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All Product Types > INDUSTRIAL MOTION PRODUCTS > Couplings & Power Transmission Parts Catalog > Torsional Couplings > LF Series > LF Series Complete Coupling, Model 2 - Rough Stock Bores > Part Number 68514444189  
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Part Number 68514444189, LF Series Complete Coupling, Model 2 - Rough Stock Bores


    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: Imperial Metric Both

Notes  · Specifications  · Dimensional Data  · Performance Data  · Torsional Element Specifications  · Features  · Model Specifications

Notes

Disclaimer
Lovejoy: CAD Models are accurate envelope dimensions only. Features such as bore size and keyway are not rendered or are only representative. Contact Lovejoy Technical Support or refer to product catalogs for details.

Notes 
  • 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 
LF50-CP-HTR60A-MDL2-RSBXRSB

Coupling Size
LF50

Type
Complete Coupling

Material
High Temperature Rubber (HTR)

Weight
33.16 lb

Color
Metallic

Bore Type
Rough Stock Bore

Connection Type A x B 
Rough Stock Bore x Rough Stock Bore

Coupling Type
Torsional


Dimensional Data

Set Screw Size
M16

Outside Diameter
7.870 in
199.90 mm

Overall Length
5.51 in
139.95 mm

Dimension BE
0.310 in
8.00 mm

Dimension ER
1.990 in
50 mm

Dimension R
0.980 in
25.00 mm

Length thru Bore
2.600 in
66.00 mm

Min. Bore (Dimensions ID1/ID2)
0.810 in

Flange Diameter (Dimension FD)
5.510 in
140.00 mm

Dimension HD
3.940 in
100.00 mm

Axial Hole and Division
4 at 90º

Cubic inches
341.27232 in³


Performance Data

Operating Temperature Range
-40 to 194 ºF

Nominal Torque
6200.00 in·lb

Max. Torque
18600.00 in·lb

Allowable Continuous Vibratory Torque
2650.00 in·lb

Max. Speed
4000 rpm

Max. Angular Misalignment
3.00 º

Max. Parallel Misalignment
0.080 in
2.00 mm

Wind-Up Angle at Nominal Torque
3.00 º

Wind-Up Angle at Max. Torque
7.50 º

Dynamic Torsional Stiffness
168100.00 in·lb/rad

Static Angular Stiffness
230.00 in·lb/deg

Static Axial Stiffness
3700.00 lb/in

Static Radial Stiffness
12600.00 lb/in

Shore Hardness
60A


Torsional Element Specifications
    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 
  • 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 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.




 DOWNLOADS 

Torsional Products Catalog
(PDF, 0KB)

LF Installation Instructions - Models 1, 2, & 3
(PDF, 0KB)


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