0
78,8
2
105
51
140
56
28
21
3,5
6
21
108,0
26
122,0
2
27,5 139,0
2
90° P 65
90°
ØG
E
P
ØF
ØA
ØF
ØA
8.500
L
35
t
ØG
E
L
30Lt
-6
P
t
20
15
2,5
P
5,2
24
18
3,0
5,6
-6
465,5 x 10
7.100
2,100
3.095 x 10-6
6.000I
M-
120
2,900
-6
5.160 x 10
5.600
-
M12
120
4,000
9.737 x 10-6
5.000
-
120
60
160
65
30 f
22
4,0
9
M14
190
5,800
17.974 x 10-6
4.600
-
Fi135
g .6
68
185
75
35
26
4,5
8,3
N
S
S
I
STEEL HUBSS
I
E
S
E
STEEL HUBS
f
N
S
I
Fig .6
S
I
5,6
N
M
S
20
I
Fig .7
2
ØA
ØF
4
E
9
ALUMINUM HUBS
ØG
0,003
Fig.
E
0,35
ALUMINUM HUBS
E
M2
ØG
7
I
M
N
S
P
t
E
[mm] [mm] [mm] [mm] [mm] [mm] [mm]
E
3
J [kgm ]
ØA
ØF
7
W [kg]
2
ØA
ØF
f
f
Fig .7
From size 7 to 19/24: single slot execution
From size 24/28 to 65: double slot execution
Bore tolerance: F7 - JS9 (DIN 6885/1) keyway
210207/ 2/ C L
Hub
GESM 48
210207/ 2/ C L
F50
GESM: TRASCO ES hub
Size
F...: bore diameter
F...C: bore diameter and keyway
Spider
AES 24/28
R
Fig. 1
TRASCO ES spider
Fig. 2
210207/ 2/ C L
210207/ 2/ C L
Size
B: 80 Sh A (blue)
G: 92 Sh A (yellow)
R: 98 Sh A (red)
V: 64 Sh D (green)
I
Fig .8
nmax
[min-1]
F
max
[mm]
MS
Screw tightening torque
Nm
W
Weight
kg
J
Coupling moment of inertia
nmax
Maximum rpm
kgm2
min-1
Direct Drives
P
S
S
M
f
f
ØG
ØA
ØF
ØG
E
N
M
Fig. 2
Hub
F
min
[mm]
MS
[Nm]
I
Fig .6
Fig .6
Size
ØA
ØF
M
f
Fig. 1
S
S
TRASCO® ES
M
N
P
E
S
ØG
ØG
ØEA
ØF
ØG
E
I
S
t
P
E
M
I
N
E
I
S
S
E
N
P
L
t
t
P
ØF
ØA
ØF
ØA
S
L
L
t
t
ØE
A
ØF
L
L
P
down the screws (Ms) must be as given in the table.
The M coupling type is available with or without keyway.
Approved according to EC standard ATEX 94/9/EC.
51
f
www.sitspa.com
Using hub execution M without keyway, the maximum transmissible torque is the minor between the clamp-hub transmissible
torque and the value stated in the section “Technical
characteristics”.
Recommended M coupling Type Hub Bore Dia. [mm] and Transmissible Torque [Nm], valid for shaft tolerances k6
Size
∅4 ∅5 ∅6 ∅7 ∅8 ∅9
∅ 10 ∅ 11 ∅ 12 ∅ 14 ∅ 15 ∅ 16 ∅ 19 ∅ 20 ∅ 22 ∅ 24 ∅ 25 ∅ 28 ∅ 30 ∅ 32 ∅ 35 ∅ 38 ∅ 40 ∅ 42 ∅ 45 ∅ 48 ∅ 50 ∅ 55 ∅ 60 ∅ 65 ∅ 70 ∅ 75 ∅ 80
7
0,7 0,8
1
1,1
9
1,1 1,4
1,7
1,9
2,2
2,5
2,8
3
2,5
2,9
3,3
3,7
4,1
4,6
5
5,8
6,2
6,6
19/24
23
25
27
32
34
36
43
45
24/28
23
25
27
32
34
36
43
45
50
54
58
62
66
79
83
91
100 104 116 124 133 145
79
83
91
100 104 116 124 133 145 158 166 174 187
14
28/38
38/45
57
63
42
217 243 261 278 304 330 348 365 391 417 435
48
299 335 359 383 419 455 479 503 539 575 599 659
55
356 387 407 428 458 489 509 560 611 662 713
65
52
558 586 628 670 697 767 837 907 976 1046 1116
Direct Drives
www.sitspa.com
“A” type - Shrink disc execution
This type of coupling provides excellent kinetic uniformity.
