Torque limiter

Torque limiters are designated as safety clutches or overload clutches. They represent mechanical devices, which separate the output from the drive when a previously defined limit torque is reached. This prevents drive machines from damage by overloading or blockages.

RUFLEX torque limiter

The RUFLEX® torque limiter reliably provides damage from overloading. The modular system provides solutions for every drive and ensures overload protection for torques up to 6,800 Nm. The RUFLEX® torque limiter can be combined with KTR couplings and customised drive components.

Properties:

  • Torque limiter with a high power density
  • Overload protection up to 6,800 Nm
  • The torque can be adjusted when assembled
  • Corrosion protection by means of zinc-plated and passivated surfaces
  • Simple adjustment of slipping torque using standard tools



Please refer to the respective data sheet for the properties of the individual couplings.

RUFLEX Standard

The RUFLEX® Standard torque limiter reliably provides damage from overloading. The modular system provides solutions for every drive and ensures overload protection for torques up to 6,800 Nm.

RUFLEX® Standard is characterised by its good power density and has good wear resistance. Its slipping torque can be easily set with usual tools. The RUFLEX® torque limiter is zinc-coated and so provides optimum surface protection.

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RUFLEX® Standard

RUFLEX with chain wheel

The RUFLEX® with chain wheel is a torque limiter with an integrated chain wheel, which reliably provides damage from overloading. The modular system provides solutions for every drive and ensures overload protection for torques up to 800 Nm.

 

The RUFLEX® with chain wheel is a complete structural component and is available ex-works with the required torque setting. Other chain wheels are available on request.

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RUFLEX® with chain wheel

RUFLEX max.

The RUFLEX® max. torque limiter has a lengthened design for wider drive components, which reliably provides damage from overloading. The modular system provides solutions for every drive and ensures overload protection for torques up to 6,800 Nm. The RUFLEX® max. can be precisely coordinated to the customer’s dimensions and is also available as an assembly with chain wheel.

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RUFLEX® max.

RUFLEX with ROTEX

The RUFLEX® with ROTEX® is a torque limiter with a shaft-to-shaft connection, which reliably provides damage from overloading. The modular system provides solutions for every drive and ensures overload protection for torques up to 6,800 Nm. The RUFLEX® with ROTEX® is a torsionally flexible safety clutch, capable of displacement, the slipping torque of which can be simply adjusted.

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RUFLEX® with ROTEX®

RUFLEX with BoWex

The RUFLEX® with BoWex® is a torque limiter that acts as a torsionally stiff double cardanic shaft-to-shaft connection, which reliably provides damage from overloading. The modular system provides solutions for every drive and ensures overload protection for torques up to 400 Nm.

 

The RUFLEX® with BoWex® has good displacement, thanks to its double cardanic design and provides low-cost torque limitation for shaft-to-shaft connections.

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RUFLEX® with BoWex®

KTR-SI

KTR-SI are overload systems, which can be used for torques up to 8,200 Nm. They are available in ratchet, synchronous, fail-safe and idle rotation design. KTR-SI are available in various designs.

Properties:

  • For torques up to 8,200 Nm
  • They are available in a ratchet, synchronous, fail-safe and idle rotation design
  • Good response accuracy
  • Disengagement in the event of overload by limit switch
  • Maintenance-free
  • Simple assembly and torque setting
  • Combinable with ROTEX®



Please refer to the respective data sheet for the properties of the individual couplings. 

KTR-SI type FT, KT and LT

The KTR-SI types FT, KT and LT are overload systems that can be used for torques up to 8,200 Nm. State-of-the-art simulation and calculation programs are used for the precise design of the torque limiters. They are available in ratchet, synchronous, fail-safe and idle rotation design. 

 

Download data sheets KTR-SI type FT KTR-S type KT KTR-SI type LT

KTR-SI with ROTEX®

The KTR-SI with ROTEX® is an overload system, which can be used in combination with the torsionally flexible ROTEX® coupling. It offers overload protection up to 8,200 Nm. State-ofthe-art simulation and calculation programs are used for the precise design of the torque limiters.

This overload system is maintenance-free, capable of displacement and available with a range of elastomer hardnesses. The torque can be adjusted when assembled.

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KTR-SI with ROTEX®

KTR-SI FRE

The KTR-SI FRE is an idle-rotation overload system with a high level of repeat accuracy. In the event of overloading, the idle rotation elements uncouple the driving and driven side, reliably protecting against damage. Once the overload has been eliminated, the idle rotating elements are manually re-engaged so that the drive is released again.

Properties:

  • Idle-rotation overload system (load-separating) 
  • Good repeating accuracy
  • Flange design for the attachment of pulleys or chains wheels
  • Can be combined with ROTEX®, GEARex® or RADEX®-N
  • The intelligent further development of the shear bolt coupling and hydraulic overload system
  • Setting range up to 60,000 Nm (higher torques on request)



Please refer to the respective data sheet for the properties of the individual couplings.

KTR-SI FRE flange type

The KTR-SI FRE flange type is an idle-rotation overload system with a high level of repeat accuracy. In the event of overloading, the idle rotation elements uncouple the driving and driven side, reliably protecting against damage. The KTR-SI FRE flange type is suitable for the attachment of pulleys and chain wheels and can be combined with ROTEX®, GEARex® or RADEX®-N.

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KTR-SI FRE flange type

KTR-SI with ROTEX®

The KTR-SI FRE with ROTEX® is an idle-rotation overload system with a high level of repeat accuracy. In the event of overloading, the idle rotation elements uncouple the driving and driven side, reliably protecting against damage. The KTR-SI FRE with ROTEX® is the further development of shear bolt couplings and hydraulic overload systems. The system is maintenance-free and torsionally flexible.

