Astro-Tex Co., Inc. - Dynaflex® LCD Series Couplings

Application attachment means:

Flywheel to shaft.
Flywheel to hub (splined).
Shaft to shaft.
Floating shaft.
Many others.

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Unit of Measure

Items	LCD-0040-X-A Dynaflex® LCD Series Couplings	LCD-0040-XX-A Dynaflex® LCD Series Couplings	LCD-0040-X-C Dynaflex® LCD Series Couplings	LCD-0040-XX-C Dynaflex® LCD Series Couplings	LCD-0075-XR-A Dynaflex® LCD Series Couplings
Description	N/A Application attachment means: Flywheel to shaft. Flywheel to hub (splined). Shaft to shaft. Floating shaft. Many others.
Shaft Rating at 2000 rpm	N/A 75 to 2000 hp
Capacity per 100 rpm	N/A 1.59 hp1.18 kW	N/A 1.59 hp1.18 kW	N/A 1.59 hp1.18 kW	N/A 1.59 hp1.18 kW	N/A 4.05 hp3.02 kW
Torque Rating T_N¹	N/A 1000 lbs-in113 N-m	N/A 1000 lbs-in113 N-m	N/A 1000 lbs-in113 N-m	N/A 1000 lbs-in113 N-m	N/A 2500 lbs-in282 N-m
Approximate Slip Torque²	N/A 4800 lbs-in450 N-m	N/A 4800 lbs-in450 N-m	N/A 4800 lbs-in450 N-m	N/A 4800 lbs-in450 N-m	N/A 8700 lbs-in900 N-m
Torsional Rate k_Ø³	N/A 4800 lbs-in/rad542 N-m/rad	N/A 4800 lbs-in/rad542 N-m/rad	N/A 8700 lbs-in/rad983 N-m/rad	N/A 8700 lbs-in/rad983 N-m/rad	N/A 11000 lbs-in/rad1243 N-m/rad
Axial Rate K_A	N/A 700 lbs/in125 N/mm	N/A 700 lbs/in125 N/mm	N/A 1400 lbs/in245 N/mm	N/A 1400 lbs/in245 N/mm	N/A 875 lbs/in153 N/mm
Radial Rate K_R	N/A 4300 lbs/in750 N/mm	N/A 4300 lbs/in750 N/mm	N/A 7700 lbs/in1350 N/mm	N/A 7700 lbs/in1350 N/mm	N/A 5800 lbs/in1015 N/mm
Weight Mass	N/A 3.6 lbs1.63 kg	N/A 3.3 lbs1.50 kg	N/A 3.6 lbs1.63 kg	N/A 3.3 lbs1.50 kg	N/A 6.5 lbs2.95 kg
Inner Member Inertia	N/A 0.01 lbs-in-sec²0.001 kg-m²	N/A 0.01 lbs-in-sec²0.001 kg-m²	N/A 0.01 lbs-in-sec²0.001 kg-m²	N/A 0.01 lbs-in-sec²0.001 kg-m²	N/A 0.04 lbs-in-sec²0.004 kg-m²
Outer Member Inertia	N/A 0.03 lbs-in-sec²0.003 kg-m²	N/A 0.06 lbs-in-sec²0.002 kg-m²	N/A 0.03 lbs-in-sec²0.003 kg-m²	N/A 0.02 lbs-in-sec²0.002 kg-m²	N/A 0.21 lbs-in-sec²0.024 kg-m²
Pilot Outer Diameter⁴	N/A 9.500 in241.30 mm	N/A 8.500 in215.90 mm	N/A 9.500 in241.30 mm	N/A 8.500 in215.90 mm	N/A 8.500 in215.90 mm
B.C. Diameter	N/A 8.750 in222.25 mm	N/A 7.875 in200.03 mm	N/A 8.750 in225.25 mm	N/A 7.875 in200.03 mm	N/A 7.875 in200.03 mm
Diameter C	N/A 1.871 in47.52 mm	N/A 1.871 in47.52 mm	N/A 1.871 in47.52 mm	N/A 1.871 in47.52 mm	N/A 2.875 in73.03 mm
Diameter D⁵	N/A 2.250 in57.15 mm	N/A 2.250 in57.15 mm	N/A 2.250 in57.15 mm	N/A 2.250 in57.15 mm	N/A 3.375 in85.73 mm
Diameter E	N/A 1.777 in45.14 mm	N/A 1.777 in45.14 mm	N/A 1.777 in45.14 mm	N/A 1.777 in45.14 mm	N/A No Counter Bore inNo Counter Bore mm
Length F	N/A 1.50 in38.10 mm	N/A 1.50 in38.10 mm	N/A 1.50 in38.10 mm	N/A 1.50 in38.10 mm	N/A 2.62 in66.55 mm
Length G	N/A	N/A	N/A	N/A	N/A 0.375 in9.53 mm
Length H	N/A 0.75 in19.1 mm	N/A 0.75 in19.1 mm	N/A 0.75 in19.1 mm	N/A 0.75 in19.1 mm	N/A 0.125 in3.18 mm
Length I	N/A	N/A	N/A	N/A	N/A 25 in6.35 mm
Length J	N/A	N/A	N/A	N/A	N/A No Counter Bore inNo Counter Bore mm
Hole Diameter K	N/A 0.710 in18.03 mm	N/A 0.710 in18.03 mm	N/A 0.710 in18.03 mm	N/A 0.710 in18.03 mm	N/A 0.321 in8.15 mm
Number of Holes L	N/A 8	N/A 6	N/A 8	N/A 6	N/A 6
Hole Size M	N/A 0.268 in	N/A 0.268 in	N/A 0.268 in	N/A 0.268 in	N/A 3/8 - 16 in
Number of Holes N	N/A 3
Fits SAE Flywheel Number⁶	N/A 7-1/2	N/A 6-1/2	N/A 7-1/2	N/A 6-1/2	N/A 6-1/2
Reference Diameter P	N/A 5.20 in132.1 mm	N/A 5.20 in132.1 mm	N/A 5.20 in132.1 mm	N/A 5.20 in132.1 mm	N/A 6.50 in165.1 mm
Browning Bushing P/N	N/A P1	N/A P1	N/A P1	N/A P1	N/A Q1
Browning Bushing Bore Type 1 Diameter	N/A 1/2 to 1-7/16 in12.70 to 36.51 mm	N/A 1/2 to 1-7/16 in12.70 to 36.51 mm	N/A 1/2 to 1-7/16 in12.70 to 36.51 mm	N/A 1/2 to 1-7/16 in12.70 to 36.51 mm	N/A 3/4 to 2-1/16 in19.05 to 52.3 mm