Furthermore, the absence of keys or set screws makes it a
well-balanced coupling and greatly facilitates installation and
removal. An exact radial/axial positioning is easy for those
applications which require it. The absence of keyways also avoids
L
fretting corrosion and backlash between the shaft and the hub.
This is the ideal type of coupling for applications requiring precision and/or high rotational speeds.
Approved according to EC standard ATEX 94/9/EC.
L
ØF
ØA
f
f
ØF
ØA
ØF
ØG
ØF
ØG
P
P
S
N
I
f
f
S
M
I
Size
F
min
[mm]
F
max
[mm]
S
N
M
I
Screws
MS
per
locking [Nm]
elements
f
Hub
W [kg]
nmax
[min-1]
J [kgm2]
A
[mm]
G
[mm]
L
[mm]
I
[mm]
M
[mm]
N
[mm]
S
[mm]
P
[mm]
220207/ 1/ C L
ALUMINUM HUBS AND STEEL LOCKING ELEMENT
ALUMINUM HUBS AND STEEL LOCKING ELEMENT
14
6
14
M3
4
1,3
0,049
7 x 10-6
28.000
30
10,5
50
18,5
13
10
1,5
2
19/24
10
20
M4
6
2,9
0,120
30 x 10-6
21.000
40
18
66
25
16
12
2,0
3,5
24/28
15
28
M5
4
6,0
0,280
135 x 10-6
15.500
55
27
78
30
18
14
2,0
4
28/38
19
38
M5
8
6,0
0,450
315 x 10-6
13.200
65
30
90
35
20
15
2,5
5,2
38/45
20
45
M6
8
10,0
0,950
960 x 10-6
10.500
80
38
114
45
24
18
3,0
5,6
STEEL HUBS AND LOCKING ELEMENT
STEEL HUBS AND LOCKING ELEMENT
220207/ 1/ C L
42
28
50
M8
4
35,0
2,300
3.150 x 10-6
9.000
95
46
126
50
26
20
3,0
5,6
48
35
60
M8
4
35,0
3,080
5.200 x 10-6
8.000
105
51
140
56
28
21
3,5
6
55
38
65
M10
4
71,0
4,670
-6
10.300 x 10
6.300
120
60
160
65
30
22
4
9
65
40
70
M12
4
120,0
6,700
-6
19.100 x 10
5.600
135
68
185
75
35
26
4,5
8,3
Bore tolerance: H7
Using hub execution A, the shrink-disc maximum transmissible
torque is the minor between the value stated in the table
below and the value stated in section “Technical characteristics”.
Recommended A coupling Type Hub Bore Dia. [mm] and Transmissible Torque [Nm], valid for shaft tolerances k6
Size
∅ 10
∅ 11
∅ 14
14
10
12
22
19/24
42
46
60
24/28
∅ 15
∅ 16
∅ 17
65
69
74
79
84
66
72
77
82
87
175
255
28/38
38/45
∅ 18 ∅ 19
∅ 20
∅ 22
∅ 24
∅ 25
∅ 28
∅ 30
∅ 32
∅ 35
∅ 38
92
102
113
118
135
185
205
225
235
283
312
326
∅ 40
∅ 42
∅ 45
266
287
308
339
373
367
398
427
471
420
460
500
563
557
∅ 48
∅ 50
515
545
577
620
627
670
714
612
649
687
986
1112
1531
∅ 55
∅ 60
790
850
880
744
801
1140
1185
1284
1580
1772
1840
1960
∅ 65
∅ 70
840
932
1033
1412
1420
2049
1652
1680
1691
2438
2495
2590
88
42
48
55
65
Spider
Order form
AES 24/28
R
TRASCO ES spider

Hub
GESA 48
Size
F45
B: blue; G: yellow; R: red; V: green
GESA: TRASCO® ES hub - “A” execution
Size
F...: bore diameter
MS
Screw tightening torque
Nm
W
Weight
kg
J
Coupling moment of inertia
nmax
Maximum rpm
kgm2
min-1
Direct Drives
53
TRASCO® ES
S
I
www.sitspa.com
“AP” type - Shrink disc execution according to DIN 69002
Precision “zero-backlash” coupling designed for multi spindle
devices on machine tools or controls with reduced mass, such as
short center spindles, multi-centers primary spindles in work sta-
tions, or joined to high speed bearings with limited tolerance
range. It is suitable for very high speeds of rotation (up to speeds
of 50 m/s).
