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
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    The complete LF Series Model 2 is comprised of a cylindrical hub, a flanged hub, a base element, and hardware.

    The Model 2 provides a complete shaft-to-shaft coupling in a range of sizes for all industrial power transmission applications. It is similar to Model 1, except a flanged hub is added to make the shaft to shaft connection.

    Model 2/S allows the drive package to be “blind” connected. As with all S-Style models, axial end float of equipment shafts can be accommodated without harmful push-pull force.
LF Series Torsional Coupling Cylindrical Hubs - Imperial
LF Series Torsional Coupling Flange Hubs w/ Keyway - Imperial-2
Unit of Measure
Items LF Series Torsional Coupling Cylindrical Hubs - Imperial
68514451617
LF Series Complete Coupling, Model 2 - Rough Stock Bores 		LF Series Torsional Coupling Cylindrical Hubs - Imperial
68514444200
LF Series Complete Coupling, Model 2 - Rough Stock Bores 		LF Series Torsional Coupling Cylindrical Hubs - Imperial
68514444189
LF Series Complete Coupling, Model 2 - Rough Stock Bores 		LF Series Torsional Coupling Cylindrical Hubs - Imperial
68514444190
LF Series Complete Coupling, Model 2 - Rough Stock Bores
Description  N/A LF2-CP-HTR60A-MDL2-.39 RSBX.47 RSB N/A LF30-CP-HTR60A-MDL2-RSBXRSB N/A LF50-CP-HTR60A-MDL2-RSBXRSB N/A LF140-CP-HTR60A-MDL2-RSBXRSB
Set Screw Size N/A M8 N/A M16 N/A M16 N/A M20
Coupling Size N/A LF2 N/A LF30 N/A LF50 N/A LF140
Type N/A Complete Coupling
Material N/A High Temperature Rubber (HTR)
Weight N/A 2.50 lb N/A 32.74 lb N/A 33.16 lb N/A 59.40 lb
Outside Diameter N/A 3.350 in85.09 mm N/A 7.870 in199.90 mm N/A 7.870 in199.90 mm N/A 10.240 in260.10 mm
Overall Length N/A 2.360 in59.94 mm N/A 5.51 in139.95 mm N/A 5.51 in139.95 mm N/A 6.610 in167.89 mm
Dimension BE N/A 0.160 in4.00 mm N/A 0.310 in8.00 mm N/A 0.310 in8.00 mm N/A 0.310 in8.00 mm
Dimension ER N/A 0.79 in20 mm N/A 1.97 in50 mm N/A 1.990 in50 mm N/A 2.440 in62.00 mm
Dimension R N/A 0.390 in10.00 mm N/A 0.980 in25.00 mm N/A 0.980 in25.00 mm N/A 1.220 in31.00 mm
Color N/A Metallic
Operating Temperature Range N/A -40 to 194 ºF
Nominal Torque N/A 180.00 in·lb N/A 4400.00 in·lb N/A 6200.00 in·lb N/A 15000.00 in·lb
Max. Torque N/A 530.00 in·lb N/A 12400.00 in·lb N/A 18600.00 in·lb N/A 43400.00 in·lb
Allowable Continuous Vibratory Torque N/A 89.00 in·lb N/A 1770.00 in·lb N/A 2650.00 in·lb N/A 6200.00 in·lb
Length thru Bore N/A 1.100 in28.00 mm N/A 2.600 in66.00 mm N/A 2.600 in66.00 mm N/A 3.150 in80.00 mm
Bore Type N/A Rough Stock Bore
Min. Bore (Dimensions ID1/ID2) N/A 0.440 in N/A 0.810 in N/A 0.810 in N/A 1.190 in
Max. Speed N/A 8000 rpm N/A 4000 rpm N/A 4000 rpm N/A 3600.00 rpm
Flange Diameter (Dimension FD) N/A 2.170 in55.00 mm N/A 5.510 in140.00 mm N/A 5.510 in140.00 mm N/A 6.300 in160.00 mm
Dimension HD N/A 1.57 in40.00 mm N/A 3.940 in100.00 mm N/A 3.940 in100.00 mm N/A 4.920 in125.00 mm
Connection Type A x B  N/A 0.390 x 0.470 inRough Stock Bore x Rough Stock Bore N/A Rough Stock Bore x Rough Stock Bore N/A Rough Stock Bore x Rough Stock Bore N/A Rough Stock Bore x Rough Stock Bore
Axial Hole and Division N/A 2 at 180º N/A 3 at 120º N/A 4 at 90º N/A 4 at 90º
Max. Angular Misalignment 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 0.080 in2.00 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 5.00 º N/A 3.00 º N/A 3.00 º
Wind-Up Angle at Max. Torque N/A 17.00 º N/A 14.00 º N/A 7.50 º N/A 7.50 º
Dynamic Torsional Stiffness N/A 2570.00 in·lb/rad N/A 69000.00 in·lb/rad N/A 168100.00 in·lb/rad N/A 354000.00 in·lb/rad
Static Angular Stiffness N/A 2.66 in·lb/deg N/A 80.00 in·lb/deg N/A 230.00 in·lb/deg N/A 336.00 in·lb/deg
Static Axial Stiffness N/A 130.00 lb/in N/A 1090.00 lb/in N/A 3700.00 lb/in N/A 3700.00 lb/in
Static Radial Stiffness N/A 860.00 lb/in N/A 4280.00 lb/in N/A 12600.00 lb/in N/A 13100.00 lb/in
Shore Hardness N/A 60A
Coupling Type N/A Torsional
Cubic inches N/A 26.48510 in³ N/A 341.27232 in³ N/A 341.27232 in³ N/A 693.10874 in³