About
One-piece rigid couplings from Ruland do not mar the shaft and have high torsional holding power. They are supplied with proprietary Nypatch® anti-vibration coating, which allows for repeated installations, prevents screws from coming loose during operation, and provides the necessary dissimilar material in stainless steel couplings to reduce galling. Straight bore rigid couplings from Ruland are precision honed to ensure bores are collinear. This is important when the rigid coupling is used in a precision servo system as honing allows for greater surface contact with the shaft and higher torque transmission capabilities. Ruland manufactures one-piece rigid couplings in 1215 lead-free steel with a proprietary black oxide finish, 303 stainless steel, and lightweight 2024 aluminum.

Two-piece rigid couplings have the same benefits as one-piece style with the added advantages of being serviced in-place, opposing hardware for a balanced design and step bores with keyways. They are supplied with proprietary Nypatch® anti-vibration coating, which allows for repeated installations, prevents screws from coming loose during operation, and provides the necessary dissimilar material in stainless steel couplings to reduce galling. Straight bore rigid couplings from Ruland are precision honed to ensure bores are collinear. This is important when the rigid coupling is used in a precision servo system as honing allows for greater surface contact with the shaft and higher torque transmission capabilities. Ruland manufactures two-piece rigid couplings in 1215 lead-free steel with a proprietary black oxide finish and 303 stainless steel.

Set screw rigid couplings from Ruland have precision honed bores to ensure they are collinear. This is important when the rigid coupling is used in a precision servo system or on a mixer as honing allows for greater surface contact with the shaft and higher torque transmission capabilities. Ruland manufactures set screw rigid couplings in 1215 lead-free steel and 303 stainless steel.

Short rigid couplings can be used in applications where space is limited. The short rigid coupling has a reduced torque capability compared to a standard rigid coupling due to its use of a single socket head cap screw per shaft. However, the compact size of the collar reduces inertia making it ideal for motion control applications. Ruland manufactures short rigid couplings in 1215 lead-free steel with a proprietary black oxide finish, 303 stainless steel, and high-strength 2024 aluminum. Bore sizes range from 1/8" to 2" and 6mm to 25mm.

Why Ruland?
- Lower installation costs based on our proprietary Nypatch® coated hardware. This also allows for increased holding power and multiple screw insertions without screws loosening during operation.
- Enhanced holding power, improved corrosion resistance, and a fine glossy finish are achieved through our in-house proprietary black oxide process.
- Designed for reduced vibration and higher speed capabilities, our two-piece styles feature opposing screws, ensuring a balanced design.
- A fine, burr-free finish for environments where cross-contamination is not desirable.
- The highest performance and precision are achieved through careful manufacturing processes in our Marlborough, MA advanced manufacturing facility.
- Superior fit and torque transmission due to precision honing of the bores on straight bore rigid couplings, which ensures collinearity.
- True ratings based on actual testing.
CUSTOM DESIGNS

