Description
Rexnord Omega E-ES-ES-R series Straight Bore Style-Rough Bore (HRB) 120ย are renowned for their reliable performance, exceptional vibration damping, and ease of maintenance. The HRB 120 hub, a critical component of these industry-leading couplings, is designed for Rough Bore (HRB) shaft mounting, offering versatility and robust power transmission.
Crafted from high-quality steel, the HRB 120 hub ensures durability and long-lasting performance in demanding industrial environments. It is specifically engineered to integrate seamlessly with the Omega series split-in-half flex element, allowing for simplified assembly and disassembly without disturbing connected equipment. This innovative design significantly reduces downtime and streamlines maintenance procedures.
The interchangeable nature of Omega hubs contributes to reduced inventory requirements, as the same hubs can be used with various element sizes and configurations within the E, ES, and ES-R series. This modularity provides flexibility in adapting to different application needs.
The HRB 120 hub, when paired with the Omega elastomeric element, accommodates significant misalignment (angular, parallel, and axial) while minimizing reactionary forces on connected equipment bearings. This helps to extend the lifespan of your valuable machinery. Furthermore, the torsionally soft flex element effectively cushions shock loads and dampens vibration, contributing to quieter operation and enhanced equipment protection.
๐ ๏ธ Overview & Key Specs
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Hub Size: HRB 120 (StraightโBore Roughย Bore)
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Compatible With: Omega E, ES, and ESโR Series elastomeric couplings
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Material: Heavyโduty carbon or stainless steel (varies by variant; stainless versionโ 303SS also available)
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Hub Barrel Outside Diameter: approx. 11.75โณ (โโฏ300โฏmm)
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Hub Shoulder Diameter: approx. 17.625โณ (โโฏ447โฏmm)
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Hub Length: ~6โณ (152โฏmm)
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Straight Bore Capacity: 1.875โณ to 8.25โณ (โโฏ48โฏโโฏ190โฏmm)
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Weight: ~260โ280โฏlb (120โ127โฏkg), depending on steel variant
โ Features & Benefits
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Rough Bore (HRB) Design: Ideal for machining to custom diameters โ accommodates shafts within the full bore range
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Split-in-Half Hub: Facilitates easy mounting/unmounting without disturbing machinery alignment
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High Misalignment Tolerance & Vibration Damping: Works seamlessly with Omega elastomeric elements to cushion shocks, reduce vibrations, and protect bearings
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Interchangeable Modules: Same hub fits multiple Omega coupling versions, simplifying inventory
๐ญ Typical Applications
Ideal for large-scale industrial power transmission setups such as:
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Pumps and compressors
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Fans and blowers
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Mixers and conveyors
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Electric motors and generators
๐ฉ Variants
| Variant | Material | Notes |
|---|---|---|
| Standard Steel | Carbon steel | Most common |
| 303SS | Stainless steel | For corrosion resistance (e.g., Rexnord P/N 10287945, 120 HRB 303SS) |
| 120M (Metric) | Carbon steel | Same bore sizes in inches but labeled metric variant P/N 10287944) |
๐ Sourcing & Part Numbers
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120 HRB 303SS (Stainless) โ P/N: 10287945
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120M HRB (Carbon Steel) โ P/N: 10287944
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120 HRB Standard Steel โ Seek P/N via Rexnord catalogs for non-stainless variant
๐ง Choosing the Right Variant
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Shaft Size Compatibility: Choose 120 HRB hub with bore 1.875โ8.25โณ
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Material Choice: If corrosion is a concern, pick the 303SS stainless option
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Mounting Style: HRB allows machining to exact shaft sizes; ensure access to machine shop
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Coupling Match: A rough bore hub must be used with Omega E, ES, or ESโR elemental hubs
Bearings Specialist Co.,Ltd. was founded in 1999 and has since emerged as a premier supplier of bearings and power transmission components in the Thailand automotive and industrial market place. We offer a wide range of products from leading brands. Our partnersย include TIMKEN, REXNORD,ย RENOLD, OPTIBLET, NSK, NIS, FENNER, FALKย and MOMENTUM
Our Bearings and Industrial Power Transmission Componentsย are used in a variety of industries, including Cement, Construction, Food & Beverage, Mining, Oil & Gas, Palm Oil, Power Plant, Pulp & Paper, Semiconductor manufacturing, Steel, and Mining.
We supply and distribute wide ranges of Bearings, Transmission and Conveyor Chains, Oil seals, Transmission Belts and Pulley, Shaft couplings, Gear Drives, Maintenance Tools and many more.
The key to our continued growth and success lie on our commitment to become the most preferred business partners by providing reliable solution to our customer through the products we distribute and services we provide.
Our commitment, to enhance customer satisfaction is our priority, by creating values for our customer through deep understanding of each application is our greatest assets.