L
L
Ø F3
Ø F1
Ø F H6
Ø F2
Ø FH6
ØA
P
Ø F1
Ø F3
Ø F H6
Ø F2
Ø FH6
ØA
P
I2
S
N
I
S
M
I
Fig .10
I2
S
I
N
S
M
I
Fig .10
220207/ 2/ C L
Hub
FH6
MS
[mm] [Nm]
Size
W [kg]
nmax
J [kgm2]
[min-1]
A
[mm]
L
[mm]
I
[mm]
STEEL HUBS AND LOCKING ELEMENT
I2
[mm]
M
[mm]
N
[mm]
S
[mm]
P
[mm]
F1
[mm]
F2
[mm]
F3
[mm]
STEEL HUBS AND LOCKING ELEMENT
14
14
1,89
0,080
11 x 10-6
28.000
32
50
18,5
15,5
13
10
1,5
2,0
17
17
8,5
19/24 - 37,5
16
3,05
0,160
37 x 10-6
21.000
37,5
66
25
21
16
12
2,0
3,5
20
19
9,5
19/24
19
3,05
0,190
46 x 10
21.000
40
66
25
21
16
12
2,0
3,5
23
22
9,5
24/28-50
24
4,90
0,330
136 x 10-6
220207/ 2/ C L50
15.500
78
30
25
18
14
2,0
4,0
30
29
12,5
24/28
25
8,50
0,440
201 x 10-6
15.500
55
78
30
25
18
14
2,0
4,0
32
30
12,5
28/38
35
8,50
0,640
438 x 10-6
13.200
65
90
35
30
20
15
2,5
5,2
42
40
14,5
38/45
40
14,00
1,320
1.325 x 10-6
10.500
80
114
45
40
24
18
3,0
5,6
49
46
16,5
42
42
35,00
2,230
-6
3.003 x 10
9.000
92
126
50
45
26
20
3,0
5,6
54
55
18,5
48
45
35,00
3,090
-6
5.043 x 10
8.000
105
140
56
50
28
21
3,5
6,0
65
60
20,5
55
50
35,00
4,740
10.020 x 10-6
6.300
120
160
65
58
30
22
4,0
9,0
65
72
22,5
-6
Bore tolerance: H6
Spindle
98 Sh. A
TRASCO® ES
64 sh. D
“AP”
TKN
[Nm]
TKmax
[Nm]
TKN
[Nm]
TKmax
[Nm]
25 x 20
14
12,5
25
16
32
32 x 25
19/24 - 37,5
14
28
17
34
32 x 30
19/24
17
34
21
42
40 x 35
24/28 - 50
43
86
54
108
50 x 45
24/28
60
120
75
150
63 x 55
28/38
160
320
200
400
size
Spider
Order form
AESP 24/28
R
TRASCO ES spider - “AP” execution
Hub
GESAP 48
Size
F45
R: red; V: green
GESAP: TRASCO® ES hub - “AP” execution
Size
F...: bore diameter
54
Direct Drives
MS
Screw tightening torque
Nm
W
Weight
kg
J
Coupling moment of inertia
nmax
Maximum rpm
kgm2
min-1
www.sitspa.com
“GESS” double cardanic execution
This execution allows higher misalignments. The 2 spiders allow
a high vibration dampening providing a decrease in drive noise
and longer life of related components (ex. bearings).
The intermediate element is made of aluminum alloy and may be
used in combination with any type of hub execution.
