Data Sheet

SIT Antriebselemente GmbH
Rieseler Feld 9
33034 Brakel / Westf.
Tel.: 05272 / 3928-0
Fax: 05272 / 3928-90
E-mail: [e-mail]
TRASCO
®
ES backlash coupling
The main design function of the TRASCO
®
ES coupling is to transmit motion while absorbing misalignments and
vibrations with absolute precision and without any backlash whatsever. The very compact design makes it a very
rational and functional divice.
Description
The TRASCO
®
ES coupling consists of two hubs which are either made of high-strength aluminium (up to size 38/45)
that are connected with an elastic element. The hubs are obtainedba an accurate machining in order to achieve extremely
precise dimensional characteristics. The elastic element which is made of special polyurethane that was developed
after considerable research and loboratary testing, is press-formed ba a process which guarantees a high degree of
dimensional accuracy.
The elastic elements are available i 4 different hardnesses:
80 Sh. A (blue), 92 Sh. A (yellow), 98 Sh. A (red), 64 Sh. D (green).
Coupling performances depends on the type of element selected (see "Technical Characteristics")
Standard type
The hubs of standard coupling type can be either solid or have a finished bore, the diameter of which corresponds to any
one of the standard shaft diameters. The grubscrew(s) is (are) located 180° from the key seat - ex. 02 (120° each other - ex. 01)
Both the solid hub and bored hub coupling are generally available from stock for quick delivery.
W [kg]
J [kgm
2
]
Aluminium Hubs
Aluminium Hubs
7
3
7
0,003
0,085 x10
-6
40.000
14
-
22
7
8
6
01
6
M3
3,5
1
9
4
9
0,009
0,49 x1 0
-6
28.000
20
7,2
30
10
10
8
01
2
M3
5
1
14
4
15
0,020
2,8 x10
-6
19.000
30
10,5
35
11
13
10
1,5
2
M4
5
2
19/24
6
24
0,066
20,4 x10
-6
14.000
40
18
66
25
16
12
02
3,5
M5
10
2
24/28
8
28
0,132
50,8 x10
-6
10.600
55
27
78
30
18
14
02
4
M5
10
2
28/38
10
38
0,253
200,3 x10
-6
8.500
65
30
90
35
20
15
2,5
5,2
M6
15
2
38/45
12
45
0,455
400,6 x10
-6
7.100
80
38
114
45
24
18
03
5,6
M8
15
2
Bore tolerance: H7 - JS9 (DIN 6985/1) keyway
W
Weight
kg
J
Moment of torque
kgm
2
n
max
max. rpm
min
-1
t
[mm]
Fig.
I
[mm]
M
[mm]
N
[mm]
S
[mm]
P
[mm]
c
F
max
[mm]
Hub
n
max
[min
-1
]
A
[mm]
G
[mm]
L
[mm]
Type
F
min
[mm]