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REXNORD OMEGA Coupling
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Flexible REX OMEGA Coupling for Agricultural Irrigation Water Pump
Product Details
Model NO.:
Coupling
Torque:
62-6500
Bore Diameter:
10-165
Speed:
1000-5400
Structure:
Flexible
Material:
Carbon Steel+Plastic
Type:
Coupling
Pump Model:
APP/Npp/Wpp/EPP/Aup/Zpp/CPT/Ohhl
Pump Package:
Carton And Wooden Cases
Testing:
Dynamic Balancing
Types Of Welding Parts:
OEM/ODM
Material Standard:
ASTM, ANSI, SAE, Uns, DIN, En, ISO, Toct
Material 1:
Cast Iron, Wear-Resistant Cast Iron, Cast Steel
Material 2:
Stainless Steel, Duplex Ss, Cast Alloy Steel
Certificate:
ISO9001:2015, ISO14001:2004, API Specification Q1
Mould:
Investment Casting Mould, Sand Casting Mould
Pump Model.:
Mc/MD/G Sg/CD8/Bbtd/Msd/Mca/Mce/Mcv
Transport Package:
Carton And Wooden Cases
Specification:
According To The Drawings
Origin:
China
HS Code:
84139100
Production Capacity:
10, 000 Tons Per Year
Highlight:
carbon steel flexible shaft coupling
,plastic coupling for water pump
,agricultural irrigation pump coupling
Payment & Shipping Terms
Minimum Order Quantity
1
Price
35
Product Description
REXNORD Pump Coupling – Installation, Alignment & How to Order
About Dongguan HydroBlue Co., Ltd.
DONGGUAN HydroBlue CO.,LTD. operates as a technology-focused enterprise offering full-spectrum technical solutions across fluid machinery, fluid engineering, industrial automation, and power conversion systems. Our 8-strong engineering team brings together expertise in fluid mechanics, electrical engineering, and electronic engineering to bridge the gap between R&D and commercial production. Ongoing joint development with Jiangsu University, Chinese Academy of Sciences, and Guangdong University of Technology ensures our processes and products stay ahead of industry requirements worldwide. Jiangsu University National Research Center of Pumps contributes to coupling torsional stiffness analysis and pump-drive train natural frequency evaluation for optimized REXNORD coupling selection; Chinese Academy of Sciences develops advanced surface hardening technologies and corrosion-resistant coatings for coupling hub and sleeve service life extension; Guangdong University of Technology integrates laser alignment verification and thermal growth compensation into our coupling installation support tools.
Let us know the pump model and coupling specifications you require — our engineers will cross-reference compatibility and respond with a professional technical assessment.
OUR BRANDS & SERVICES
Our proprietary brand provides complete technical solutions across the fluid machinery and engineering spectrum. Supported by our suite of proprietary technologies and product brands, we provide clients with premium technical consultation, sales assistance, and bundled system solutions — covering pumps, frequency converters, servo drives, PLC-HMI, industrial control cabinets, motors, mechanical seals and systems, couplings, gearboxes, and comprehensive engineering project services (overseas on-site 3D scanning reverse molding of pump replacement parts, and field debugging by our dispatched engineers internationally).
Coupling Installation Guide
- Inspect Shaft Ends — Clean both the motor shaft and pump shaft end faces; remove burrs, corrosion, and old keyway debris
- Fit Hubs on Shafts — Slide the coupling hubs onto their respective shafts; for interference-fit hubs, heat the hub evenly before mounting — never hammer a coupling hub onto a shaft
- Align the Shafts — Rough-align the motor and pump using a straight edge across the hub faces, then fine-align using a dial indicator or laser alignment tool. Achieve both angular and parallel alignment within the coupling's rated misalignment capacity
- Install Flex Element — Mount the flex element (grid spring, elastomer spider, or disc pack) between the hub flanges or sleeves; ensure it is centered and not pinched between the hubs
- Install Guards & Coupling Cover — Install the coupling guard before operating; rotating couplings are a serious pinch-point hazard
- Operate & Re-check Alignment — Run the pump at operating speed and temperature, then verify alignment again; thermal expansion often shifts the relative position of motor and pump
Pump Shaft Alignment Tolerance
|
Pump Speed (RPM) |
Angular Misalignment (mm/100mm) |
Parallel Offset (mm) |
|---|---|---|
|
≤ 1,000 |
≤ 0.10 |
≤ 0.10 |
|
1,000 – 2,000 |
≤ 0.07 |
≤ 0.07 |
|
2,000 – 4,000 |
≤ 0.05 |
≤ 0.05 |
|
> 4,000 |
≤ 0.03 |
≤ 0.03 |
Common Coupling Failure Signs
- Elastomer spider wear / cracking — Visible wear on spider legs; pump vibration increases; replace spider without removing hubs
- Grid spring fatigue — Broken or deformed grid springs; coupling rattle at low speed; replace grid and lubricant
- Disc pack cracking — Lamination separation or through-cracks in disc pack; replace disc pack; check alignment before restart
- Gear tooth wear — Tooth profile wear on gear coupling; vibration and backlash increase; replace gear coupling; investigate lubrication
- Hub bore wear — Fretting or galling inside hub bore on shaft; hub keyway wallowed; replace hub; inspect shaft for damage
How to Order
- Pump & Motor Make/Model — Identify the pump model and motor frame to determine shaft sizes, speed, and torque requirements
- Coupling Type Required — Grid, jaw, disc, or gear coupling; specify if replacing an existing REXNORD coupling
- Shaft Sizes — Pump shaft diameter and motor shaft diameter; specify bore tolerance and keyway size (metric or inch)
- Service Factor — Duty cycle information for correct coupling sizing (continuous, intermittent, shock load)
- Flex Element Material — Standard NBR, Hytrel/urethane, FKM, or stainless disc pack
- Hub Material — Forged steel (standard), SS 304, SS 316, or ductile iron
- Quantity — Single replacement or multiple couplings for pump fleet standardization
- Delivery — 10–25 days after deposit; standard sizes in stock
Payment: 70% T/T deposit, balance against copy of B/L. Small orders via PayPal or Western Union.
FAQ
Q1: Can I replace only the flex element of a REXNORD coupling without replacing the hubs?
A: Yes, the flex element (elastomer spider, grid spring, or disc pack) is a replaceable wear component. The hubs can remain on the shafts unless the hub bore, keyway, or engagement surface is damaged. For grid couplings, also replace the grid lubricant when changing the grid spring.
Q2: What is the most common cause of coupling failure in pump drives?
A: Shaft misalignment is the most frequent cause. Even minor alignment deviation accelerates flex element wear, generates vibration, and overloads pump bearings and seals. Misalignment can be caused by incorrect initial installation, thermal growth, pipe strain on the pump casing, or foundation settlement. Regular alignment checks at each installation event and after pump maintenance are the best prevention.
Q3: Do you supply coupling guards compatible with REXNORD couplings?
A: Yes. We can supply sheet metal or mesh coupling guards to the dimensions of your coupling assembly, compliant with ISO 13857 and OSHA guarding standards. Provide the installed coupling OD and guard length (distance between motor and pump hubs) and we will quote the appropriate guard.
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Contact Us at Any Time
Room 1904, Building 1, Zhongtang Tianan Digital City, No.89 Jinyuan Road, Zhongtang Town,Dongguan City, Guangdong Province, China.