V
H
N
M
N
S
M
C
H
Fig.1
Ø Fa
ØG
S
S
S
V
H
N
S
M
C
H
Fig .2
Fig.2
Fig .1
TRASCO® ES
M
S
Ø Fa
Ø Fa
ØE
ØG
ØE
Ø Fa
S
N
S
ØA
L
L
GESM...
7
3
4
14
9
20
–
V
[mm]
ALUMINUM HUBS
AES...
20
–
7
25
S
[mm]
4
GESM...
10
45
5
–
0,003
10
1
8
–
0,007
11
56
8
13
1,5
10
–
16
2
12
L
18
0,05
0,000013
1
14
27
0,14
15
30
0,22
18
38
3
20
21
30
3,5
H
4
22
H
60
0,97
C 0,002
35
Fig .1
4,5
26
68
1,43
0,004
–
42
25
92
10
24/28
10
28
55
–
52
30
112
16
18
2
28/38
14
35
65
–
58
35
128
18
20
2,5
38/45
15
45
80
–
68
45
158
20
24
3
48
25
60
105
85
M 80
55
25
70
120
H 110
65
25
75
135
115
S 50N
V
56
M
88 C
65
102
75
S
N 22S
192
M
24 V
252
Fig .1
M
28
32
S
1
0,00006
1
0,00013
1
0,35
0,00035
1
46
S 0,51
N
S 0,0007
S
N
51
0,67
M
V 0,001
M
S
H
S2
N
2
M
AES...
GE
GESS...
AES...
GESS: spacer element
GESM...
GESM...
GESM...
Size: 24/28
W
Weight
J
Coupling moment of inertia
kg
kgm2
280207/ 3/ C L
M
GESM...
AES...
AES...
V
N
2 Fig .2
AES...
24
S
C
AES...
GESS...
S
H2
GESM...
GESM...
AES...
GESS
S 26
N
H280207/ 3/ C LC
H
218
28
GESS...
Spacer element
L
ALUMINUM GESS
S
174
GESM...
Order form
ØG
40
ØE
ØG
Ø Fa
20
ØE
10
Ø Fa
19/24
N 74 S
1
0,024
34
75 S
GESM...
0,00000008
1
–
95
Fig.
0,0000004
L
0,000003
30
STEEL HUBS
J
[kg m2]
AES...
6
15
45
GESS...
1
6
20
G AES... W
[mm]
[kg]
8
14
42
N
[mm]
ALUMINUM GESS
34
L
M
[mm]
Ø Fa
9
7
L
[mm]
ØA Ø G
GESS...
H
[mm]
Ø Fa
C
[mm]
ØE
ØG
Ø Fa
E
A
[mm]
AES... [mm]
ØE
Size
GESM...
Fa max
[mm]
Ø FFaa
Ø
Fa min
[mm]
280207/ 3/ C L
Direct Drives
55
www.sitspa.com
“GES LR1” execution with intermediate shaft
This zero backlash execution, allows connection to long distance
shafts in applications such as lifting screw jacks, gantry robot etc.
The intermediate shaft is made of steel but may be of different
material for specific need.
The presence of 2 spiders, increases the dampening properties
and allow high misalignments.
