1

1

Flexible couplings with acetal grooves
• Absorption of significant angular and radial deviations
• Low inertia
• Do not produce variations in the speed of the transmission
• Reduction of torsional vibration
• Electric and thermal insulation between the shafts
• Mechanical protection against excessive pairs
POLY-FLEX are flexible couplings manufactured in acetal, of reduced sizes for applications where there is no need for a very high pair and where the misalignments in the shafts are significant .
The material is very resistant to fatigue, meaning that the coupling is suitable for actions at high speed. It absorbs torsional vibrations and insulates the shafts electrically and thermally, acting, if required, as a mechanical fuse.
These couplings are suitable in measuring systems and machines that do not have a great resistant pair. They are recommended for tachometers, potentiometers, encoders, etc.
POLY-FLEX couplings can be used in temperatures ranging from -30º to 85ºC.

ORDERING
CODE
D
Ød1 / Ød2
L
A
B
M:Fixing

mm
min
mm
max
mm
available
in stock
mm
mm
mm
mm
type
size
key
mm
par
tighten
N.cm
91.231.d1.d2
91.241.d1.d2
91.251.d1.d2
Ø15
Ø19
Ø24
Ø4
Ø4
Ø6
Ø6
Ø9
Ø14
4.4 6.6
6.6
6.6 10.10 12.12
20
20
25
5
5
6
10
10
13
DIN 916
DIN 916
DIN 916
M3x6
M3x6
M4x6
1,5
1,5
2,0
25
25
40
A is the maximum size of the shaft in the connector. B is the minimum distance of separation between the shafts.

SERIES
TYPE
SIZE
FIXING
Ød1
Input
diameter
Ød2
Outlet
diameter
91
2
1
1
111
-
111
2- POLY-FLEX
3- Ø15
4- Ø19
5- Ø24
1- Captive screws
See table above and Enco-Flex Range
for possible diameters