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The perfect servo coupling - Low cost | Plug-in type, variable bore diameters | Larger shaft misalignment compensation capability | Minimal mass moment of inertia
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- backlash-free transmission of torque
- high torsional stiffness, precision of transmission of rotational angle
- different torsional stiffness
- backlash-free shaft connection
- small dimensions, low moment of inertia
- compensation for radial, axial, and angular misalignment free of wear, maintenance-free, no standstill period
- not sensitive to temperatures between -30 °C and +100 °C, higher temperature ranges available on demand
- simple and operationally safe assembly
- economical and user-friendly due to modular system
- nominal moments between 0.4 - 5000 Nm
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Bellows Couplings
Bellows couplings combine stainless steel bellows and aluminum hubs to offer superior performance in motion control applications. The bellows are made of stainless steel, which makes them ideal for transmitting torque. Due to the bellows' thin walls, the coupling is able to flex easily while remaining rigid under torsional loads. Parallel misalignment, angular misalignment and axial motion are accommodated by bellows.
The combination of aluminum hubs with the bellows results in an extremely lightweight, low inertia coupling. Zero backlash and a long, maintenance-free life are assured since the coupling has no moving parts. An important feature of the bellows coupling is a balanced design to reduce vibration in high rpm applications.
Ruland bellows couplings are offered in six sizes with set screw or Nomar® clamp style hubs and bores ranging from 1/8" (3mm) to 1" (25mm). Stainless steel hubs, keyways, and other custom features are available by special order.
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TOOLFLEX®
* Metal bellow-type
* Bellow made from stainless steel
* Backlash-free, torsionally stiff, maintenance-free
* Coupling for servo and linear drives, positioning systems
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Bellows Coupling BKL
Rated torque from 2-500 Nm
low cost version
self opening clamping
system optional
Bellows Coupling BKC Economy Class
Rated torque from 15-500 Nm
compact design
low cost version
self opening clamping
system optional
Bellows Coupling BK2
Rated torque from 15-1,500 Nm
easy to mount
compact and cost effective
low moment of inertia
speeds up to 40,000 RPM available
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A two-parts aluminum or steel hub element consisting of thin metallic bellow. The unit is designed to accommodate lateral and/or angular misalignment that can occur due to tolerance in machined parts. Good connecter to use between motor, gearbox and drive shafts. Zero windup and backlash with low inertia.
Two hubs with thin metallic Bellow
• Handles angular, parallel & axial misalignment
• 1-2 degrees angular & .010-020 parallel
• Rigid under torsional load
• High accuracy and repeatability at 10,000 RPM
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Features of R W Bellows Couplings:
Compensates for axial, lateral and angular shaft misalignment, also causing quiet, smooth operation
High degree of torsional stiffness
Exact angular transmission of angular motion and torque, zero backlash
Infinite life
Wear and maintenance free
Easy mounting and dismounting
Low lateral stiffness
Low moment of interia
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These torsionally stiff couplings serve for the connection of two shaft ends compensating for angular and parallel misanlignment as well as axial backlash. They are used for the backlash-free and precise angular drive of:
-potentiometers / angle encoders
-resolvers / transducers
-low powered drives
The mounting of the coupling onto the shaft ends is achieved by two set screws each with one cup point per hub. In the case of a smaller than indicated size of bore, an accurate transmission or peak-torque is no longer guaranteed. Larger borings can be supplied on request.
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Miniature Metal Bellows Couplings from R+W
Properties of MK Miniature Couplings:
precise transmission of angular motion and torque
zero backlash
torsionally rigid
infinite life
wear and maintenance free
compensates for axial, angular and lateral misalignment
easy assembly
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- very low mass inertia torque
- easy for assembly
- a small space for assembly
- balanced
- special design available on request
The size of the coupling should be selected so that the nominal torque is greater than the highest torque to be regularly transmitted. (Acceleration or load torque). The shaft misalignments must not exceed the previously mentioned values. Otherwise this will limit the working life of the coupling.
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BELLOW COUPLINGS METAL. "Flexibility and rigidity of torsion" From 15 to 10.000 Nm Diameters of tree from 10 to 180 mm ·For servo very dynamic axes ·Absolutely without play ·Facility of assembly, plug-in version ·Universal scope of application ·Possible speed up to 50.000 t/mn ·Compensation of misalignment ·Without wear ·Weak inertia
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