Rexnord Omega & Viva Couplings
The Rexnord Omega and Rexnord Viva are both non-lubricated, material-flexing, split-in-half elastomeric tyre couplings designed to protect connected equipment from vibration and misalignment. While the Viva is based on the proven design of the Omega, it features upgrades for higher torque density and increased spacing adjustability.
Rexnord Omega Series
The Omega is recognized as the industry benchmark for split-in-half tyre couplings.
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Material Options: Available in standard Orange, Heavy Duty Yellow (HDY) for 25% more torque, and Hydrolytically Stable Green (HSU) for hot/humid environments.
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Easy Maintenance: The split-half element allows for replacement without moving hubs or realigning equipment.
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Application: Widely used in pumps, compressors, industrial fans, and mixers.
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Configurations: Offered in Close Coupled (E) and Spacer (ES) designs.
Rexnord Viva Series
The Viva is an evolution of the Omega, designed to deliver more power in a smaller package.
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Torque Density: Specifically formulated polyurethane allows for greater torque transmission with a smaller coupling size.
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Adjustability: Features two rows of radial holes on hubs, providing more field spacing adjustability than the Omega.
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Overload Protection: Includes a "V" notch design in the flex element that channels stress to provide a uniform centerline tear during severe overloads.
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Global Design: Primarily a metric design intended for global users.
Rexnord Omega
The Rexnord Omega coupling is a non-lubricated, elastomeric "split-in-half" tyre coupling designed for easy installation and maintenance in industrial applications. Its unique design allows the flex element to be replaced without removing the hubs or realigning the connected equipment.
Key Features and Benefits
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Split-in-Half Design: Allows for rapid assembly and replacement, significantly reducing downtime.
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High Misalignment Capacity: Accommodates substantial angular and parallel misalignment while reducing reactionary forces on bearings and seals.
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Vibration Damping: The torsionally soft polyurethane element cushions shock loads and dampens vibration, extending the life of connected machinery.
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Non-Lubricated: Reduces maintenance requirements as it does not require grease or oil.
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Interchangeable Hubs: Reversible hubs can be used for different shaft gaps, which helps reduce inventory costs.
Common Variations
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Orange (Standard): The general-purpose all-around coupling.
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Yellow (HDY - Heavy Duty Yellow): Provides 25% higher torque capacity and 40% higher torsional stiffness than the standard orange element.
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Green (HSU - Hydrolytically Stable Urethane): Designed specifically for hot, humid, or caustic environments where standard urethane might degrade.
Rexnord Viva
The Rexnord Viva is a line of non-lubricated, material-flexing elastomeric tire couplings designed for high torque transmission in a compact size. They are an evolution of the Rexnord Omega series, offering superior torque density and vibration damping.
Key Features
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Split-in-Half Design: Allows for quick replacement of the flexible element without moving hubs or realigning connected equipment.
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Torque Density: Specially formulated polyurethane provides higher torque capacity than standard rubber couplings, allowing for a smaller coupling footprint.
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Overload Protection: Features a patented "V" notch design that provides a uniform failure area, acting as a "mechanical fuse" during severe overloads to protect expensive machinery.
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Low Maintenance: Requires no lubrication and allows for visual inspection during operation.
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High Misalignment Capacity: Effectively cushions shock loads and accommodates shaft misalignment with low reactionary forces.
Available Versions
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V (Close-Coupled): For applications where shaft ends are close together, up to 132 mm.
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VS (Spacer): Ideal for applications requiring specific distances between shaft ends (DBSE), such as pump maintenance.
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VSX (Extended Spacer): Connects shafts with gaps up to 300 mm without needing special hubs.
Common Applications
These couplings are widely used in demanding industrial environments, including:
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Pumps & Compressors
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Mixers & Blowers
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Fans & Cooling Towers
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Food & Beverage Processing
Rexnord Omega & Viva Benefits
Advanced Offset Tolerance
Engineered to manage extreme angular and parallel misalignment while protecting critical shaft bearings from premature wear and failure.
Fast In-Situ Replacement
The unique split-element design allows for rapid installation without disconnecting the motor or hubs, minimizing costly production halts.
Lube-Free Performance
Eliminate greasing schedules and contamination risks with a durable polyurethane design that reduces long-term maintenance expenditure.
Critical Impact Absorption
Torsionally resilient material isolates drive train vibration and absorbs sudden shock loads to increase overall machinery uptime.
Optimized Viva Torque
The Viva series delivers significantly higher power density, allowing for smaller coupling sizes in high-torque industrial envelopes.
Severe Duty Resistance
Formulated to withstand harsh chemical exposure and oily environments, ensuring reliable torque transmission in volatile conditions.
Applications for Rexnord Omega & Viva Couplings
Engineered for absolute reliability, Rexnord Omega and Viva couplings excel across rigorous industrial sectors such as pulp and paper, mining, and chemical processing. These components thrive in grueling conditions where moisture and debris are constant, offering unparalleled durability for pumps, compressors, and fans. By facilitating swift maintenance and minimizing operational pauses, they ensure continuous productivity for essential machinery, even within the most volatile and high-stress power transmission systems.