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    Lovejoy is pleased to be able to provide quality grid couplings covering a large number of industry standard sizes and lengths. The Lovejoy grid style coupling has proven itself in performance and popularity over a wide range of applications.

    Lovejoy’s grid style coupling design has demonstrated its ability to dampen vibration by as much as 30% and can cushion shock loads that could cause damage to both the driving and driven equipment. The tapered grid spring design absorbs impact energy by spreading the energy out over the full length of the grid spring thus reducing the magnitude of the torque spikes.

    The Lovejoy design uses a curved hub tooth profile which creates a progressive contact with the flexible grid spring as the application torque increases. This feature provides a more effective and efficient transmission of power in properly aligned couplings.

    Lovejoy’s versatile design of industry standard hubs and grid springs for both horizontal and vertical cover styles allow Lovejoy couplings to be interchangeable with other industry standard grid couplings and components.

    Proper grid coupling installation and maintenance can add to a longer coupling life. Grid spring replacement is simple and can be performed at a fraction of the cost and time of a complete coupling.
    The Lovejoy Grid coupling is an ideal coupling for applications where excellent performance is desired and additional requirements for vibration dampening may exist. The Horizontal Split Cover design is recommended in applications where there may be some constraints on the diameter of the coupling. The vertical design is recommended for applications where higher speed is one of the requirements.
Features
  • Designed for ease of maintenance and grid spring replacement
  • High tensile grid springs ensure superior coupling performance and longer coupling life
  • Split covers allow for easy access to grid springs
  • Interchangeable with industry standard grid couplings
Unit of Measure

Notes

Disclaimer

 N/A 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 

 N/A
  • Size 1020 thru 1090 hubs are provided with clearance fit bores and 2 set screws at 90°.
  • Size 1100 thru 1200 hubs are provided with interference fit bores and no set screws.
Lovejoy machines Inch bores and keyways to meet tolerances define in the ANSI/AGMA 9002-B04 Standard.

Specifications

Description 

 N/A 1120-HUB-3.7470/3.7485-7/8X7/16KW

Type

 N/A Grid Coupling

Hub Material

 N/A 1045 Steel

Style

 N/A Bored

Color

 N/A Gray/Metallic

Bore Type

 N/A Finished Bore and Keyway

Weight

 N/A 56.00 lb

Dimensional Data

Bore Size 

 N/A 3 3/4 in

Set Screw Style Coupling Size (Dimension T)

 N/A No Setscrew

Keyway Size (W x D)

 N/A 7/8 x 7/16 in

Length thru Bore

 N/A 5.880 in149.35 mm

Overall Length

 N/A 12.000 in304.80 mm

Outside Diameter (Horiontal Style Cover)

 N/A 12.130 in308.00 mm

Outside Diameter (Vertical Style Cover)

 N/A 12.560 in319.00 mm

Min. Bore (Dimensions ID1/ID2)

 N/A 2.375 in60.00 mm

Max. Bore (Dimensions ID1/ID2)

 N/A 5.000 in127.00 mm

Dimension FD

 N/A 9.630 in244.50 mm

Dimension FL

 N/A 0.680 in17.27 mm

Dimension HD

 N/A 7.060 in179.40 mm

Dimension G1

 N/A 0.236 in6.00 mm

Dimension L (Horizontal Style Cover)

 N/A 7.540 in191.52 mm

Dimension L (Vertical Style Cover)

 N/A 2.940 in74.68 mm

Dimension R

 N/A 5.630 in143.00 mm

Distance between Shaft Ends (Dimension G) - Normal Gap

 N/A 0.236 in5.99 mm

Cubic inches

 N/A 293.08037 in³

Performance Data

Nominal Torque

 N/A 121000.00 in·lb

Max. Speed (Horizontal Style Cover)

 N/A 2025.00 rpm

Max. Speed (Vertical Style Cover)

 N/A 2700.00 rpm

Max. Parallel Misalignment at Installation (Dimension P)

 N/A 0.0110 in

Max. Parallel Misalignment during Operation (Dimension P)

 N/A 0.022 in

Max. Angular Misalignment at Installation (X-Y)

 N/A 0.010 in

Max. Angular Misalignment during Operation (X-Y)

 N/A 0.040 in

Coupling Part Numbers

Lovejoy® Grid Coupling Size

 N/A 1120

Falk™ Steelflex® Horizontal Cover Style Coupling Part Number

 N/A 1120T10

Morse® / Browning® Grid-Flex Horizontal Cover Style Coupling Part Number

 N/A GF2120H

Dodge® Grid-Lign® Horizontal Cover Style Coupling Part Number

 N/A 1120T10

Kop-Flex® / Kop-Grid® Horizontal Cover Style Coupling Part Number

 N/A 1120H

Falk™ Steelflex® Vertical Cover Style Coupling Part Number

 N/A 1120T20

Morse® / Browning® Grid-Flex Vertical Cover Style Coupling Part Number

 N/A GF2120V

Dodge® Grid-Lign® Vertical Cover Style Coupling Part Number

 N/A 1120T20

Kop-Flex® / Kop-Grid® Vertical Cover Style Coupling Part Number

 N/A 1120V

Features

Features 

 N/A
  • High tensile, shot-peened alloy steel grid springs and precision machined hubs ensure superior coupling performance and long life.
  • Lovejoy’s grid couplings with tapered grids are designed to be interchangeable with other industry standard grid couplings with both horizontal and vertical grid covers.
  • Lovejoy grid couplings are designed for ease of installation and maintenance reducing labor and downtime costs.
  • The torsional flexibility and resilience of Lovejoy grid couplings helps reduce vibration and cushions shock and impact loads.
  • Cover fasteners can be provided in either Inch or Metric sizes.
  • Excellent for use in applications where the equipment is close coupled or spaced apart requiring a spacer style coupling arrangement.
  • Stock spacer designs are available or requests for custom spacer lengths can be addressed by Lovejoy engineering.