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

For Angular Misalignment, Torsional Vibration and Shock Protection
A series of highly flexible elastomeric couplings for accessory drives designed to eliminate lubrication and maintenance.

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Items	LCR-275-400-004A Dynaflex® LCR Series Couplings	LCR-275-400-009A Dynaflex® LCR Series Couplings	LCR-275-400-017A† Dynaflex® LCR Series Couplings	LCR-300-600-028A† Dynaflex® LCR Series Couplings	LCR-300-600-046A Dynaflex® LCR Series Couplings
Description	N/A The ring-type coupling line has been developed to overcome numerous torsional problems associated with vehicular and industrial driveline systems. The result is increased equipment life by protecting against torsional vibration, shock and misalignment. Significant benefits are: Misalignment Accommodation: elastomeric flexibility allows for large angular misalignment. For permissible misalignments, including axial and radial, see Table 1. Vibration Isolation: low torsional spring rate is achieved with the elastomeric ring type coupling using rubber in compression. This allows for low system natural frequencies and isolation of first mode driveline disturbances in most driveline systems. Shock Protection: isolates torsional shock, prevents backlash and protects system components, including bearings, from fatigue failure. Long Service Life: Lord ring type couplings have proven themselves under demanding 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. Systems Engineering: Lord has in-house computer capabilities for multi-torsional analysis to assist in proper coupling selection
Shaft Rating at 2000 rpm	N/A 4 to 35 hp
Torque Rating	N/A 125 lbs-in14 N-m	N/A 290 lbs-in33 N-m	N/A 550 lbs-in62 N-m	N/A 880 lbs-in99 N-m	N/A 1440 lbs-in163 N-m
Power per 100 rpm	N/A 0.20 hp0.15 kW	N/A 0.46 hp0.34 kW	N/A 0.87 hp0.65 kW	N/A 1.40 hp1.04 kW	N/A 2.28 hp1.70 kW
Capacity at 1750 rpm	N/A 3.5 hp2.6 kW	N/A 8.1 hp6.0 kW	N/A 15.3 hp11.4 kW	N/A 24.4 hp18.2 kW	N/A 40.0 hp29.8 kW
Capacity at 2000 rpm	N/A 4.0 hp3.0 kW	N/A 9.2 hp6.9 kW	N/A 17.5 hp13.0 kW	N/A 27.9 hp20.8 kW	N/A 45.7 hp34.1 kW
Capacity at 3600 rpm	N/A 7.1 hp5.3 kW	N/A 16.6 hp12.4 kW	N/A 31.4 hp23.4 kW	N/A 50.3 hp37.5 kW	N/A 82.3 hp61.3 kW
Static Torsional Rate - K _θ	N/A 630 lbs-in/rad71 N-m/rad	N/A 1000 lbs-in/rad113 N-m/rad	N/A 2750 lbs-in/rad311 N-m/rad	N/A 9400 lbs-in/rad1062 N-m/rad	N/A 18000 lbs-in/rad2034 N-m/rad
Axial Rate - K_A	N/A 150 lbs/in26 N/mm	N/A 350 lbs/in60 N/mm	N/A 950 lbs/in166 N/mm	N/A 1000 lbs/in175 N/mm	N/A 2300 lbs/in404 N/mm
Radial Rate - K_R	N/A 375 lbs/in66 N/mm	N/A 850 lbs/in149 N/mm	N/A 1300 lbs/in228 N/mm	N/A 1500 lbs/in263 N/mm	N/A 4500 lbs/in790 N/mm
Permissible Angular Misalignment	N/A ± 5 º	N/A ± 4 º	N/A ± 3 º	N/A ± 3 º	N/A ± 2 º
