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Form-Flex & Torsiflex Couplings

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Torsiflex-I Disc Couplings | TB Wood's

Torsiflex-i disc couplings are specifically designed for process pump and general industrial applications. Torsiflex is an all-metal disc coupling requiring no lubrication which incorporates a plug-in feature to allow installation and removal without disturbing the pump alignment.

  • Standard coupling is fully compliant with the requirements of API 610 / ISO 14691
  • Plug-in spacer design allows installation and removal without disturbing the hubs
  • Inch series hub attachment screws (Metric available upon request)
  • Robust disc pack design allows for greater torque load in a smaller coupling, resulting in lower weight
  • Large bolts for high clamp load, increasing frictional torque load, and reduced bolt bending stress
  • Max bores matched to NEMA motor shafts, resulting in up to 60% weight savings per application
  • Smaller diameter and lower weight per HP provide better inherent balance
  • ATEX compliance is standard — Exll 2GDc135degC(T4)
  • Built-in Anti-Flail Feature
  • Zinc Phosphate coating standard
  • Large hubs available on first two sizes
  • Compliance with API 671 / ISO 10441 is available

Product Features

  • Torsiflex-i couplings consist of 2 hubs and a factory assembled transmission unit. 
  • Installation involves fitting the hubs to the machinery shaft ends, introducing the transmission unit, then securing with the attachment screws 
  • MAXIMUM SPEEDS shown are for standard materials. When higher speeds are required please consult Ameridrives Couplings 
  • PEAK TORQUE of 1.75 and MOMENTARY TORQUE of 2.7 times the stated ratings are accepted 
  • SPARK FREE overload protection is provided as a standard feature on all Torsiflex-i couplings, making them suitable for GAS ZONE environments
  • STANDARD COUPLINGS are designed for general purpose applications and are suitable for the majority of process pump, fan, and compressors applications
  • SPECIAL COUPLING versions available include: 
    • Torque overload protection 
    • Limited end float
    • Electrical Insulation
    • Bolted adapters suitable for high cyclic torques


The following standard materials of construction are used in the Torsiflex-i range. Alternative materials are available for special applications and are available on request.

  • Hubs: Carbon Steel 
  • Spacers: Carbon Steel 
  • Adapters: Carbon Steel 
  • Discs: Stainless Steel (301) 
  • Bolts: Alloy Steel 
  • Nuts: Alloy steel 
  • Overload Collars: High strength "non-sparking" material
  • ATEX Approval Certificate No. SIRA 03ATEX205

Click on image below to download pdf. To order hard copies of literature click here.

Product Catalog

  • Flexible Disc Couplings TB Woods Form-Flex & Torsiflex-i

Service Manual

  • Torsiflex-I Coupling Service & Install
  • p-5022-tbw-a4

Related Literature

  • Torsiflex-i Flexible Disc Coupling
  • p-1723-11

Contact Info

TB Wood's Form-Flex & Torsiflex
2000 Clovis Barker Road
San Marcos, TX 78666
Phone: 512-353-4000

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