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    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.
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Timken Part Number

Description 

Rough Stock Bore Size

Hub Diameter

Length thru Bore

Nominal Torque

Max. Bore (Dimensions ID1/ID2)

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68514424497 N/A LF1 HUB FLNG.31 RSB N/A 0.310 in N/A 1.180 in30.00 mm N/A 0.940 in24.00 mm N/A 90.00 in·lb N/A 0.880 in22.35 mm
68514424499 N/A LF2 HUB FLNG .47 RSB N/A 0.470 in N/A 1.570 in40.00 mm N/A 1.100 in28.00 mm N/A 180.00 in·lb N/A 1.380 in35.05 mm
68514424501 N/A LF4 HUB FLNG .59 RSB N/A 0.590 in N/A 1.770 in45.00 mm N/A 1.180 in30.00 mm N/A 440.00 in·lb N/A 1.75 in44.450 mm
68514424503 N/A LF8 HUB FLNG .71 RSB N/A 0.710 in N/A 2.360 in60.00 mm N/A 1.650 in42.00 mm N/A 885.00 in·lb N/A 2.00 in50.800 mm
68514445202 N/A LF12 HUB FLNG .71 RSB N/A 0.710 in N/A 2.360 in60.00 mm N/A 1.650 in42.00 mm N/A 1240.00 in·lb N/A 2.00 in50.800 mm
68514424505 N/A LF16 HUB FLNG.71 RSB N/A 0.710 in N/A 2.760 in70.00 mm N/A 1.970 in50.00 mm N/A 1770.00 in·lb N/A 2.630 in66.802 mm
68514445200 N/A LF22 HUB FLNG .71 RSB N/A 0.710 in N/A 2.760 in70.00 mm N/A 1.970 in50.00 mm N/A 2430.00 in·lb N/A 2.630 in66.802 mm
68514424507 N/A LF25 HUB FLNG .79 RSB N/A 0.790 in N/A 3.350 in85.00 mm N/A 2.160 in55.00 mm N/A 2790.00 in·lb N/A 2.750 in69.85 mm
68514445198 N/A LF28 HUB FLNG .79 RSB N/A 0.790 in N/A 3.350 in85.00 mm N/A 2.160 in55.00 mm N/A 3700.00 in·lb N/A 2.750 in69.85 mm
68514424509 N/A LF30 HUB FLNG .98 RSB N/A 0.980 in N/A 3.940 in100.00 mm N/A 2.600 in66.00 mm N/A 4400.00 in·lb N/A 3.750 in95.25 mm
68514424513 N/A LF90 HUB FLNG 1.18 RSB N/A 1.180 in N/A 4.920 in125.00 mm N/A 3.150 in80.00 mm N/A 9700 in·lb N/A 4.250 in107.95 mm
68514424515 N/A LF140 HUB FLNG 1.18 RSB N/A 1.180 in N/A 4.920 in125.00 mm N/A 3.150 in80.00 mm N/A 15000.00 in·lb N/A 4.250 in107.95 mm
68514424517 N/A LF250 HUB FLNG 1.57 RSB N/A 1.570 in N/A 6.300 in160.00 mm N/A 3.940 in100.00 mm N/A 26500.00 in·lb N/A 5.000 in127.00 mm
68514424511 N/A LF50/80 HUB FLNG .98 RSB N/A 0.980 in N/A 3.940 in100.00 mm N/A 2.600 in66.00 mm N/A N/A 3.750 in95.25 mm
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