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Highly Flexible Couplings

NDE Clarke Pitchline Ltd has many years of experience in supplying Highly Flexible Coupling solutions and has built up a unique expertise in their design, selection and engineering. This means we can offer all the advantages of highly flexible couplings with all the vital technical support and assistance our customers need.We have solved complex problems for a wide range of applications such as static test rigs, mobile plant and marine drive systems, where our Highly Flexible Couplings have delivered improved performance.

Technical Information

  • Max Torque Capacity 44,400 Nm
  • Designed to suit maximum flywheel size SAE 21”
  • Designed to suit maximum driveshaft flange diameter 285mm.
  • Maximum operating speeds 4350 rpm (size CS13)


Features and Benefits

  • Designed to eliminate torsional vibration problems.
  • Designed to be used in conjunction with universal drive shafts.
  • Designed to mount directly onto flywheel of engine.
  • Offered in a variety of torsional stiffness’s.
  • Emergency operation device enables the coupling to continue to operate even when the rubber element fails.


Torsional Vibration Problems

Highly Flexible Couplings are introduced into drivelines where resonance or torsional vibration maybe a problem. This problem often occurs when two dissimilar inertias need to be connected together using a relatively flexible connecting shaft or element. When these conditions occur and the prime mover is an internal combustion engine there is a very strong likelihood that resonance will occur somewhere in the operating speed range.Torsional Vibration Analysis

Resonance can be very harmful to driveline systems with peak torque in excess of 5 times nominal torque being experienced by the driveline elements which can lead to premature failure.

The introduction of a highly flexible coupling can ensure that any resonance will occur outside the normal operating speed range (normally above) thereby eliminating the possibility of these harmful peak torques being experienced.

A wide range of designs are available to suit flywheel to cardanshafts, shafts to shafts and flange to cardanshafts. The flexible elements can be supplied with different degrees of shore hardness which means we can optimise the coupling precisely to meet the system requirements.