The Timken Company
The Timken Company
4500 Mt Pleasant St. NW
N. Canton, OH 44720
Phone: (234) 262-3000
E-Mail: CustomerCAD@timken.com • Web site: www.timken.com
Print Back
    The LF Series coupling is designed with a unique and highly versatile elastomeric element. These can be easily integrated into a variety of coupling configurations to meet several application needs. LF Style elements are available in a variety of materials to match the necessary coupling dampening characteristics for tuning the systems critical speed away from the application operating speed.

    The element can be connected axially to a flywheel adapter plate or flanged hub and radially to a cylindrical center hub using the appropriate bolts. Axial bolt styles include either socket head bolts with a special dry adhesive, or S-Style bolts, which are similar to dowel pins (seen picture below). The radial bolts are used to connect the element to the cylindrical hub. This unique design is remarkably simple, highly effective and gives the LF torsional coupling unmatched performance capabilities. The coupling selection should be verified with a Torsional Vibration Analysis (TVA) of the system.
LF Series Torsional Coupling Cylindrical Hubs - Imperial
Unit of Measure
Items LF Series Torsional Coupling Cylindrical Hubs - Imperial
68514424497
LF Series Flange Hubs - Rough Stock Bore 		LF Series Torsional Coupling Cylindrical Hubs - Imperial
68514424499
LF Series Flange Hubs - Rough Stock Bore 		LF Series Torsional Coupling Cylindrical Hubs - Imperial
68514424501
LF Series Flange Hubs - Rough Stock Bore 		LF Series Torsional Coupling Cylindrical Hubs - Imperial
68514424503
LF Series Flange Hubs - Rough Stock Bore 		LF Series Torsional Coupling Cylindrical Hubs - Imperial
68514445202
LF Series Flange Hubs - Rough Stock Bore
Description  N/A LF1-HUB FLNG-.31 RSB N/A LF2-HUB FLNG-.47 RSB N/A LF4-HUB FLNG-.59 RSB N/A LF8-HUB FLNG-.71 RSB N/A LF12-HUB FLNG-.71 RSB
Rough Stock Bore Size N/A 0.310 in N/A 0.470 in N/A 0.590 in N/A 0.710 in N/A 0.710 in
Coupling Size N/A LF1 N/A LF2 N/A LF4 N/A LF8 N/A LF12
Type N/A Torsional
Thread (Dimension T) N/A M6 N/A M8 N/A M8 N/A M10 N/A M10
Hub Diameter N/A 1.180 in30.00 mm N/A 1.570 in40.00 mm N/A 1.770 in45.00 mm N/A 2.360 in60.00 mm N/A 2.360 in60.00 mm
Length thru Bore N/A 0.940 in24.00 mm N/A 1.100 in28.00 mm N/A 1.180 in30.00 mm N/A 1.650 in42.00 mm N/A 1.650 in42.00 mm
Style N/A Flange
Weight N/A 0.26 lb N/A 0.74 lb N/A 2.80 lb N/A 4.00 lb N/A 4.49 lb
Color N/A Metallic
Operating Temperature Range N/A -40 to 194 ºF
Nominal Torque N/A 90.00 in·lb N/A 180.00 in·lb N/A 440.00 in·lb N/A 885.00 in·lb N/A 1240.00 in·lb
Securing Torque for Mounting Bolt N/A 200.00 in·lb N/A 530.00 in·lb N/A 1100.00 in·lb N/A 2480.00 in·lb N/A 3190.00 in·lb
Allowable Continuous Vibratory Torque N/A 44.00 in·lb N/A 89.00 in·lb N/A 180.00 in·lb N/A 355.00 in·lb N/A 440.00 in·lb
Bore Type N/A Rough Stock Bore
Min. Bore (Dimensions ID1/ID2) N/A 0.310 in8.00 mm N/A 0.500 in12 mm N/A 0.630 in15.00 mm N/A 0.750 in18.00 mm N/A 0.750 in18.00 mm
Max. Bore (Dimensions ID1/ID2) N/A 0.880 in22.35 mm N/A 1.380 in35.05 mm N/A 1.75 in44.450 mm N/A 2.00 in50.800 mm N/A 2.00 in50.800 mm
Max. Speed N/A 10000 rpm N/A 8000 rpm N/A 7000.00 rpm N/A 6500.00 rpm N/A 6500.00 rpm
Speed  N/A 10000.00 rpm N/A 8000.00 rpm N/A 7000.00 rpm N/A 6500.00 rpm N/A 6500.00 rpm
Dimension FD N/A 1.440 in36.58 mm N/A 2.170 in55.12 mm N/A 2.560 in65.02 mm N/A 3.150 in80.01 mm N/A 3.150 in80.01 mm
Dimension FOD N/A 2.200 in N/A 3.350 in N/A 3.940 in N/A 4.720 in N/A 4.720 in
Max. Angular Misalignment N/A 3.00 º N/A 3.00 º N/A 3.00 º N/A 3.00 º N/A 2.00 º
Max. Parallel Misalignment N/A 0.060 in1.50 mm N/A 0.060 in1.50 mm N/A 0.060 in1.50 mm N/A 0.080 in2.00 mm N/A 0.080 in2.00 mm
Wind-Up Angle at Nominal Torque N/A 6.00 º N/A 6.00 º N/A 5.00 º N/A 5.00 º N/A 3.00 º
Wind-Up Angle at Max. Torque N/A 17.00 º N/A 17.00 º N/A 12.00 º N/A 14.00 º N/A 7.50 º
Dynamic Torsional Stiffness N/A 1240.00 in·lb/rad N/A 2570.00 in·lb/rad N/A 7500.00 in·lb/rad N/A 13300.00 in·lb/rad N/A 38900.00 in·lb/rad
Static Angular Stiffness N/A 2.66 in·lb/deg N/A 2.66 in·lb/deg N/A 21.30 in·lb/deg N/A 31.90 in·lb/deg N/A 80.00 in·lb/deg
Static Axial Stiffness N/A 220.00 lb/in N/A 130.00 lb/in N/A 430.00 lb/in N/A 430.00 lb/in N/A 1430.00 lb/in
Static Radial Stiffness N/A 860.00 lb/in N/A 860.00 lb/in N/A 2860.00 lb/in N/A 2860.00 lb/in N/A 5710.00 lb/in
Shore Hardness N/A 60A
Cubic inches N/A 4.54960 in³ N/A 12.34475 in³ N/A 18.31785 in³ N/A 36.75936 in³ N/A 36.75936 in³