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    Beam Couplings for Automation & Linear Motion Applications

    Ruland beam couplings are machined from a single piece of aluminum or stainless steel with multiple spiral (helical) cuts allowing for greater torque, torsional stiffness, and parallel misalignment capabilities than commodity style single beam couplings. Ruland manufactures 4- and 6-beam couplings. The 4-beam style (P- and MW-Series) has two sets of two beams allowing for greater flexibility and more compact lengths than 6-beam couplings. They are ideally suited for encoders or other positioning sensors commonly found connected to a servo motor in automation and linear systems. The 6-beam style (F-series) has two sets of three beams for higher torque and torsional stiffness capabilities. They can also be used in encoders where a longer length is needed as well as for light duty power transmission applications such as connecting a stepper motor to a lead screw. It is common to use a 6-beam coupling in an application with low to moderate acceleration/deceleration curves such as an inspection system due to their dampening capabilities.

    Designers of linear and automation systems typically prefer aluminum beam couplings for their cost effectiveness and low inertia. Stainless steel beam couplings have higher torque capacity, but significantly increased inertia than aluminum types. Ruland manufactures beam couplings with a zero-backlash balanced design for smooth operation up to 6,000 RPM. They are available with clamp or set screw attachments in bore sizes ranging from 3/32” to 3/4” and 3mm to 20mm.

