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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
Page 104 of 124
DYNAFLEX ELASTOMERIC FLEXIBLE COUPLINGS
Typical Applications
Dynafl ex LCR Series Couplings are useful for a wide
range of rotary drive applications, from lawn and garden
tractors to large construction equipment, including U-joint
replacement. Typical applications include:
Typical End Product Application
Farm Tractor Trouble-Free Hydraulic Pump Devices
Lawn & Garden Tractors Maintenance-Free Main Drive Couplings
Dynamometer Protects Driveline from Failure
Snowmobile Reliable Main Drive Coupling
Vibratory Rollers Absorbs High Torsional Shock Loads in
Eccentric Drive Units
On- & Off-Highway Isolates and Protects Vehicles Auxiliary
Driveline Systems
Industrial Machinery Provides Inexpensive Coupling for
Maximum Angular Misalignment and
Vibration Control
Agriculture Equipment Replaces Conventional Universal Joints
and Provides Torsional Flexibility
Dynafl ex LCR Series Couplings were designed and
developed by LORD and have been in service since the
early 1960s. The basic concept was intended for specifi c
applications requiring low-cost, fl exible couplings to
accommodate all forms of misalignment and provide
torsional resilience.
The coupling design incorporates metal inserts bonded
in an elastomeric ring, which loads the fl exing element
in compression to transmit torque. Misalignment motion
is accommodated by defl ecting the elastomer in shear,
which allows extreme misalignment without high reaction
forces.
They are ideally suited for light-duty elastomeric universal
joints, particularly where noise reduction or shock attenu-
ation is required.
Absence of metal-to-metal contact through the coupling
eliminates the need for lubrication and maintenance,
while also reducing noise transmissions. Installation
is accomplished by insertion between simple parallel
fl anges. This lightweight coupling element can be
arranged in a single or double series confi guration to
match specifi c torsional stiffness and misalignment
requirements.
Static Load Defl ection Characteristics of
LCR-300-600-046A Reference Curve
Ring-type couplings isolate torsional vibration and
reduce the harmful effects of torsion shock. Torsional
resilience is one important characteristic. Figure 1 shows
the torsional spring rate.
Accommodating axial misalignment along the axis of
shafts without high reaction forces is a unique feature
of ring couplings. Figure 2 shows this load defl ection
relationship.
Ring-type couplings accommodate parallel misalign-
ment with relatively low radial reaction forces imposed
on driving and driven equipment. Figure 3 shows typical
radial load defl ection curves. Load defl ection charac-
teristics for other LCR couplings are available upon
request.
Figure 1 – Typical Load/Defl ection Curves
Figure 2 – Axial Load Defl ection Curves
Figure 3 – Typical Radial Load Defl ection Curves
LCR-300-600-046A
Torque Rating
1440 lb-in
2500
2000
1500
1000
500
0
0 2 4 6 8 10 12
Typical Angle (deg)
Torque (lb-in)
500
400
300
200
100
0
0 0.1 0.2 0.3 0.4 0.5 0.6
Typical Deflection (in)
Load (lb)
LCR-300-600-046A
0 0.1 0.2 0.3 0.4 0.5 0.6
Typical Load Deflection (in)
Load (lb)
LCR-300-600-046A
1000
800
600
200
400
0
1200