Dynaflex LCR manual Dynaflex LCD Series Couplings Installation Guide, Specifications

DYNAFLEX ELASTOMERIC FLEXIBLE COUPLINGS Page 116 of 124

Dynaflex LCD Series Couplings Installation Guide

Specifications

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 Coefficient, Cθ: 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.

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