Browning Bushing Bore Type 2 Diameter	N/A 1-1/2 to 1-3/4 in38.10 to 44.45 mm	N/A 1-1/2 to 1-3/4 in38.10 to 44.45 mm	N/A 1-1/2 to 1-3/4 in38.10 to 44.45 mm	N/A 1-1/2 to 1-3/4 in38.10 to 44.45 mm	N/A 2-1/8 to 2-11/16 in54.0 to 68.3 mm
General Description	N/A The Dynaflex coupling line has been developed to overcome numerous torsional problems associated with vehicular and industrial driveline systems. These couplings increase equipment life by protecting against torsional vibration, shock and misalignment. Other significant features and benefits are: *Vibration Isolation:* extremely low torsional spring rate is achieved with the Dynaflex coupling, using elastomer in shear. This allows for low system natural frequencies and isolation of first mode driveline disturbances. *Damping at Resonance:* the elastomer used in LCD couplings effectively reduces vibration at resonance. *Shock Protection:* torsional shock loads are attenuated by large shear deflection of the elastomer. In the case of severe overloads, equipment damage is prevented by slippage between the elastomer and the outer housing. *Misalignment Accommodation:* elastomer flexibility allows for angular, parallel and axial misalignment. *Long Service Life:* Lord Dynaflex couplings have proven themselves under demanding and rugged service conditions. *Maintenance Free:* elastomer flexibility accommodates all motion without wear, eliminates the need for lubrication. *Noise Reduction:* no metal-to-metal contact; elastomer attenuates structure-borne noise and isolates vibration from components that would act as noise generators. *Attachment:* fits many standard SAE flywheels. *Design Flexibility:* standard rubber molds are used to produce each different size coupling shown in this catalog. Often it is necessary to change metal components for custom applications. This is common. *Systems Engineering:* Lord has in-house computer capabilities for multi-mass torsional analysis to assist in proper coupling selection.
Note	N/A Blind assembly style with a notched periphery provides trouble-free, sliding assembly on flywheel drive pins when bolted access is not possible. Outer member is a composite material.	N/A Use Woods Sure-Grip® Bushing type SH or equivalent.	N/A Blind assembly style with a notched periphery provides trouble-free, sliding assembly on flywheel drive pins when bolted access is not possible. Outer member is a composite material.	N/A Use Woods Sure-Grip® Bushing type SH or equivalent.	N/A Tapered.
¹ Prolonged exposure to temperatures in the 0 ºF range and below produces a significantly reduced slip torque prior to driveline warm-up. This condition may result in the coupling's inability to transmit adequate drive torque for applications experiencing unusual cold temperature related parasitic loading. ² Prolonged exposure to temperatures in the 0 ºF range and below produces a significantly reduced slip torque prior to driveline warm-up. This condition may result in the coupling's inability to transmit adequate drive torque for applications experiencing unusual cold temperature related parasitic loading. ³ Prolonged exposure to temperatures in the 0 ºF range and below produces a significantly reduced slip torque prior to driveline warm-up. This condition may result in the coupling's inability to transmit adequate drive torque for applications experiencing unusual cold temperature related parasitic loading. ⁴ Pilot diameter tolerances are + 0.000/ -0.005 in. for "A" and + 0.005/ -0.000 in. for "C" diameters. ⁵ Pilot diameter tolerances are + 0.000/ -0.005 in. for "A" and + 0.005/ -0.000 in. for "C" diameters. ⁶ Refer to SAE J620c for flywheel numbers 6-1/2, 10, 11-1/2, 16; to SAE J927a for numbers 60, 80, 100, 120, 160.