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    1. Ruland FCMR19-8-5-A, Six Beam Coupling
      FCMR19-8-5-A
      As low as $37.80 $55.45
      Ruland FCMR19-8-5-A, 8mm x 5mm Six Beam Coupling, Aluminum, Clamp Style, 19.1mm OD, 31.8mm Length
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    2. Ruland FCMR19-8-6-A, Six Beam Coupling
      FCMR19-8-6-A
      As low as $37.80 $55.45
      Ruland FCMR19-8-6-A, 8mm x 6mm Six Beam Coupling, Aluminum, Clamp Style, 19.1mm OD, 31.8mm Length
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    3. Ruland FCMR19-8-7-A, Six Beam Coupling
      FCMR19-8-7-A
      As low as $37.80 $55.45
      Ruland FCMR19-8-7-A, 8mm x 7mm Six Beam Coupling, Aluminum, Clamp Style, 19.1mm OD, 31.8mm Length
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    4. Ruland FCMR19-8-8-A, Six Beam Coupling
      FCMR19-8-8-A
      As low as $37.80 $55.45
      Ruland FCMR19-8-8-A, 8mm x 8mm Six Beam Coupling, Aluminum, Clamp Style, 19.1mm OD, 31.8mm Length
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    5. Ruland FCR12-5/16"-5MM-A, Six Beam Coupling
      FCR12-5/16"-5MM-A
      As low as $37.80 $55.45
      Ruland FCR12-5/16"-5MM-A, 5/16" x 5mm Six Beam Coupling, Aluminum, Clamp Style, 0.750" (19.1mm) OD, 1.250" (31.8mm) Length
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    6. Ruland FCR12-5/16"-6MM-A, Six Beam Coupling
      FCR12-5/16"-6MM-A
      As low as $37.80 $55.45
      Ruland FCR12-5/16"-6MM-A, 5/16" x 6mm Six Beam Coupling, Aluminum, Clamp Style, 0.750" (19.1mm) OD, 1.250" (31.8mm) Length
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    7. Ruland FCR12-5/16"-7MM-A, Six Beam Coupling
      FCR12-5/16"-7MM-A
      As low as $37.80 $55.45
      Ruland FCR12-5/16"-7MM-A, 5/16" x 7mm Six Beam Coupling, Aluminum, Clamp Style, 0.750" (19.1mm) OD, 1.250" (31.8mm) Length
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    8. Ruland FSMR19-8-5-A, Six Beam Coupling
      FSMR19-8-5-A
      As low as $31.66 $46.44
      Ruland FSMR19-8-5-A, 8mm x 5mm Six Beam Coupling, Aluminum, Set Screw Style, 19.1mm OD, 31.8mm Length
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    9. Ruland FSMR19-8-6-A, Six Beam Coupling
      FSMR19-8-6-A
      As low as $31.66 $46.44
      Ruland FSMR19-8-6-A, 8mm x 6mm Six Beam Coupling, Aluminum, Set Screw Style, 19.1mm OD, 31.8mm Length
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    10. Ruland FSMR19-8-7-A, Six Beam Coupling
      FSMR19-8-7-A
      As low as $31.66 $46.44
      Ruland FSMR19-8-7-A, 8mm x 7mm Six Beam Coupling, Aluminum, Set Screw Style, 19.1mm OD, 31.8mm Length
      Add to Compare
    11. Ruland FSMR19-8-8-A, Six Beam Coupling
      FSMR19-8-8-A
      As low as $31.66 $46.44
      Ruland FSMR19-8-8-A, 8mm x 8mm Six Beam Coupling, Aluminum, Set Screw Style, 19.1mm OD, 31.8mm Length
      Add to Compare
    12. Ruland FSR12-5/16"-5MM-A, Six Beam Coupling
      FSR12-5/16"-5MM-A
      As low as $31.66 $46.44
      Ruland FSR12-5/16"-5MM-A, 5/16" x 5mm Six Beam Coupling, Aluminum, Set Screw Style, 0.750" (19.1mm) OD, 1.250" (31.8mm) Length
      Add to Compare
    13. Ruland FSR12-5/16"-6MM-A, Six Beam Coupling
      FSR12-5/16"-6MM-A
      As low as $31.66 $46.44
      Ruland FSR12-5/16"-6MM-A, 5/16" x 6mm Six Beam Coupling, Aluminum, Set Screw Style, 0.750" (19.1mm) OD, 1.250" (31.8mm) Length
      Add to Compare
    14. Ruland FSR12-5/16"-7MM-A, Six Beam Coupling
      FSR12-5/16"-7MM-A
      As low as $31.66 $46.44
      Ruland FSR12-5/16"-7MM-A, 5/16" x 7mm Six Beam Coupling, Aluminum, Set Screw Style, 0.750" (19.1mm) OD, 1.250" (31.8mm) Length
      Add to Compare
    15. Ruland PCMR16-3-3-SS, Four Beam Coupling
      PCMR16-3-3-SS
      As low as $89.78 $131.68
      Ruland PCMR16-3-3-SS, 3mm x 3mm Four Beam Coupling, Stainless Steel, Clamp Style, 15.9mm OD, 20.3mm Length
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    16. Ruland PCMR22-5-5-A, Four Beam Coupling
      PCMR22-5-5-A
      As low as $37.53 $55.04
      Ruland PCMR22-5-5-A, 5mm x 5mm Four Beam Coupling, Aluminum, Clamp Style, 22.2mm OD, 27.0mm Length
      Add to Compare
    17. Ruland PCR10-1/8"-3MM-SS, Four Beam Coupling
      PCR10-1/8-3MM-SS
      As low as $89.78 $131.68
      Ruland PCR10-1/8"-3MM-SS, 1/8" x 3mm Four Beam Coupling, Stainless Steel, Clamp Style, 0.625" (15.9mm) OD, 0.800" (20.3mm) Length
      Add to Compare
    18. Ruland PSMR16-3-3-SS, Four Beam Coupling
      PSMR16-3-3-SS
      As low as $80.07 $117.44
      Ruland PSMR16-3-3-SS, 3mm x 3mm Four Beam Coupling, Stainless Steel, Set Screw Style, 15.9mm OD, 20.3mm Length
      Add to Compare
    19. Ruland PSMR22-5-5-A, Four Beam Coupling
      PSMR22-5-5-A
      As low as $33.30 $48.83
      Ruland PSMR22-5-5-A, 5mm x 5mm Four Beam Coupling, Aluminum, Set Screw Style, 22.2mm OD, 27.0mm Length
      Add to Compare
    20. Ruland PSR10-1/8"-3MM-SS, Four Beam Coupling
      PSR10-1/8"-3MM-SS
      As low as $80.07 $117.44
      Ruland PSR10-1/8"-3MM-SS, 1/8" x 3mm Four Beam Coupling, Stainless Steel, Set Screw Style, 0.625" (15.9mm) OD, 0.800" (20.3mm) Length
      Add to Compare
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    1. Clamp 10 items
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    Unit of Measurement
    1. Inch/Metric 8 items
    2. Metric 12 items
    Bore (B1)
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    2. 0.3125 in 6 items
    3. 3 mm 2 items
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    Small Bore (B2)
    1. 3 mm 4 items
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    Material
    1. 303 Stainless Steel 4 items
    2. Aluminum 16 items
    Outer Diameter (OD)
    1. 0.625 in (15.9 mm) 2 items
    2. 0.750 in (19.1 mm) 6 items
    3. 15.9 mm 2 items
    4. 19.1 mm 8 items
    5. 22.2 mm 2 items
    Length (L)
    1. 0.800 in (20.3 mm) 2 items
    2. 1.250 in (31.8 mm) 6 items
    3. 20.3 mm 2 items
    4. 27.0 mm 2 items
    5. 31.8 mm 8 items
    Static Torque
    1. 0.62 Nm 2 items
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    245. 208.3 lb-in (23.53 Nm) 2 items
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