Montage of Timken Bearing Products
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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.
Unit of Measure

Notes

Notes 

 N/A
  • For Hytrel, dynamic torsional stiffness values are non-linear with respect to torque. Value given is for 100% of nominal torque.
  • Angular and parallel misalignment values are dependent on speed, and for rubber elements, should be adjusted according to figure 4. Hytrel® elements are only for applications where the driven component is piloted to the driver for SAE and DIN established alignments (i.e. Hydraulic pump flange-mounted to engine flywheel housing).
  • Hytrel® elements are only for applications where the driven component is piloted to the driver for essentially perfect alignment (hydraulic pump flange-mounted to engine housing).

Specifications

Description 

 N/A LF2-CP-HTR60A-MDL2-.39 RSBX.47 RSB

Coupling Size

 N/A LF2

Type

 N/A Complete Coupling

Material

 N/A High Temperature Rubber (HTR)

Weight

 N/A 2.50 lb

Color

 N/A Metallic

Bore Type

 N/A Rough Stock Bore

Connection Type A x B 

 N/A 0.390 x 0.470 inRough Stock Bore x Rough Stock Bore

Coupling Type

 N/A Torsional

Dimensional Data

Set Screw Size

 N/A M8

Outside Diameter

 N/A 3.350 in85.09 mm

Overall Length

 N/A 2.360 in59.94 mm

Dimension BE

 N/A 0.160 in4.00 mm

Dimension ER

 N/A 0.79 in20 mm

Dimension R

 N/A 0.390 in10.00 mm

Length thru Bore

 N/A 1.100 in28.00 mm

Min. Bore (Dimensions ID1/ID2)

 N/A 0.440 in

Flange Diameter (Dimension FD)

 N/A 2.170 in55.00 mm

Dimension HD

 N/A 1.57 in40.00 mm

Axial Hole and Division

 N/A 2 at 180º

Cubic inches

 N/A 26.48510 in³

Performance Data

Operating Temperature Range

 N/A -40 to 194 ºF

Nominal Torque

 N/A 180.00 in·lb

Max. Torque

 N/A 530.00 in·lb

Allowable Continuous Vibratory Torque

 N/A 89.00 in·lb

Max. Speed

 N/A 8000 rpm

Max. Angular Misalignment

 N/A 3.00 º

Max. Parallel Misalignment

 N/A 0.060 in1.50 mm

Wind-Up Angle at Nominal Torque

 N/A 6.00 º

Wind-Up Angle at Max. Torque

 N/A 17.00 º

Dynamic Torsional Stiffness

 N/A 2570.00 in·lb/rad

Static Angular Stiffness

 N/A 2.66 in·lb/deg

Static Axial Stiffness

 N/A 130.00 lb/in

Static Radial Stiffness

 N/A 860.00 lb/in

Shore Hardness

 N/A 60A

Torsional Element Specifications

Torsional Element Specifications

 N/A
    There are two different rubber element materials available, High Temperature Rubber (HTR) and Neoprene (CR). Both elements are torsionally soft and are placed into compression during assembly. Rubber under compression can carry up to 5 times the amount of torque as non-compressed elements. The elements effectively accommodate shock, misalignment, and vibration plus minimize harmful radial and axial forces on the connected equipment. Neoprene (CR) is used in environments that are hostile to High Temperature Rubber (HTR).
    Available Durometer Hardness:
  • 50, 60 (Shore A scale)
    Operating Temperature Range:
  • HTR: -40° to 194° F
  • CR: -40° to 175° F
    Maximum Angular Misalignment:
  • Up to 3°

Features

Features 

 N/A
  • Wide range of standard designs and materials
  • Application versatility
  • Shaft to shaft or flywheel to shaft designs
  • Designed to accommodate substantial shock loads, vibration, and misalignment
  • Low moment of inertia
  • Electrically insulating
  • No lubrication, maintenance free
  • Unique air-flow cooling design
  • Different element stiffness values allow for torsional tuning of applications with diesel engines
  • Economic design allows for cost effective solutions for torsional applications
  • Proven L-LOC spline-clamping hub virtually eliminates spline shaft profile wear and “fretting”
  • Oil, heat, and corrosion resistant elements (Hytrel®, Zytel®)
  • When used with S-bolts, the coupling can accommodate some end float
  • S-bolts accommodate applications requiring “blind” assembly
  • Model 6 unique spacer designs span gaps between equipment in excess of the normal equipment separation
  • Model 6 design available with bearings for high speeds and large amounts of equipment separation

Model Specifications

Model Specifications

 N/A Model 2 and 2/S
    Provides a complete shaft-to-shaft coupling in a range of sizes for all industrial power transmission applications. It is similar to Model 1 shown above, 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.