Thomas Disc Couplings

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About Coupling (Sub-brand of Rexnord)

M.T. Thomas revolutionized the coupling industry by inventing the flexible disc coupling in 1919. Today Thomas’ engineers continue to improve the disc coupling through design innovation, modern materials and lean manufacturing processes. The Rex® Thomas® disc coupling is manufactured within a certified ISO 9001 quality system and is unsurpassed in its reputation for quality, reliability and easy maintenance features. The flexible disc packs are engineered for infinite life when applied within the published ratings and environmental guidelines. Our experience and dedication to conservative design standards assures maximum reliability on the most critical drive systems.

Basic Information

Rex Thomas disc couplings are known for high reliability. The Tpack™ advanced technology flexible disc element makes maintenance easy and provides additional torque density. This high quality design functions with our current products and already installed Thomas disc couplings, performing in a variety of applications worldwide.

FUNCTION OF FLEXIBLE COUPLING

  • A flexible coupling is a device used to connect the ends of two shafts, transmit torque, and at the same time, accommodate slight misalignment which develop in service.
    • The primary functions of all flexible couplings are:
      1. To transmit power from one shaft to another, efficiently and effectively.
      2. To accommodate slight shaft misalignment which develop in service.
    • The secondary functions of flexible couplings are:
      1. Protect connected equipment.
        • Absorb shock, vibration and pulsations.
        • Decrease cross load on bearings.
        • Accept load reversals.
        • Minimize backlash.
      2. Minimize “installation” and “maintenance” difficulties. Shafts become misaligned during operation because of settling foundations, the effects of heat, vibration, etc. These misalignment take place in the form of angular misalignment, parallel misalignment, or axial movement of the shafts.
  • Therefore, to get full service life from any flexible coupling, it is necessary to:
    • ASSURE PROPER SHAFT ALIGNMENT DURING INITIAL INSTALLATION.
    • OCCASIONALLY CHECK FOR AND CORRECT SHAFT MISALIGNMENT DURING OPERATION

BENEFITS

  • DISC COUPLING BENEFITS
    • No lubrication
    • Visual inspection
    • No backlash
    • Low restoring forces
    • Wide temperature range
  • REX® THOMAS® BENEFITS
    • High reliability
    • Broad range of styles and sizes
    • Extensive engineering support
    • Custom design capability
    • Global support

Types of Disc Coupling

THOMAS® COUPLING APPLICATION GUIDE

Applications

  • Mixers
  • Compressors
  • Agitators
  • Blowers
  • Fans
  • Centrifugal Pumps
  • Crushers
  • Extruders
  • Hoists
  • Dredges
  • Generators
  • Chippers
  • Calender
  • Mill Drives
  • Conveyors
  • Pulp and Paper machines
  • Line Shafts
  • Pelletizers
  • Turbines
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