Permissible Axial Misalignment	N/A ± 1/8 in3.18 mm	N/A ± 3/32 in2.38 mm	N/A ± 3/64 in1.19 mm	N/A ± 3/64 in1.19 mm	N/A ± 1/16 in1.59 mm
Permissible Parallel Misalignment	N/A ± 1/16 in1.59 mm	N/A ± 1/16 in1.59 mm	N/A ± 1/32 in0.79 mm	N/A ± 1/32 in0.79 mm	N/A ± 1/32 in0.79 mm
Weight	N/A 0.52 lbs0.236 kg	N/A 0.52 lbs0.236 kg	N/A 1.00 lbs0.454 kg	N/A 0.91 lbs0.413 kg	N/A 0.91 lbs0.413 kg
Inertia¹	N/A 0.0020 lbs-in- sec²226 kg-mm	N/A 0.0020 lbs-in- sec²226 kg-mm	N/A 0.0038 lbs-in- sec²430 kg-mm	N/A 0.0041 lbs-in- sec²463 kg-mm	N/A 0.0041 lbs-in- sec²463 kg-mm
Number of Inserts	N/A 4	N/A 4	N/A 4	N/A 6	N/A 6
B.C. Diameter A	N/A 2.75 in69.85 mm	N/A 2.75 in69.85 mm	N/A 2.75 in69.85 mm	N/A 3.00 in76.20 mm	N/A 3.00 in76.20 mm
Hole Diameter B	N/A 0.32 in8.13 mm	N/A 0.32 in8.13 mm	N/A 0.32 in8.13 mm	N/A 0.39 in9.91 mm	N/A 0.39 in9.91 mm
Coupling Inner Diameter C	N/A 4.00 in101.60 mm	N/A 4.00 in101.60 mm	N/A 4.00 in101.60 mm	N/A 4.06 in103.12 mm	N/A 4.06 in103.12 mm
Coupling Inner Diameter D	N/A 1.62 in41.15 mm	N/A 1.62 in41.15 mm	N/A 1.62 in41.15 mm	N/A 1.88 in47.75 mm	N/A 1.88 in47.75 mm
Length E	N/A 1.00 in25.40 mm	N/A 1.00 in25.40 mm	N/A 1.75 in44.45 mm	N/A 1.53 in38.86 mm	N/A 1.53 in38.86 mm
Insert Diameter F	N/A 0.91 in23.11 mm	N/A 0.91 in23.11 mm	N/A 0.91 in23.11 mm	N/A 1.00 in25.40 mm	N/A 1.00 in25.40 mm
Length G	N/A 0.12 in3.18 mm
Length H	N/A 0.75 in19.05 mm	N/A 0.75 in19.05 mm	N/A 1.50 in38.10 mm	N/A 1.28 in32.50 mm	N/A 1.28 in32.50 mm
General Description	N/A Dynaflex LCR Coupling capacity is rated from 4 to 135 hp at 2000 rpm. These easily installed couplings reduce noise transmission and increase bearing and driveline life through: Greater misalignment accommodation. Isolation of low frequency disturbances. Isolation of torsional shock. Single coupling arrangement consists of two shafts jointed by a single coupling for maximum economy. Double coupling/series arrangement uses two couplings separated by a floating shaft. This provides same torque capacity as single hub arrangement, with twice the permissible angular misalignment and half the torsional stiffness. Superior to single coupling for control of torsional vibration.
Note	N/A Torque Requirements: Torque (lbs.-in.) = 63025 x hp/rpm Lord does not supply hubs. Lord supplies ring elements only.	N/A Torque Requirements: Torque (lbs.-in.) = 63025 x hp/rpm Lord does not supply hubs. Lord supplies ring elements only.	N/A Torque Requirements: Torque (lbs.-in.) = 63025 x hp/rpm Non-Stock Item, please contact Lord Corporation for availability Lord does not supply hubs. Lord supplies ring elements only.	N/A Torque Requirements: Torque (lbs.-in.) = 63025 x hp/rpm Non-Stock Item, please contact Lord Corporation for availability Lord does not supply hubs. Lord supplies ring elements only.	N/A Torque Requirements: Torque (lbs.-in.) = 63025 x hp/rpm Lord does not supply hubs. Lord supplies ring elements only.
¹ Does not include bolts or flanges