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All Product Types > INDUSTRIAL MOTION PRODUCTS > Couplings & Power Transmission Parts Catalog > Torsional Couplings > LF Series > LF Series Cylindrical Hubs - Rough Stock Bore > Part Number 68514445197  
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Part Number 68514445197, LF Series Cylindrical Hubs - Rough Stock Bore


    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.




Unit of Measure: Imperial Metric Both

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

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 
LF28-HUB CYL-.59 RSB

Coupling Size
LF28

Hub Style
Cylindrical

Coupling Type
Torsional

Color
Metallic

Bore Type
Rough Stock Bore

Weight
4.97 lb


Dimensional Data

Rough Stock Bore Size
0.590 in

Thread (Dimension T)
M14

Length thru Bore
2.160 in
55.00 mm

Dimension HD
3.350 in
85.00 mm

Min. Bore (Dimensions ID1/ID2)
0.630 in
15.00 mm

Max. Bore (Dimensions ID1/ID2)
2.130 in
55 mm

Cubic inches
24.24060 in³


Performance Data

Normal Temperature Range
-40 to 194 ºF

Nominal Torque
3700.00 in·lb

Max. Torque
10600.00 in·lb

Allowable Continuous Vibratory Torque
1330.00 in·lb

Max. Speed
5000 rpm

Max. Angular Misalignment
2.00 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
106200.00 in·lb/rad

Static Angular Stiffness
150.00 in·lb/deg

Static Axial Stiffness
3140.00 lb/in

Static Radial Stiffness
8000.00 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



 DOWNLOADS 

Torsional Products Catalog
(PDF, 0KB)

LF Installation Instructions - Hytrel
(PDF, 0KB)

LF Installation Instructions - Model 6
(PDF, 0KB)

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


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