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    Bellows Couplings for Motors

    Bellows couplings are zero-backlash and constructed of two anodized aluminum hubs and a stainless steel bellows that serves as the flexible element. This design results in a low inertia zero-backlash coupling that is a good choice for motors coupled to ball screw driven actuators in precision applications. The thin walls of the bellows allow the coupling to flex under misalignment conditions and remain rigid under torsional loads. Bellows couplings have the highest size-for-size torque and torsional stiffness of all Ruland flexible couplings and are preferred in applications where the highest level of accuracy and responsiveness is required.

    Ruland bellows coupling have a balanced design for reduced vibration at speeds up to 10,000 RPM. Bore sizes are available from 1/8” to 1” and 3mm to 25mm and hubs are manufactured in clamp and set screw styles with and without keyways.

    Products

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    Items 1201-1224 of 1336

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    1. Ruland MBCK51-19-17-A, Bellows Coupling
      MBCK51-19-17-A
      As low as $165.82 $243.20
      Ruland MBCK51-19-17-A, 19mm x 17mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 50.8mm, OD 61.3mm Length
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    2. Ruland MBCK51-19-18-A, Bellows Coupling
      MBCK51-19-18-A
      As low as $165.82 $243.20
      Ruland MBCK51-19-18-A, 19mm x 18mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 50.8mm, OD 61.3mm Length
      Add to Compare
    3. Ruland MBCK51-19-19-A, Bellows Coupling
      MBCK51-19-19-A
      As low as $165.82 $243.20
      Ruland MBCK51-19-19-A, 19mm x 19mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 50.8mm, OD 61.3mm Length
      Add to Compare
    4. Ruland MBCK51-20-12-A, Bellows Coupling
      MBCK51-20-12-A
      As low as $165.82 $243.20
      Ruland MBCK51-20-12-A, 20mm x 12mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 50.8mm, OD 61.3mm Length
      Add to Compare
    5. Ruland MBCK51-20-13-A, Bellows Coupling
      MBCK51-20-13-A
      As low as $165.82 $243.20
      Ruland MBCK51-20-13-A, 20mm x 13mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 50.8mm, OD 61.3mm Length
      Add to Compare
    6. Ruland MBCK51-20-14-A, Bellows Coupling
      MBCK51-20-14-A
      As low as $165.82 $243.20
      Ruland MBCK51-20-14-A, 20mm x 14mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 50.8mm, OD 61.3mm Length
      Add to Compare
    7. Ruland MBCK51-20-15-A, Bellows Coupling
      MBCK51-20-15-A
      As low as $165.82 $243.20
      Ruland MBCK51-20-15-A, 20mm x 15mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 50.8mm, OD 61.3mm Length
      Add to Compare
    8. Ruland MBCK51-20-16-A, Bellows Coupling
      MBCK51-20-16-A
      As low as $165.82 $243.20
      Ruland MBCK51-20-16-A, 20mm x 16mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 50.8mm, OD 61.3mm Length
      Add to Compare
    9. Ruland MBCK51-20-17-A, Bellows Coupling
      MBCK51-20-17-A
      As low as $165.82 $243.20
      Ruland MBCK51-20-17-A, 20mm x 17mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 50.8mm, OD 61.3mm Length
      Add to Compare
    10. Ruland MBCK51-20-18-A, Bellows Coupling
      MBCK51-20-18-A
      As low as $165.82 $243.20
      Ruland MBCK51-20-18-A, 20mm x 18mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 50.8mm, OD 61.3mm Length
      Add to Compare
    11. Ruland MBCK51-20-19-A, Bellows Coupling
      MBCK51-20-19-A
      As low as $165.82 $243.20
