Motion systems often utilize a servo or stepper motor with metric shafting driving a ball screw, lead screw, or encoder with inch shafting. Matching application parameters to a motion control coupling can be a challenging task which becomes more difficult when inch to metric bore combinations are required. Ruland now stocks a full range of motion control couplings with inch to metric bores including beam, bellows, curved jaw, disc, and oldham types. Motion control couplings from Ruland are zero-backlash for accuracy of motion and are manufactured in our Marlborough, MA factory.
Choosing the correct servo coupling can be a difficult process that involves many performance factors including: shaft misalignment, RPM, space restrictions, torque, and others. Motion control couplings from Ruland are available in a wide variety of styles, sizes, and materials to match application requirements critical to system performance. For more information about the differences between each coupling see below.
Bellow Couplings
- Suitable for high torque applications requiring minimal position error.
- Low inertia for responsiveness, balanced for high RPM capabilities.
- No provision for impact loads and limited misalignment capabilities.
- Bore sizes – 1/8” (3mm) to 1” (25mm), 10000 RPM
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Disc Couplings
- Suitable for delicate equipment requiring highly precise positioning.
- Discs allow for misalignment while offering high torsional rigidity.
- Some styles are not suitable for complex or parallel misalignment.
- Bore sizes – 1/8” (3mm) to 1-1/4” (32mm), 10000 RPM
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Oldham Couplings
- Accommodates large amounts of parallel misalignment with low bearing loads while also being electrically isolating.
- Forgiving coupling that is suitable for a wide variety of applications.
- Both shafts must be fully supported and not suitable for push-pull applications.
- Bore sizes – 1/8” (3mm) to 1-1/4” (32mm), 4500 RPM
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Zero Backlash Jaw Couplings
- Dampens impulse loads and is electrically isolating.
- Multiple spider materials for a range of dampening and torque capacity.
- Low misalignment capabilities due to high bearing loads.
- Bore sizes – 1/8” (3mm) to 1-1/4” (32mm), 8000 RPM
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