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    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: Spacers are INCLUDED in a sub-assembly, along with two disc pack kits and two guard rings. Unless ordered as a replacement part, spacers are generally not ordered as a stand alone item.
Unit of Measure



N/A DI90-6 SPC BSE=4.38


N/A Disc

Coupling Series

N/A DI-6


N/A 15.00 lb

Weight (Complete Coupling w/ Max. Bores)

N/A 8.00 lb4.00 Kg

Dimensional Data


N/A 90-6

Length thru Bore

N/A 1.570 in39.88 mm

Spacer Length (OAL)

N/A 2.964 in75.1 mm

Max. Bore (Dimensions ID1/ID2)

N/A 1.68 in43 mm

Flange Diameter (Dimension FD)

N/A 3.7 in94.00 mm

Outside Diameter

N/A 2.360 in60.00 mm

Dimension S

N/A 1.270 in32.00 mm

Distance between Shaft Ends (Dimension BSE)

N/A 4.375 in79.00 mm

Cubic inches

N/A 40.49502 in³

Performance Data

Nominal Torque

N/A 2100 in·lb240 N·m

Max. Torque

N/A 4200 in·lb480 N·m

Max. Speed (Unbalanced)

N/A 9100 rpm

Max. Speed (Balanced)

N/A 22700 rpm

Axial Misalignment (∆ Ka)

N/A 0.059 in1.50 mm

Max. Angular Misalignment

N/A 1.50 º

Torsional Stiffness x 106

N/A 2.40 in·lb/rad0.30 Nm/rad

Rated Power at 100 rpm

N/A 3.50 hp2.60 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
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