Disc Couplings, LovejoyLovejoy takes great pride in being able to offer a wide variety of superior disc coupling products in models designed to meet the application needs of today’s worldwide power transmission market.

Disc Couplings, LovejoyUsing advanced design techniques, implementation of Finite Element Analysis, and extensive testing of materials, Lovejoy has developed an innovative disc pack profile design revolutionary to traditional disc pack designs found in the market. This disc pack can accommodate 1/2° to 1-1/2° of angular misalignment, and is used in all Lovejoy disc coupling products.

Lovejoy disc packs are manufactured using high grade stainless steel (AISI-301), ensuring high strength, high endurance to fatigue, and resistance to most environmental conditions.

Lovejoy disc couplings utilize unitized disc packs with 4, 6 or 8 bolt designs. While the 8 bolt design can transmit greater torque than the 6 or 4 bolt design, it is not able to accommodate as much angular misalignment.

Lovejoy couplings can also be fitted with overload bushings to protect the disc pack during momentary torsional overloads.

  • Eliminates the need for lubrication and coupling maintenance

  • Coupling can be inspected without disassembly

  • Condition of disc packs can be inspected with a strobe light while the machine is running
    (Note: It is not recommended that couplings be operated without coupling guards.)

  • Easy to assess equipment misalignment

  • Torsionally rigid without any backlash

  • No wearing parts

  • Resistance to harsh environments

  • Long life when properly sized and aligned

  • High power density (higher torque for a given outside diameter)

  • Lovejoy supports the API-610 Standard up to 3,800 RPM

  • Unitized disc packs ensure repeatability necessary for meeting the balance and piloting requirements as mandated by API-610

Disc Catalog (main catalog) *excludes 4 Bolt & Composite
4 Bolt Disc Catalog (sub-catalog)
Composite Disc Catalog (sub-catalog)
Disc Selection Guide

Disc Couplings, Lovejoy

SU Type Industrial Disc Coupling

  • Single flex plane with two hubs and a single disc pack

  • For angular and axial misalignment only

  • Two SU couplings are often combined with a shaft to make a floating shaft coupling; shaft can be hollow for long light weight floating shaft coupling

Disc Couplings, Lovejoy

SX Type Industrial Disc Coupling

  • Standard disc coupling; 2 hubs, 1 stock length spacer designed to meet industry standard lengths, & 2 unitized disc packs

  • Two flex planes (one at each disc pack) accommodate parallel, angular, and axial misalignment

  • Available in 4, 6 and 8 bolt designs; bore sizes up to 13 inches (330mm)

  • Custom spacer lengths & overload bushing available

Disc Couplings, Lovejoy

DI Type (Drop-In Spacer) Disc Coupling

  • “Drop-In” spacer assembly coupling; 2 hubs and spacer assembly (comprising of the spacer, 2 unitized disc packs, and 2 guard rings)

  • Hubs are piloted - ensures proper centering, as an anti-flail feature

  • Meets API-610 balance and anti-flail requirements

  • Oversized hubs available, allows for the use of smaller couplings where applicable

Disc Couplings, Lovejoy

SXC Type Close Coupled Industrial Disc Coupling

  • Close coupled variation of the SX Type coupling

  • Hubs turned inward and mounted inside the spacer.

  • Can be used with one or both hubs turned outward for different shaft separations.

Disc Couplings, Lovejoy

SXCS Type Close Coupled Split Spacer Disc Coupling

  • Split spacer couplings, where disc packs can be serviced or removed without moving hubs

  • SXCS Type – connecting bolts are installed from the end of the hubs inward, pointing towards the spacer

Disc Couplings, Lovejoy

SXCST Type Close Coupled Split Spacer Dosc Coupling

  • Split spacer couplings, where disc packs can be serviced or removed without moving hubs

  • SXCST Type – connecting bolts are installed from inside the spacer outward, pointing towards the hubs

Disc Couplings, Lovejoy

DIR & DILR Type (Drop-In Spacer) Disc Coupling

  • Disc coupling designed to be a direct replacement for floating shaft gear couplings

  • DIR Type – includes flanged style rigid hubs for mounting to equipment

  • DILR Type – designed to work with existing rigid hubs

Disc Couplings, Lovejoy

Composite Disc (Cooling Tower) Type Disc Coupling

  • Lightweight composite material ensures strength & endurance

  • Stainless steel hubs protect against aggressive environments

  • Corrosion & ultraviolet light resistant

  • Theoretical infinite fatigue life

Disc Couplings, Lovejoy

Mini Disc Style (MD, MDS, and MDSD Series)

  • Zero backlash design

  • Highest torsional stiffness

  • All metal (aluminum hubs, stainless steel discs)

  • Moderate-high torque, low inertia