      Ruland MBCK51-20-19-A, 20mm x 19mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 50.8mm, OD 61.3mm Length
      Add to Compare
    12. Ruland MBCK51-20-20-A, Bellows Coupling
      MBCK51-20-20-A
      As low as $165.82 $243.20
      Ruland MBCK51-20-20-A, 20mm x 20mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 50.8mm, OD 61.3mm Length
      Add to Compare
    13. Ruland MBCK51-22-12-A, Bellows Coupling
      MBCK51-22-12-A
      As low as $165.82 $243.20
      Ruland MBCK51-22-12-A, 22mm x 12mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 50.8mm, OD 61.3mm Length
      Add to Compare
    14. Ruland MBCK51-22-13-A, Bellows Coupling
      MBCK51-22-13-A
      As low as $165.82 $243.20
      Ruland MBCK51-22-13-A, 22mm x 13mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 50.8mm, OD 61.3mm Length
      Add to Compare
    15. Ruland MBCK51-22-14-A, Bellows Coupling
      MBCK51-22-14-A
      As low as $165.82 $243.20
      Ruland MBCK51-22-14-A, 22mm x 14mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 50.8mm, OD 61.3mm Length
      Add to Compare
    16. Ruland MBCK51-22-15-A, Bellows Coupling
      MBCK51-22-15-A
      As low as $165.82 $243.20
      Ruland MBCK51-22-15-A, 22mm x 15mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 50.8mm, OD 61.3mm Length
      Add to Compare
    17. Ruland MBCK51-22-16-A, Bellows Coupling
      MBCK51-22-16-A
      As low as $165.82 $243.20
      Ruland MBCK51-22-16-A, 22mm x 16mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 50.8mm, OD 61.3mm Length
      Add to Compare
    18. Ruland MBCK51-22-17-A, Bellows Coupling
      MBCK51-22-17-A
      As low as $165.82 $243.20
      Ruland MBCK51-22-17-A, 22mm x 17mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 50.8mm, OD 61.3mm Length
      Add to Compare
    19. Ruland MBCK51-22-18-A, Bellows Coupling
      MBCK51-22-18-A
      As low as $165.82 $243.20
      Ruland MBCK51-22-18-A, 22mm x 18mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 50.8mm, OD 61.3mm Length
      Add to Compare
    20. Ruland MBCK51-22-19-A, Bellows Coupling
      MBCK51-22-19-A
      As low as $165.82 $243.20
      Ruland MBCK51-22-19-A, 22mm x 19mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 50.8mm, OD 61.3mm Length
      Add to Compare
    21. Ruland MBCK51-22-20-A, Bellows Coupling
      MBCK51-22-20-A
      As low as $165.82 $243.20
      Ruland MBCK51-22-20-A, 22mm x 20mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 50.8mm, OD 61.3mm Length
      Add to Compare
    22. Ruland MBCK51-22-22-A, Bellows Coupling
      MBCK51-22-22-A
      As low as $165.82 $243.20
      Ruland MBCK51-22-22-A, 22mm x 22mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 50.8mm, OD 61.3mm Length
      Add to Compare
    23. Ruland MBCK51-24-12-A, Bellows Coupling
      MBCK51-24-12-A
      As low as $165.82 $243.20
      Ruland MBCK51-24-12-A, 24mm x 12mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 50.8mm, OD 61.3mm Length
      Add to Compare
    24. Ruland MBCK51-24-13-A, Bellows Coupling
      MBCK51-24-13-A
      As low as $165.82 $243.20
      Ruland MBCK51-24-13-A, 24mm x 13mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 50.8mm, OD 61.3mm Length
      Add to Compare
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    Bore Type
    Unit of Measurement
    1. Inch 154 items
    2. Inch/Metric 541 items
    3. Metric 641 items
    Bore (B1)
    1. 0.1250 in 2 items
    2. 0.1875 in 6 items
    3. 0.2500 in 14 items
    4. 0.3125 in 12 items
    5. 0.3750 in 24 items
    6. 0.5000 in 54 items
    7. 0.6250 in 62 items
    8. 0.7500 in 68 items
    9. 0.8750 in 52 items
    10. 1.0000 in 64 items
    11. 1.1250 in 34 items
    12. 1.2500 in 38 items
