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Oldham Couplings for Automation & Linear Motion

Ruland oldham couplings are a three-piece assembly with a balanced design comprised of two anodized aluminum or stainless steel hubs and a center disk. Oldham couplings are manufactured with a proprietary machining process for smooth interaction between the hub tenons and disk allowing for the longest service life in the industry. Oldham couplings accommodate far more parallel misalignment (up to 10% of the outer diameter) than any other servo coupling offered by Ruland.

Oldham couplings are highly versatile because of the variety of hub and insert materials available. Designers can choose between acetal, Nylon, and PEEK disks to balance torsional rigidity, torque, environmental compliance, and misalignment capabilities. Aluminum oldham couplings are lightweight, cost effective, and offer low bearing loads. These properties make them useful in stop-and-go systems or scanning applications that prioritize rigidity. Stainless steel oldham couplings can be used in corrosive, cleanroom, and vacuum environments when paired with a PEEK disk. This combination is useful for automation or linear systems in food processing applications. In the event of coupling failure, the center disk will act as a torque limiter by breaking cleanly and ceasing power transmission, protecting expensive machine components.

Bore sizes are available from 1/8” to 1-1/8” and 3mm to 30mm. Oldham coupling hubs are available in clamp and set screw styles with or without keyways, allowing designers to mix and match hubs to fit different shaft types.

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12 Items

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  1. Ruland MOSC25-12-A, Oldham Coupling Hub
    MOSC25-12-A
    As low as $18.61 $27.30
    Ruland MOSC25-12-A, 12mm Oldham Coupling Hub, Aluminum, Set Screw Style With Keyway, 25.4mm OD, 11.9mm Length
  2. MOSC25-12-SS
    MOSC25-12-SS
    As low as $45.90 $112.62
    Ruland MOSC25-12-SS, 12mm Oldham Coupling Hub, 303 Stainless Steel, Set Screw Style With Keyway, 25.4mm OD, 11.9mm Length
  3. Ruland MOSC33-12-A, Oldham Coupling Hub
    MOSC33-12-A
    As low as $26.00 $38.13
    Ruland MOSC33-12-A, 12mm Oldham Coupling Hub, Aluminum, Set Screw Style With Keyway, 33.3mm OD, 15.0mm Length
  4. MOSC33-12-SS
    MOSC33-12-SS
    As low as $64.19 $157.48
    Ruland MOSC33-12-SS, 12mm Oldham Coupling Hub, 303 Stainless Steel, Set Screw Style With Keyway, 33.3mm OD, 15.0mm Length
  5. Ruland MOSC41-12-A, Oldham Coupling Hub
    MOSC41-12-A
    As low as $31.25 $45.84
    Ruland MOSC41-12-A, 12mm Oldham Coupling Hub, Aluminum, Set Screw Style With Keyway, 41.3mm OD, 18.0mm Length
  6. MOSC41-12-SS
    MOSC41-12-SS
    As low as $77.11 $189.20
    Ruland MOSC41-12-SS, 12mm Oldham Coupling Hub, 303 Stainless Steel, Set Screw Style With Keyway, 41.3mm OD, 18.0mm Length
  7. Ruland MOST25-12-A, Oldham Coupling Hub
    MOST25-12-A
    As low as $12.82 $18.80
    Ruland MOST25-12-A, 12mm Oldham Coupling Hub, Aluminum, Set Screw Style, 25.4mm OD, 11.9mm Length
  8. MOST25-12-SS
    MOST25-12-SS
    As low as $31.64 $77.64
    Ruland MOST25-12-SS, 12mm Oldham Coupling Hub, 303 Stainless Steel, Set Screw Style, 25.4mm OD, 11.9mm Length
  9. Ruland MOST33-12-A, Oldham Coupling Hub
    MOST33-12-A
    As low as $19.27 $28.26
    Ruland MOST33-12-A, 12mm Oldham Coupling Hub, Aluminum, Set Screw Style, 33.3mm OD, 15.0mm Length
  10. MOST33-12-SS
    MOST33-12-SS
    As low as $47.57 $116.71
    Ruland MOST33-12-SS, 12mm Oldham Coupling Hub, 303 Stainless Steel, Set Screw Style, 33.3mm OD, 15.0mm Length
  11. Ruland MOST41-12-A, Oldham Coupling Hub
    MOST41-12-A
    As low as $23.35 $34.25
    Ruland MOST41-12-A, 12mm Oldham Coupling Hub, Aluminum, Set Screw Style, 41.3mm OD, 18.0mm Length
  12. MOST41-12-SS
    MOST41-12-SS
    As low as $57.65 $141.45
    Ruland MOST41-12-SS, 12mm Oldham Coupling Hub, 303 Stainless Steel, Set Screw Style, 41.3mm OD, 18.0mm Length
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