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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.

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18 Items

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  1. Ruland BC16-9MM-1/4"-A, Bellows Coupling
    BC16-9MM-1/4"-A
    As low as $87.82 $128.81
    Ruland BC16-9MM-1/4"-A, 9mm x 1/4" Bellows Coupling, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
  2. Ruland BC16-9MM-5/16"-A, Bellows Coupling
    BC16-9MM-5/16"-A
    As low as $87.82 $128.81
    Ruland BC16-9MM-5/16"-A, 9mm x 5/16" Bellows Coupling, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
  3. Ruland BC21-9MM-5/16"-A, Bellows Coupling
    BC21-9MM-5/16"-A
    As low as $94.83 $139.09
    Ruland BC21-9MM-5/16"-A, 9mm x 5/16" Bellows Coupling, High Stiffness, Aluminum, 1.313" (33.3mm), OD 1.700" (43.2mm) Length
  4. Ruland BCK16-9MM-1/4"-A, Bellows Coupling
    BCK16-9MM-1/4"-A
    As low as $104.27 $152.92
    Ruland BCK16-9MM-1/4"-A, 9mm x 1/4" Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
  5. Ruland BCK16-9MM-5/16"-A, Bellows Coupling
    BCK16-9MM-5/16"-A
    As low as $104.27 $152.92
    Ruland BCK16-9MM-5/16"-A, 9mm x 5/16" Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.000" (25.4mm), OD 1.345" (34.2mm) Length
  6. Ruland BCK21-9MM-5/16"-A, Bellows Coupling
    BCK21-9MM-5/16"-A
    As low as $113.14 $165.94
    Ruland BCK21-9MM-5/16"-A, 9mm x 5/16" Bellows Coupling with Keyways, High Stiffness, Aluminum, 1.313" (33.3mm), OD 1.700" (43.2mm) Length
  7. Ruland MBC25-9-6-A, Bellows Coupling
    MBC25-9-6-A
    As low as $87.82 $128.81
    Ruland MBC25-9-6-A, 9mm x 6mm Bellows Coupling, High Stiffness, Aluminum, 25.4mm, OD 34.2mm Length
  8. Ruland MBC25-9-7-A, Bellows Coupling
    MBC25-9-7-A
    As low as $87.82 $128.81
    Ruland MBC25-9-7-A, 9mm x 7mm Bellows Coupling, High Stiffness, Aluminum, 25.4mm, OD 34.2mm Length
  9. Ruland MBC25-9-8-A, Bellows Coupling
    MBC25-9-8-A
    As low as $87.82 $128.81
    Ruland MBC25-9-8-A, 9mm x 8mm Bellows Coupling, High Stiffness, Aluminum, 25.4mm, OD 34.2mm Length
  10. Ruland MBC25-9-9-A, Bellows Coupling
    MBC25-9-9-A
    As low as $87.82 $128.81
    Ruland MBC25-9-9-A, 9mm x 9mm Bellows Coupling, High Stiffness, Aluminum, 25.4mm, OD 34.2mm Length
  11. Ruland MBC33-9-8-A, Bellows Coupling
    MBC33-9-8-A
    As low as $94.83 $139.09
    Ruland MBC33-9-8-A, 9mm x 8mm Bellows Coupling, High Stiffness, Aluminum, 33.3mm, OD 43.2mm Length
  12. Ruland MBC33-9-9-A, Bellows Coupling
    MBC33-9-9-A
    As low as $94.83 $139.09
    Ruland MBC33-9-9-A, 9mm x 9mm Bellows Coupling, High Stiffness, Aluminum, 33.3mm, OD 43.2mm Length
  13. Ruland MBCK25-9-6-A, Bellows Coupling
    MBCK25-9-6-A
    As low as $104.27 $152.92
    Ruland MBCK25-9-6-A, 9mm x 6mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 25.4mm, OD 34.2mm Length
  14. Ruland MBCK25-9-7-A, Bellows Coupling
    MBCK25-9-7-A
    As low as $104.27 $152.92
    Ruland MBCK25-9-7-A, 9mm x 7mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 25.4mm, OD 34.2mm Length
  15. Ruland MBCK25-9-8-A, Bellows Coupling
    MBCK25-9-8-A
    As low as $104.27 $152.92
    Ruland MBCK25-9-8-A, 9mm x 8mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 25.4mm, OD 34.2mm Length
  16. Ruland MBCK25-9-9-A, Bellows Coupling
    MBCK25-9-9-A
    As low as $104.27 $152.92
    Ruland MBCK25-9-9-A, 9mm x 9mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 25.4mm, OD 34.2mm Length
  17. Ruland MBCK33-9-8-A, Bellows Coupling
    MBCK33-9-8-A
    As low as $113.14 $165.94
    Ruland MBCK33-9-8-A, 9mm x 8mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 33.3mm, OD 43.2mm Length
  18. Ruland MBCK33-9-9-A, Bellows Coupling
    MBCK33-9-9-A
    As low as $113.14 $165.94
    Ruland MBCK33-9-9-A, 9mm x 9mm Bellows Coupling with Keyways, High Stiffness, Aluminum, 33.3mm, OD 43.2mm Length
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