• RS Stock No. 814-562
  • Brand Ruland
  • Mfr. Part No. PSMR13-4-4-A
Ruland Aluminium Flexible Beam Coupling, PSMR13-4-4-A, Bore A 4mm Bore B 4mm Set Screw
Product Details

Aluminium Flexible Shaft Couplings

Designed to perform where higher speeds, greater misalignment, and limited lubrication would exceed the capabilities of other couplings. Each coupling is manufactured as one piece, thereby eliminating mechanical joints and possible failure points.Two fixing styles available:,Typical applications include encoders, stepper motors, robotics, measuring instruments, servo systems, pumps, valves, fans etc., (i) Set Screw style is secured using one grub-screw per shaft (staggered at 120°) , (ii) Clamp style fixing uses one socket head cap screw per shaft.

Constant velocity couplings with high torque capacity and zero backlash
Torsionally rigid one-piece construction
Not temperature sensitive
High or low speed operation and reversible
No lubrication required
Up to 3° of axial misalignment allowable


The coupling illustrated shows the Clamp style fixing.

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Bore A4mm
Bore B4mm
Outside Diameter12.7mm
FasteningSet Screw
Torsional Stiffness6.66°/Nm
Misalignment - Angular
Misalignment - Parallel0.203mm
Misalignment - Axial0.127mm
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Technical Reference
  • RS Components

    Statement of conformity

    The product detailed below complies with the specifications published by RS Components. Where applicable it provides assurance that electrostatic discharge sensitive devices have been handled and packed under conditions that meet the administrative and technical requirements of the ANSI/ESD S20.20:2014 and BS EN 61340-5-1:2007 Electrostatic Control Standards.
    RS Stock No. 814-562
    Description Ruland Aluminium Flexible Beam Coupling, PSMR13-4-4-A, Bore A 4mm Bore B 4mm Set Screw
    Manufacturer/Brand: Ruland
    Mfr. Part No. PSMR13-4-4-A
    The foregoing information relates to product sold on, or after, the date shown below.
    Date Oct 22, 2017
    RS Components Ltd, Birchington Road, Corby, Northamptonshire, NN17 9RS, UK
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