    13. 3 mm 1 item
    14. 4 mm 4 items
    15. 5 mm 8 items
    16. 6 mm 11 items
    17. 7 mm 11 items
    18. 8 mm 22 items
    19. 9 mm 18 items
    20. 10 mm 30 items
    21. 11 mm 36 items
    22. 12 mm 44 items
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    25. 15 mm 54 items
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    27. 17 mm 50 items
    28. 18 mm 56 items
    29. 19 mm 62 items
    30. 20 mm 74 items
    31. 21 mm 1 item
    32. 22 mm 48 items
    33. 24 mm 56 items
    34. 25 mm 60 items
    35. 28 mm 32 items
    36. 30 mm 36 items
    37. 32 mm 40 items
    Small Bore (B2)
    1. 0.1250 in 6 items
    2. 0.1875 in 11 items
    3. 0.2500 in 22 items
    4. 0.3125 in 42 items
    5. 0.3750 in 60 items
    6. 0.5000 in 108 items
    7. 0.6250 in 76 items
    8. 0.7500 in 42 items
    9. 0.8750 in 26 items
    10. 1.0000 in 14 items
    11. 1.1250 in 8 items
    12. 1.2500 in 4 items
    13. 3 mm 7 items
    14. 4 mm 13 items
    15. 5 mm 9 items
    16. 6 mm 26 items
    17. 7 mm 20 items
    18. 8 mm 39 items
    19. 9 mm 34 items
    20. 10 mm 54 items
    21. 11 mm 48 items
    22. 12 mm 76 items
    23. 13 mm 60 items
    24. 14 mm 92 items
    25. 15 mm 84 items
    26. 16 mm 68 items
    27. 17 mm 60 items
    28. 18 mm 54 items
    29. 19 mm 49 items
    30. 20 mm 36 items
    31. 22 mm 30 items
    32. 24 mm 22 items
    33. 25 mm 18 items
    34. 28 mm 10 items
    35. 30 mm 6 items
    36. 32 mm 2 items
    Keyway
    1. No 705 items
    2. Yes 631 items
    Outer Diameter (OD)
    1. 0.590 in (15.0 mm) 28 items
    2. 0.750 in (19.1 mm) 36 items
    3. 1.000 in (25.4 mm) 124 items
    4. 1.313 in (33.3 mm) 181 items
    5. 1.625 in (41.3 mm) 240 items
    6. 2.000 in (50.8 mm) 307 items
    7. 2.250 in (57.2 mm) 420 items
    Length (L)
    1. 1.076 in (27.3 mm) 28 items
    2. 1.306 in (33.2 mm) 36 items
    3. 1.345 in (34.2 mm) 124 items
    4. 1.700 in (43.2 mm) 181 items
    5. 2.035 in (51.7 mm) 240 items
    6. 2.413 in (61.3 mm) 307 items
    7. 3.235 in (82.2 mm) 420 items
    Static Torque
    1. 2.5 Nm 10 items
    2. 4.5 Nm 15 items
    3. 6.8 Nm 55 items
    4. 13.6 Nm 90 items
    5. 28.0 Nm 132 items
    6. 45.2 Nm 157 items
    7. 60.00 Nm 182 items
    8. 22 lb-in 6 items
    9. 40 lb-in 6 items
    10. 60 lb-in 17 items
    11. 120 lb-in 19 items
    12. 250 lb-in 20 items
    13. 400 lb-in 30 items
    14. 530 lb-in 56 items
    15. 22 lb-in (2.5 Nm) 12 items
    16. 40 lb-in (4.5 Nm) 15 items
    17. 60 lb-in (6.8 Nm) 52 items
    18. 120 lb-in (13.6 Nm) 72 items
    19. 250 lb-in (28.0 Nm) 88 items
    20. 400 lb-in (45.2 Nm) 120 items
    21. 530 lb-in (60.00 Nm) 182 items
    Angular Misalignment
    1. 1.5° 369 items
    2. 2.0° 967 items
    Parallel Misalignment
    1. 0.004 in 29 items
    2. 0.006 in 19 items
    3. 0.010 in 50 items
    4. 0.012 in 56 items
    5. 0.004 in (0.10 mm) 79 items
    6. 0.006 in (0.15 mm) 72 items
    7. 0.010 in (0.25 mm) 208 items
    8. 0.012 in (0.30 mm) 182 items
    9. 0.10 mm 80 items
    10. 0.15 mm 90 items
    11. 0.25 mm 289 items
    12. 0.30 mm 182 items
    Axial Motion
    1. 0.008 in 6 items
    2. 0.010 in 6 items
    3. 0.012 in 17 items
    4. 0.016 in 19 items
    5. 0.020 in 50 items
    6. 0.030 in 56 items
    7. 0.008 in (0.20 mm) 12 items
    8. 0.010 in (0.25 mm) 15 items
    9. 0.012 in (0.30 mm) 52 items
    10. 0.016 in (0.40 mm) 72 items
    11. 0.020 in (0.51 mm) 208 items
    12. 0.030 in (0.76 mm) 182 items
    13. 0.20 mm 10 items
    14. 0.25 mm 15 items
    15. 0.30 mm 55 items
    16. 0.40 mm 90 items
    17. 0.50 mm 289 items
    18. 0.75 mm 182 items
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