- Three-piece rigid couplings
- Rigid couplings without center cuts
- Special bore sizes and geometry
- Special lengths, widths, and outside diameters
- Different materials, finishes, or colors
- Custom hardware requests
- And Many Others... Please Contact Us for More Information
Products
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As low as $76.16 $111.71Ruland MCLC-10-10-SS, 10mm x 10mm Rigid Coupling, 303 Stainless Steel, One-Piece Clamp Style with Keyway, 29mm OD, 45mm Length
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As low as $40.25 $59.03Ruland MCLC-12-12-F, 12mm x 12mm Rigid Coupling, Black Oxide Steel, One-Piece Clamp Style with Keyway, 29mm OD, 45mm Length
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As low as $76.16 $111.71Ruland MCLC-12-12-SS, 12mm x 12mm Rigid Coupling, 303 Stainless Steel, One-Piece Clamp Style with Keyway, 29mm OD, 45mm Length
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As low as $48.99 $71.85Ruland MCLC-14-14-F, 14mm x 14mm Rigid Coupling, Black Oxide Steel, One-Piece Clamp Style with Keyway, 34mm OD, 50mm Length
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As low as $105.10 $154.14Ruland MCLC-14-14-SS, 14mm x 14mm Rigid Coupling, 303 Stainless Steel, One-Piece Clamp Style with Keyway, 34mm OD, 50mm Length
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As low as $48.99 $71.85Ruland MCLC-15-15-F, 15mm x 15mm Rigid Coupling, Black Oxide Steel, One-Piece Clamp Style with Keyway, 34mm OD, 50mm Length
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As low as $105.10 $154.14Ruland MCLC-15-15-SS, 15mm x 15mm Rigid Coupling, 303 Stainless Steel, One-Piece Clamp Style with Keyway, 34mm OD, 50mm Length
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As low as $48.99 $71.85Ruland MCLC-16-16-F, 16mm x 16mm Rigid Coupling, Black Oxide Steel, One-Piece Clamp Style with Keyway, 34mm OD, 50mm Length
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As low as $105.10 $154.14Ruland MCLC-16-16-SS, 16mm x 16mm Rigid Coupling, 303 Stainless Steel, One-Piece Clamp Style with Keyway, 34mm OD, 50mm Length
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As low as $58.59 $85.93Ruland MCLC-20-20-F, 20mm x 20mm Rigid Coupling, Black Oxide Steel, One-Piece Clamp Style with Keyway, 42mm OD, 65mm Length
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As low as $139.84 $205.10Ruland MCLC-20-20-SS, 20mm x 20mm Rigid Coupling, 303 Stainless Steel, One-Piece Clamp Style with Keyway, 42mm OD, 65mm Length
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As low as $62.25 $91.30Ruland MCLC-25-25-F, 25mm x 25mm Rigid Coupling, Black Oxide Steel, One-Piece Clamp Style with Keyway, 45mm OD, 75mm Length
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As low as $151.86 $222.72Ruland MCLC-25-25-SS, 25mm x 25mm Rigid Coupling, 303 Stainless Steel, One-Piece Clamp Style with Keyway, 45mm OD, 75mm Length
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As low as $83.57 $122.57Ruland MCLC-30-30-F, 30mm x 30mm Rigid Coupling, Black Oxide Steel, One-Piece Clamp Style with Keyway, 53mm OD, 83mm Length
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As low as $225.32 $330.46Ruland MCLC-30-30-SS, 30mm x 30mm Rigid Coupling, 303 Stainless Steel, One-Piece Clamp Style with Keyway, 53mm OD, 83mm Length
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As low as $117.82 $172.80Ruland MCLC-35-35-F, 35mm x 35mm Rigid Coupling, Black Oxide Steel, One-Piece Clamp Style with Keyway, 67mm OD, 95mm Length
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As low as $293.57 $430.57Ruland MCLC-35-35-SS, 35mm x 35mm Rigid Coupling, 303 Stainless Steel, One-Piece Clamp Style with Keyway, 67mm OD, 95mm Length
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As low as $294.92 $432.54Ruland MCLC-40-40-F, 40mm x 40mm Rigid Coupling, Black Oxide Steel, One-Piece Clamp Style with Keyway, 77mm OD, 108mm Length
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As low as $737.14 $1,081.14Ruland MCLC-40-40-SS, 40mm x 40mm Rigid Coupling, 303 Stainless Steel, One-Piece Clamp Style with Keyway, 77mm OD, 108mm Length
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As low as $354.08 $519.31Ruland MCLC-50-50-F, 50mm x 50mm Rigid Coupling, Black Oxide Steel, One-Piece Clamp Style with Keyway, 85mm OD, 124mm Length
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As low as $875.81 $1,284.52Ruland MCLC-50-50-SS, 50mm x 50mm Rigid Coupling, 303 Stainless Steel, One-Piece Clamp Style with Keyway, 85mm OD, 124mm Length
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As low as $36.59 $53.66Ruland MCLC-8-8-F, 8mm x 8mm Rigid Coupling, Black Oxide Steel, One-Piece Clamp Style with Keyway, 24mm OD, 35mm Length
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As low as $60.40 $88.59Ruland MCLC-8-8-SS, 8mm x 8mm Rigid Coupling, 303 Stainless Steel, One-Piece Clamp Style with Keyway, 24mm OD, 35mm Length
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As low as $132.65 $194.55Ruland MCLX-1 1/2"-35MM-F, 1-1/2" x 35mm Rigid Coupling, Black Oxide Steel, One-Piece Clamp Style, 2.638" (67mm) OD, 3.740" (95mm) Length