L
H
H
N
A
S
dr
d
S
E
L2
M
A
LR1
LZR1
External hub
Size
Internal hub
Dimensions
finished bores
L
S
M
dmax
[mm]
N
E
H
L
M
N
s
L2
L2 [mm] [mm] [mm] [mm] [mm] [mm]
[mm]
Ms
[N·m]
MT [N·m]
LR1
[mm]
LR1
min
[mm]
LZR1
[mm]
dR x tightening
[mm]
A
S
M3x12
1,34
6,1
30
11
35
13
10
1,5
46,5
65
LR1+22
14 x 2.0
19/24
6
24
M6x18
10
34
40
25
66
16
12
2,0
80
85
LR1+50
20 x 3.0
24/28
8
28
M6x20
10
45
55
30
78
18
14
2,0
94
96
LR1+60
25 x 2.5
28/38
10
38
M8x25
25
105
65
35
90
20
15
2,5
107,5
111
LR1+70
35 x 4.0
38/45
12
45
M8x30
25
123
80
45
114
24
18
3,0
135
126
LR1+90
40 x 4.0
A
LR1
Coupling configurator
Coupling code
Item
LZR1
Type
Execution
Bore diameter
GESP
-
-
GESF
-
F…
GESM
F-C
F…
Hub 1
GESF38/45F35
GESA
-
F…
Spider 1
AES
B-G-R-V
-
Spider 2
AES
B-G-R-V
-
GESP
-
-
GESL38/45
AES38/45V
Length LR1
LR1= 1200 mm
AES38/45V
GESF
-
F…
GESM
F-C
F…
GESA
-
F…
Hub 2
56
GESF38/45F35
MS
Screw tightening torque
Nm
MT
Transmissible torque moment
Nm
Direct Drives
Order example
On request
15
dr
4
E
14
d
dminH
[mm]
Screws
Din912-8.8
H
M·L
www.sitspa.com
“GES LR3” execution with intermediate shaft
Ideal execution for long distance shaft connections. Torque
transmission is zero backlash. It is used in applications such as
automatic machines, lifting machines, palletizing machines, and
handling machines. Designed for length up to 4 m without
t
H
L
M
A
Ø dR
ØE
Ø dm a x
I
Sez A -A
ØD
e
t
Lw
MS [Nm]
4762-8.8
19
8
20
M6
10 e
24
10
28
M6
28
14
38
M8
Hub 1
J1
ØD
Hub 2 Shaft
J2
J3
Sez A -A
Lw
E
H
I
L
M
Lw Lw min Lzw
D
t
e
dR
[mm] [mm] [mm] [mm] [mm] [mm] A [mm] [mm] [mm] [mm] [mm] [mm]
CT
[Nm/rad]
Lzw
t
H
M
25
A 40
0,02002
0,01304
0,340
3003
10
0,07625
0,04481
0,0697
6139
25
0,17629
0,1095
1,243
10936
65
0,2572
3,072
27114
80 e
55
30
L
17,5
22
3
49
16
59
18
35
25 Sez 67
A -A
20
45
33
83,5
24
26
ØD
18
45
M8
25
42
22
50
M10
49
1,12166
0,5523
4,719
41591
95
50
36,5
93
86
1,87044
1,1834
9,591
84384
105
56
39,5
103
22
55
M12
ØE
Ø dR
Ø dm a x
38
0,50385
48
Ø dR
I
Torsional
rigidity
2
t
H
98
1
113
Lw+35
47
8
14,5
40
Lw+44
57
10,5
20
50
131
Lw+50L z w73
11,5
25
60
Lw+66
84
15,5
30
Lw+73
94
18
32
80
36
100
M
A 163
180
I
202
28
3
2
Lw+79 105 18,5
L
1
70
Ø dR
dmin dmax
[mm] [mm]
Screws
DIN
L
A
Length on
request
Size
of inertia
Moment
3
2
[10 kgm ]
with dmax hub 1
Clamping
ØE
Ø dm a x
Dimensions
finished
bores
Lzw
M
ØE
Ø dm a x
A
H
Lw
I
A
Lw
A
Coupling configurator
Coupling code
“AP”
Type
Execution
Bore diameter
GESP
-
-
GESF
-
F…
GESM
F-C
F…
GESA
-
F…
AES
B-G-R-V
-
Hub 1
GESM38/45F35
Spider 1
GESLR38/45
Order example
AES38/45V
Distanza tra gli alberi Lw
Spider 2
Lw= 1200 mm
AES
B-G-R-V
-
GESP
-
-
AES38/45V
GESF
-
F…
GESM
F-C
F…
GESA
-
F…
Hub 2
GESM38/45F35
MS
Screw tightening torque
J
Coupling moment of inertia
Nm
kgm2
CT
Torsional rigidity
Nm/rad
190107/ 2/ C L
Direct Drives
57
TRASCO® ES
e
Lzw
Sez A -A
ØD
bearing support (depending on rotation speed). The double slot
execution, allows spider mounting and replacement without
driver/driven machine displacement. All aluminum alloy for a very
low inertia.
