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    Beam Couplings for Encoders

    Ruland 4-beam couplings are manufactured from a single piece of aluminum or stainless steel with multiple spiral (helical) cuts allowing for a zero-backlash encoder coupling with higher accuracy and better overall misalignment capabilities than traditional single beam couplings. They are designed with extra flexibility to provide reduced bearing loads, which is critical in encoders which have small sensitive bearings. Ruland 4-beam couplings have a balanced design for reduced vibration at speeds up to 6,000 RPM. Ruland manufactures two series of 4-beam couplings, P and MW, giving designers a variety of performance and dimensional characteristics to choose from. Ruland manufactures 4-beam couplings in our Marlborough, Massachusetts factory with bore sizes ranging from 3/32” to 1/2” or 3mm to 12mm.

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    1. Ruland PCR18-1/2"-10MM-SS, Four Beam Coupling
      PCR18-1/2"-10MM-SS
      As low as $119.59 $175.40
      Ruland PCR18-1/2"-10MM-SS, 1/2" x 10mm Four Beam Coupling, Stainless Steel, Clamp Style, 1.125" (28.6mm) OD, 1.500" (38.1mm) Length
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    2. Ruland PCR18-1/2"-11MM-SS, Four Beam Coupling
      PCR18-1/2"-11MM-SS
      As low as $119.59 $175.40
      Ruland PCR18-1/2"-11MM-SS, 1/2" x 11mm Four Beam Coupling, Stainless Steel, Clamp Style, 1.125" (28.6mm) OD, 1.500" (38.1mm) Length
      Add to Compare
    3. Ruland PCR18-1/2"-12MM-SS, Four Beam Coupling
      PCR18-1/2"-12MM-SS
      As low as $119.59 $175.40
      Ruland PCR18-1/2"-12MM-SS, 1/2" x 12mm Four Beam Coupling, Stainless Steel, Clamp Style, 1.125" (28.6mm) OD, 1.500" (38.1mm) Length
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    4. Ruland PCR18-1/2"-6MM-SS, Four Beam Coupling
      PCR18-1/2"-6MM-SS
      As low as $119.59 $175.40
      Ruland PCR18-1/2"-6MM-SS, 1/2" x 6mm Four Beam Coupling, Stainless Steel, Clamp Style, 1.125" (28.6mm) OD, 1.500" (38.1mm) Length
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    5. Ruland PCR18-1/2"-7MM-SS, Four Beam Coupling
      PCR18-1/2"-7MM-SS
      As low as $119.59 $175.40
      Ruland PCR18-1/2"-7MM-SS, 1/2" x 7mm Four Beam Coupling, Stainless Steel, Clamp Style, 1.125" (28.6mm) OD, 1.500" (38.1mm) Length
      Add to Compare
    6. Ruland PCR18-1/2"-8MM-SS, Four Beam Coupling
      PCR18-1/2"-8MM-SS
      As low as $119.59 $175.40
      Ruland PCR18-1/2"-8MM-SS, 1/2" x 8mm Four Beam Coupling, Stainless Steel, Clamp Style, 1.125" (28.6mm) OD, 1.500" (38.1mm) Length
      Add to Compare
    7. Ruland PCR18-1/2"-9MM-SS, Four Beam Coupling
      PCR18-1/2"-9MM-SS
      As low as $119.59 $175.40
      Ruland PCR18-1/2"-9MM-SS, 1/2" x 9mm Four Beam Coupling, Stainless Steel, Clamp Style, 1.125" (28.6mm) OD, 1.500" (38.1mm) Length
      Add to Compare
    8. Ruland PSR18-1/2"-10MM-SS, Four Beam Coupling
      PSR18-1/2"-10MM-SS
      As low as $110.57 $162.16
      Ruland PSR18-1/2"-10MM-SS, 1/2" x 10mm Four Beam Coupling, Stainless Steel, Set Screw Style, 1.125" (28.6mm) OD, 1.500" (38.1mm) Length
      Add to Compare
    9. Ruland PSR18-1/2"-11MM-SS, Four Beam Coupling
      PSR18-1/2"-11MM-SS
      As low as $110.57 $162.16
      Ruland PSR18-1/2"-11MM-SS, 1/2" x 11mm Four Beam Coupling, Stainless Steel, Set Screw Style, 1.125" (28.6mm) OD, 1.500" (38.1mm) Length
      Add to Compare
    10. Ruland PSR18-1/2"-12MM-SS, Four Beam Coupling
      PSR18-1/2"-12MM-SS
      As low as $110.57 $162.16
      Ruland PSR18-1/2"-12MM-SS, 1/2" x 12mm Four Beam Coupling, Stainless Steel, Set Screw Style, 1.125" (28.6mm) OD, 1.500" (38.1mm) Length
      Add to Compare
    11. Ruland PSR18-1/2"-6MM-SS, Four Beam Coupling
      PSR18-1/2"-6MM-SS
      As low as $110.57 $162.16
      Ruland PSR18-1/2"-6MM-SS, 1/2" x 6mm Four Beam Coupling, Stainless Steel, Set Screw Style, 1.125" (28.6mm) OD, 1.500" (38.1mm) Length
      Add to Compare
    12. Ruland PSR18-1/2"-7MM-SS, Four Beam Coupling
      PSR18-1/2"-7MM-SS
      As low as $110.57 $162.16
      Ruland PSR18-1/2"-7MM-SS, 1/2" x 7mm Four Beam Coupling, Stainless Steel, Set Screw Style, 1.125" (28.6mm) OD, 1.500" (38.1mm) Length
      Add to Compare
    13. Ruland PSR18-1/2"-8MM-SS, Four Beam Coupling
      PSR18-1/2"-8MM-SS
      As low as $110.57 $162.16
      Ruland PSR18-1/2"-8MM-SS, 1/2" x 8mm Four Beam Coupling, Stainless Steel, Set Screw Style, 1.125" (28.6mm) OD, 1.500" (38.1mm) Length
      Add to Compare
    14. Ruland PSR18-1/2"-9MM-SS, Four Beam Coupling
      PSR18-1/2"-9MM-SS
      As low as $110.57 $162.16
      Ruland PSR18-1/2"-9MM-SS, 1/2" x 9mm Four Beam Coupling, Stainless Steel, Set Screw Style, 1.125" (28.6mm) OD, 1.500" (38.1mm) Length
      Add to Compare
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