SIEMENS
FLENDER Standard Couplings
Flexible Couplings — N-EUPEX and N-EUPEX DS Series
General information
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Siemens MD 10.1 · 2015
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Design
N-EUPEX and N-EUPEX DS couplings consist of two hub parts
mounted on the machine shafts. The coupling parts are con-
nected positively by means of elastomer flexibles. On the two-
part variant, the elastomer flexibles can be changed only if one
of the coupled machines is moved. On the three-part variants,
the bolted cam ring can be released and moved to enable the
flexible to be changed without moving the coupled machines.
Materials
Cam parts, pocket parts, adapters and hubs
Grey cast iron EN-GJL-250
Flexible materials
•
N-EUPEX series
•
N-EUPEX DS series
PU elastomer flexibles in special design on request.
The technical data and article numbers do not include the flexi-
ble variants NBR low-backlash, HNBR high temperature and
NR low temperature and the DS flexibles polyurethane electri-
cally insulating.
Technical data, prices and article numbers on request.
Brake disks
EN-GJS-400 spheroidal graphite cast iron or S355J2G3 steel
Brake drums
Grey cast iron EN-GJL-250
Low-temperature application
Shock loads in the drive caused by e.g. starting of drives with
large masses to be accelerated (e.g. in fan drives) result in high
component loads, particularly at low temperatures.
For such applications a particularly robust coupling series must
be selected. Of the flexible couplings, the RUPEX pin-and-bush
coupling is especially suited for this.
Types of N-EUPEX pin coupling
Further application-related coupling types are available.
Dimension sheets for and information on these are available on
request.
Types of N-EUPEX pin coupling on request
Material/description
Hardness
Identification
Ambient temperature
NBR standard type
80 ShoreA
Flexible black with blue stripe
-30 °C … +80 °C
NBR electrically insulating
80 ShoreA
Flexible green
-30 °C … +80 °C
NBR soft
65 ShoreA
Flexible black with green stripe
-30 °C … +80 °C
NBR hard
90 ShoreA
Flexible black with magenta stripe
-30 °C … +80 °C
NBR normal low-backlash
80 ShoreA
Flexible black with yellow stripe
-30 °C … +80 °C
NBR soft low-backlash
65 ShoreA
Flexible black with white stripe
-30 °C … +80 °C
NR for low temperature
80 ShoreA
Flexible black with orange stripe
-50 °C … +50 °C
HNBR high temperature
80 ShoreA
Flexible black with red stripe
-10 °C … +100 °C
Material/description
Hardness
Identification
Ambient temperature
NBR compound flexibles
for sizes 66 … 272
80/90 ShoreA
2 components
Flexible black
-30 °C … +80 °C
NBR hard
for sizes 305 ... 556
90 ShoreA
Flexible black
-30 °C … +80 °C
PU electrically insulating
95 ShoreA
Flexible blue
-30 °C … +50 °C
Type
Description
A
Fail-safe, 3-part
B
Fail-safe, 2-part
D
Fail-safe, 3-part, flange variant
E
Fail-safe, 2-part, flange variant
H
Fail-safe, with adapter
O
Fail-safe, 2-part, with brake drum
P
Fail-safe, 3-part, with brake drum
EBD
Fail-safe, 2-part, with brake disk
DBD
Fail-safe, 3-part, with brake disk
DBDR
Fail-safe, 3-part, with brake disk,
brake disk radially dismountable
ADS
Non-fail-safe, 3-part
BDS
Non-fail-safe, 2-part
HDS
Non-fail-safe, with adapter
Type
Description
AT
Fail-safe, 3-part, with Taper clamping bush
BT
Fail-safe, 2-part, with Taper clamping bush
G
Fail-safe, 2-part, with intermediate shaft
F
Fail-safe, 3-part, with intermediate shaft
K
Fail-safe, 3-part, with brake drum to customer's requirement
L
Fail-safe, 2-part, with brake drum to customer's requirement
M
Fail-safe, 2-part, with flange dimensions to
SAE J620d
© Siemens AG 2015