The DI Type coupling has a “Drop-In” spacer assembly that is assembled at the factory. The coupling consists of two hubs and a spacer assembly comprising of the spacer, two unitized disc packs, and two guard rings. The disc packs are bolted to the spacer and guard rings at the factory using the torque values recommended by Lovejoy for the disc pack bolts. With the hubs mounted on the shafts, the entire disc pack assembly can be “Dropped In” place between the two hubs. The hubs are piloted to ensure proper centering of the spacer assembly. This piloting serves as an anti-flail feature and aids in the coupling’s ability to meet the balance standards mandated by API. This style coupling is designed to meet the balance and anti-flail requirements specified in API-610.

    Oversized, or Jumbo, hubs are available for use with the DI Type coupling to allow for larger bore sizes on most DI coupling sizes. This allows for the use of smaller DI couplings in applications where a smaller size coupling can still accommodate the application torque.
    Note: Bolt kits are generally INCLUDED when ordering a DI type hub. Unless ordered as a replacement part, bolt kits are generally not ordered as a stand alone item.
Unit of Measure




Coupling Size

N/A 110-6

Hub Style

N/A Jumbo

Coupling Series

N/A DI-6


N/A Hub Bolt Kits


N/A Steel


N/A Fasteners for Jumbo Hub

Number of Pieces

N/A 9


N/A 1.50 lb

Weight (Complete Coupling w/ Max. Bores)

N/A 12.00 lb6.00 kg

Coupling Type

N/A Gear

Dimensional Data


N/A 12.000 in


N/A 9.000 in


N/A 1.00 in

Cubic inches

N/A 108.00000 in³

Dimensional Data of Related Coupling

Overall Length

N/A 8.19 in208 mm

Max. Bore (Dimensions ID1/ID2)

N/A 2.940 in75.00 mm

Length thru Bore

N/A 1.970 in50.04 mm

Dimension FD

N/A 4.53 in115.00 mm

Distance between Shaft Ends (Dimension BSE)

N/A 4.25 in108 mm

Dimension S

N/A 2.410 in61.00 mm

Performance Data of Related Coupling

Max. Speed (Unbalanced)

N/A 7200 rpm

Max. Speed (Balanced)

N/A 18000 rpm

Nominal Torque

N/A 5100 in·lb575 N·m

Max. Torque

N/A 10200 in·lb1150 N·m

Axial Misalignment (∆ Ka)

N/A 0.083 in2.1 mm

Max. Angular Misalignment

N/A 1.50 º

Torsional Stiffness x 106

N/A 3.4 in·lb/rad0.40 Nm/rad

Rated Power at 100 rpm

N/A 8 hp6 kW



  • Designed to meet the API 610 Standard
  • Support for additional API requirements available on request
  • Unitized disc pack
  • Infinite life if properly aligned
  • Torsionally rigid without any back lash
  • No need for lubrication or maintenance
  • No wearing parts and high resistance to harsh environmental conditions