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All Product Types > INDUSTRIAL MOTION PRODUCTS > Couplings & Power Transmission Parts Catalog > Torsional Couplings > LF Series > LF Series Base Element with Hardware > Part Number 68514438830  
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Part Number 68514438830, LF Series Base Element with Hardware


    The heart of the LF Series coupling is the flexible base element. This element allows the customer to make their own shaft hubs from steel bar stock or use existing hubs. Ideal for quick prototype testing, retrofit and high volume applications.



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 
LF25-ELE-HTR60A-W/HDWR

Coupling Size
LF25

Coupling Type
Torsional

Material
High Temperature Rubber (HTR)

Bore Type
Element w/ Hardware

Color
Black

Weight
1.84 lb


Dimensional Data

Thread (Dimension T)
M14

Length thru Bore
1.570 in
55.00 mm

Dimension HD
3.346 in
85.00 mm

Max. Bore (Dimensions ID1/ID2) - Flanged Hubs
2.750 in
85.00 mm

Cubic inches
70.26708 in³


Performance Data

Normal Temperature Range
-40 to 194 ºF

Nominal Torque
2790.00 in·lb
315.00 N·m

Max. Torque
7740.00 in·lb
875.00 N·m

Allowable Continuous Vibratory Torque
1100.00 in·lb
125.00 N·m

Max. Speed
5000 rpm

Max. Angular Misalignment
3.00 º

Max. Parallel Misalignment
0.080 in
2.00 mm

Wind-Up Angle at Nominal Torque
5.00 º

Wind-Up Angle at Max. Torque
14.00 º

Dynamic Torsional Stiffness
4500.00 Nm/rad

Dynamic Torsional Stiffness
39800.00 in·lb/rad

Static Angular Stiffness
62.00 in·lb/deg
7.00 Nm/deg

Static Axial Stiffness
800.00 lb/in
140.00 Nm/deg

Static Radial Stiffness
3400.00 lb/in
600.00 Nm/deg

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


 MORE IMAGES 

·  LF Series Torsional Base Element - HTR

·  LF Series Torsional Base Element - Hytrel®

·  LF Series Torsional Base Element - Zytel®



 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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