TB Wood’s Dura-Flex Couplings

General Details

TB Wood’s Dura-Flex Couplings


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TB Wood’s Dura-Flex® couplings are designed from the ground up using finite element analysis to maximize flex life. Perfect for a wide variety of applications — including those with uniform to heavy shock loads — Dura-Flex® couplings employ a light weight element that absorbs shock loading and torsional vibration. These couplings are available in stock bore-to-size (BTS, Taper-Lock® and Sure-Grip® bushed (QT) hubs.

Dura-Flex Couplings Product Specifications

  • Bore-to-size (BTS), Sure-Grip bushed (QD), and Taper-Lock® hubs are available
  • Specially designed “split-in-half flex element” moves stress away from bond, extending flex life
  • Directly interchangeable with similar couplings for fast and easy replacement
  • One spacer size eliminates problems with varying between-shaft spacings
  • Requires no lubrication, minimizing maintenance and downtime
  • Flexible polyurethane material offers superior chemical, dynamic, and weathering properties

Dura-Flex Couplings Product Data

  • Please reference Section F2 of the Flexible Couplings Catalog (P-1690)
  • Installation Sheet – Dura-Flex® Couplings
  • Installation Sheet – Dura-Flex® Couplings – (Metric)

Product Features

  • Up to 4.50 kNm; 39,500 in.lb.
  • Easy to assemble/replace
  • High misalignment ratings
  • No maintenance/lubrication
  • Part-for-part interchangeable with industry standard design
  • In-stock versatile spacer design can accommodate many configurations with few parts
  • Designed from the ground up using finite element analysis to maximize flex life.
  • Easy two piece element installation. No need to move the hubs during replacement.
  • One spacer size to handle most different between shaft spacings.
  • Light weight element absorbs shock loading and torsional vibration.
  • Same hubs used on both spacer and standard elements.
  • Good chemical resistance.


  • ATEX Certification for Dura-Flex® couplings.


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About RSV
Our organization is a specialist in the field of mechanical power transmission coupling, where we have grown steadily over the years and have established our distinct identity for ourselves as a reliable and dependable company providing solution to our customers for their critical couplings applications.

Our motto is to supply quality product to our clients as per their specific requirements and to solve their problems faced in critical applications.

We have a comprehensive inventory of various couplings. We also deal in imported couplings for which we are authorized.