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KTR-SI FRE with ROTEX®

SYNTEX

SYNTEX® are positive-locking, backlash-free overload systems. They can be used for torques up to 525 Nm. The SYNTEX® is a punched disk spring, which acts as the component transmitting the torque. These couplings are characterised by their short response times and high repeat precision.

Properties:

  • An overload system with positive operation for torques up to 400 Nm
  • Backlash-free, torsionally stiff
  • Good response accuracy
  • Synchronous and ratchet design
  • Protection of high-value drive units



Please refer to the respective data sheet for the properties of the individual couplings. 

SYNTEX Standard

SYNTEX® Standard overload systems operate with positive locking, are backlash-free and torsionally stiff. It can be used for torques up to 525 Nm. The SYNTEX® Standard has a punched disk spring, which acts as the component transmitting the torque. The drive is switched off by a limit switch or sensor.

The flange version of this overload system can be used at up to 400 Nm. They can be supplied as synchronous and ratchet designs.

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SYNTEX® Standard

SYNTEX with integrated sprocket

SYNTEX® with integrated sprocket is a backlash-free overload system that works on the principle of positive locking. It can be used for torques up to 525 Nm. The SYNTEX® with integrated sprocket can be supplied pre-finished with pre-set torque. This reduces the number of components and the cost, thanks to the integral sprocket. The torque can be adjusted when fitted.

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SYNTEX® with integrated sprocket

SYNTEX with timing belt pulley

The SYNTEX® with pulley is a backlash-free overload system that works on the principle of positive locking. It can be used for torques up to 525 Nm. The SYNTEX® with pulley can be supplied pre-finished with pre-set slipping torque. This reduces the number of components and the cost, thanks to the integral pulley. The torque can be adjusted when fitted.

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SYNTEX® with pulley

SYNTEX with shaft coupling ROTEX GS

The SYNTEX® with shaft coupling ROTEX® GS is an overload system that works on the principle of positive locking and is combined with the backlash-free ROTEX® GS. It can be used for torques up to 525 Nm. The SYNTEX® with shaft coupling ROTEX® GS is backlash-free, torsionally stiff and axial plug-in and is available with various mass moments of inertia and different degrees of elastomer hardness.

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SYNTEX®-NC with ROTEX® GS shaft coupling

SYNTEX-NC

SYNTEX®-NC is a backlash-free overload clutch, which is characterised by its low weight and mass moment of inertia. The compact SYNTEX®-NC has a large bore diameter and an easy-to-assemble clamping ring design.

This overload clutch is based on a ball-latching principle, which permits high repeating accuracy and short reaction times over the entire service life of the coupling. These coupling are primarily used in state-of-the-art machine tools, control and positioning technology, packaging machinery and special-purpose machinery.

Properties:

  • Backlash-free torque transmission
  • Overload protection up to 265 Nm
  • Lightweight design for low mass inertia
  • Short response times
  • Large hole diameter
  • Declining spring characteristic curve



Please refer to the respective data sheet for the properties of the individual couplings.

SYNTEX-NC

SYNTEX®-NC is a backlash-free overload clutch, which is characterised by its low weight and mass moment of inertia. It is compact and has a large bore diameter and an easy-to-assemble clamping ring design. The SYNTEX®-NC can be used for overload systems up to 265 Nm and has a low mass inertia. It is available with a ratchet and synchronous design.

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SYNTEX®-NC

SYNTEX-NC with ROTEX GS

The SYNTEX®-NC with ROTEX® GS is a backlash-free overload clutch, which can be combined with the backlash-free, flexible ROTEX® GS. It has a short design, is torsionally flexible and is capable of compensating for displacement. The SYNTEX®-NC with ROTEX® GS is axial plug-in and electrically isolating.

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SYNTEX®-NC with ROTEX® GS

SYNTEX-NC with TOOLFLEX

The SYNTEX®-NC with TOOLFLEX® is a backlash-free overload clutch, which can be combined with the backlash-free, torsionally stiff TOOLFLEX®. It can be displaced and is characterised by its low weight and mass inertia. The SYNTEX®-NC with TOOLFLEX® features a friction-locking clamping hub or taper hub.

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SYNTEX®-NC with TOOLFLEX®

KTR-SI Compact

The KTR-SI Compact is a robust overload system with a decreasing spring characteristic line, which offers overload protection up to 3,100 Nm. The KTR-SI Compact has precise backlash-free torque transmission and a ball bearing connection flange. Its hardened ratchet surfaces provide a long service life.

Properties:

  • Backlash-free overload system with decreasing spring characteristic line
  • Overload protection up to 3,100 Nm
  • Robust design
  • Precise, backlash-free torque transmission
  • Ball bearing connection flange
  • Hardened ratchet surfaces provide for a long service life



Please refer to the respective data sheet for the properties of the individual couplings.

KTR-SI Compact FT with ROTEX GS

The KTR-SI Compact with ROTEX® GS is an overload system combined with the vibrationdamped ROTEX® GS. It is a backlash-free and frictionally-locking shaft-hub connection guaranteeing overload protection of up to 3,100 Nm. The KTR-SI Compact is also available with the torsionally stiff RADEX®-N or RADEX®-NC. The NC with TOOLFLEX® features a frictional-locking clamping hub or taper hub.

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KTR-SI Compact with ROTEX® GS

KTR-SI Compact flange type

The KTR-SI Compact flange type is a torsionally stiff overload system up to 740 Nm. Thanks to its decreasing disk spring, this overload clutch is characterised by its low residual moments and high re-engagement accuracy.

It can also be combined with the backlash-free ROTEX® GS. The KTR-SI Compact flange type is axial plug-in and available in a ratchet and also synchronous design. It can optionally be supplied with a friction-locking shaft-hub connection or with a feather key connection.

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KTR-SI Compact flange type