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A part’s listing in this catalog does not guarantee its availability.
To download/print the most current catalog, go to www.lordfulfi llment.com/upload/PC7000.pdf. Rev.1 10/08
Dynafl ex LCD Series Couplings
Installation Guide
Specifi cations
Materials: The elastomer used in the Dynafl ex LCD
Series Coupling is a high-quality natural rubber which
meets LORD specifi cations (available upon request) and
exceeds SAE standards. Natural rubber is used because
of its excellent physical properties, such as tensile
strength, tear and abrasion resistance, fatigue resistance
and low temperature characteristics. The elastomer-to-
metal bonds are even stronger than the elastomers.
Standard LCD catalog parts are all made in two stiff-
nesses of natural rubber. The A elastomer is per LORD
Spec MAP092, having a durometer of approximately
45. The C elastomer is LORD Spec MAP094, having a
durometer of approximately 57. The metal parts for this
series are of alloy steel or ductile iron.
Environmental: Extensive experience with similar
parts indicates that heavy-duty Dynafl ex couplings will
perform satisfactorily when exposed to the normal fl uid,
temperature and other environmental conditions found in
driveline systems. For operation in ambient temperatures
exceeding 170°F (77°C), consult LORD Corporation.
Dynafl ex LCD Series Couplings are often recommended
for use in applications where the temperature is above
170°F (77°C). Temperatures above 200°F (93°C) could
present problems. Customers should know what the
ambient operating temperature is and whether addi-
tional air circulation can be provided. Consultation with
LORD Corporation engineers is necessary if the ambient
temperature is above 170°F (77°C).
Misalignment: Misalignment capability applies to
speeds up to 2500 rpm. Operation up to 3500 rpm
is permitted with reduced misalignment. (Consult
LORD when a potential application requires special
consideration).
At normal rated operating conditions, the Dynafl ex
LCD Series Couplings are designed to accommodate
misalignment.
Angular: 1-1/2° maximum
Parallel: 1/64 inch
Axial: +1/16 inch dynamic
+1/8 inch static
Testing/Performance: Periodic load defl ection tests are
run to assure consistency of torsional spring rate and slip
torque characteristics.
Damping Coeffi cient, C
θ
: The natural rubber elastomer
used in LCD couplings offer hysteresis damping which
dissipates energy at resonance.
The “damping coeffi cient” is a function of many vari-
ables. Among them are dynamic strain, frequency,
elastomer type and stiffness, temperature and torque
loading. Damping coeffi cients for this series have been
determined and can be provided for torsional analysis
work by contacting LORD.
Page 116 of 124
DYNAFLEX ELASTOMERIC FLEXIBLE COUPLINGS