30
π
nR =
JA + JL
JA ⋅ JL
CTdin
[min ]
−1
m=
JA
JL
nR =
30
π
JA + JL
JA ⋅ JL
CTdin
[min ]
−1
m=
JA
JL
www.sitspa.com
m=
+ J2
T = TK ⋅ S θ ⋅ SD = 10 ⋅ 1,2 ⋅ 4 = 48,0 [Nm]
JA KN
JL
TKN = TK ⋅ S θ ⋅ SD = 10 ⋅ 1,2 ⋅ 4 = 48,0 [Nm]
Bores and torques for friction with hub without keyway [Nm]
Size
TKN =∅48
0 10
Nm∅<11Tcal∅ 14
8 ,∅
∅ 15 ∅ 16 ∅ 18 ∅ 19 ∅ 20 ∅ 22 ∅ 24 ∅ 25 ∅ 28 ∅ 30 ∅ 32 ∅ 35 ∅ 38 ∅ 40 ∅ 42 ∅ 45 ∅ 46 ∅ 48 ∅ 50 ∅ 55
TKN = 48,0 Nm < Tcal
19
17
21
23
30
32
34
24
JA
JL
21
23
30
32
34
m=
28
JA = J1 + J2
54
58
TS = TAS ⋅
48
40
42
38
40
42
JL = J3 + J2
62
38
42
38
47
51
m = 1,5
53
59
J
JL
70
74
78
86
93
97
109m =
117 A 124
136JA 148
= J1
+ J2
70
74
78
86
93
97
109
117
124
136
148
156
163
136
149
155
174
186
198
1 217
235
248
260
199
217
226
⋅ SA =
T =T ⋅
253 S 271 AS290
m +317
1 344
1
1
⋅ S A = 22,0 ⋅
⋅ 1,5 = 13,2 [Nm]
m +1
1,5 + 1
m = 1,5
22362
,0 ⋅
m = 1,5
JL = J3 + J2
1
175
279
285
297
310
⋅ 1,5 =416
13,2 434
[Nm]452
1,380
5 + 1 407
498
T
,5 ⋅ 1,2 ⋅ 4couplings
= T ⋅ S data
⋅ S + Tfor
⋅ S intermediate
⋅ S = 13,2 ⋅ 1,6 ⋅ 1,2 + 12
= 85,34 [Nm] (GES LR1 - GES LR3)
Technical
shaft
T
= T ⋅ S ⋅ S + T ⋅ S ⋅ S = 13,2 ⋅ 1,6 ⋅ 1,2 + 12,5 ⋅ 1,2 ⋅ 4 = 85,34 [
K max
S
Z
θ
K
D
θ
K max
S
Z
K
θ
θ
D
,2 [Nm]
TK max = 85,34Misalignment
Nm < Tcal
14
1,0
TK max = 85,34 Nm < Tcal
Angular
∆Kw
[°]
∆kr
1,2 + 12,5 ⋅ 1,2 ⋅ 4 =
85,34Assial
[Nm]
∆Ka
[mm]
0,9
19/24
1,2
0,9
24/28
1,4
0,9
28/38
1,5
0,9
38/45
1,8
0,9
1
CTot =
2⋅
1
+
CT anello
(∆ Kw)
1
2⋅
L intermediate shaft
1
+
CT spider CT intermediate shaft
L intermediate shaft =
[Nm / rad]
L intermediate shaft =
L zw − 2 ⋅ L
[ mm]
1000
L zw − 2 ⋅ L
[ mm]
1000
Selection diagram GES LR3 coupling
5
/4
38 8
LR 8/3
ES 2
G LR 2
ES 4/3
G
2
LR 24
ES 9/
G R1
L
ES
G
3000
2500
2000
rpm [min-1]
1500
1000
500
1000
1500
2000
Lw [mm]
Direct Drives
[Nm / rad]
CT allunga
∆Kr = (L z − 2 ⋅ H − M) ⋅ tan (∆ Kw)
with Lzw = total coupling length
58
L allunga
Radial misalignment
Angular misalignment = 0,9° per spider
CTot =
∆kw
Size
2500
3000
3500
4000
[mm]
L allunga =
L zw − 2 ⋅
1000