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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 68514451617  
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Part Number 68514451617, 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

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 
LF2-CP-HTR60A-MDL2-.39 RSBX.47 RSB

Coupling Size
LF2

Type
Complete Coupling

Material
High Temperature Rubber (HTR)

Weight
2.50 lb

Color
Metallic

Bore Type
Rough Stock Bore

Connection Type A x B 
0.390 x 0.470 in
Rough Stock Bore x Rough Stock Bore

Coupling Type
Torsional


Dimensional Data

Set Screw Size
M8

Outside Diameter
3.350 in
85.09 mm

Overall Length
2.360 in
59.94 mm

Dimension BE
0.160 in
4.00 mm

Dimension ER
0.79 in
20 mm

Dimension R
0.390 in
10.00 mm

Length thru Bore
1.100 in
28.00 mm

Min. Bore (Dimensions ID1/ID2)
0.440 in

Flange Diameter (Dimension FD)
2.170 in
55.00 mm

Dimension HD
1.57 in
40.00 mm

Axial Hole and Division
2 at 180º

Cubic inches
26.48510 in³


Performance Data

Operating Temperature Range
-40 to 194 ºF

Nominal Torque
180.00 in·lb

Max. Torque
530.00 in·lb

Allowable Continuous Vibratory Torque
89.00 in·lb

Max. Speed
8000 rpm

Max. Angular Misalignment
3.00 º

Max. Parallel Misalignment
0.060 in
1.50 mm

Wind-Up Angle at Nominal Torque
6.00 º

Wind-Up Angle at Max. Torque
17.00 º

Dynamic Torsional Stiffness
2570.00 in·lb/rad

Static Angular Stiffness
2.66 in·lb/deg

Static Axial Stiffness
130.00 lb/in

Static Radial Stiffness
860.00 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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