Dongguan HydroBlue Co., Ltd.
| Torque | 62-6500 |
| Specification | According to the drawings |
| Type | Coupling Hub |
| Material 1 | Cast Iron, Wear-Resistant Cast Iron, Cast Steel |
| Mould | Investment Casting Mould, Sand Casting Mould |
| Material | Stainless Steel |
| Material 2 | Stainless Steel, Duplex Ss, Cast Alloy Steel |
| Pump Package | Carton and Wooden Cases |
| Material Standard | ASTM, ANSI, SAE, Uns, DIN, En, ISO, Toct |
| Certificate | ISO9001:2015, ISO14001:2004, API Specification Q1 |
| Structure | Flexible |
| Testing | Dynamic Balancing |
| Transport Package | Carton and Wooden Cases |
| Speed | 1000-5400 |
| Production Capacity | 10, 000 Tons Per Year |
| Types of Welding Parts | OEM/ODM |
| HS Code | 84139100 |
| Bore Diameter | 10-165 |
| Model NO. | Rexnord Coupling Hub |
| Origin | China |
View Detail Information
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Product Specification
| Torque | 62-6500 | Specification | According to the drawings |
| Type | Coupling Hub | Material 1 | Cast Iron, Wear-Resistant Cast Iron, Cast Steel |
| Mould | Investment Casting Mould, Sand Casting Mould | Material | Stainless Steel |
| Material 2 | Stainless Steel, Duplex Ss, Cast Alloy Steel | Pump Package | Carton and Wooden Cases |
| Material Standard | ASTM, ANSI, SAE, Uns, DIN, En, ISO, Toct | Certificate | ISO9001:2015, ISO14001:2004, API Specification Q1 |
| Structure | Flexible | Testing | Dynamic Balancing |
| Transport Package | Carton and Wooden Cases | Speed | 1000-5400 |
| Production Capacity | 10, 000 Tons Per Year | Types of Welding Parts | OEM/ODM |
| HS Code | 84139100 | Bore Diameter | 10-165 |
| Model NO. | Rexnord Coupling Hub | Origin | China |
| High Light | Flexible CNC machining coupling hub ，Stainless steel Rexnord coupling ，CNC machined coupling with warranty | ||
DONGGUAN HydroBlue CO.,LTD. is a technology-driven enterprise delivering integrated solutions in fluid machinery, fluid engineering, industrial automation, and variable frequency drive systems. Our team of 8 professionals specializes in fluid engineering, electrical engineering, and electronic engineering, bridging applied research and practical manufacturing. Close collaboration with Jiangsu University, Chinese Academy of Sciences, and Guangdong University of Technology keeps our capabilities at the leading edge in hydraulic development, specialty coating applications, and intelligent industrial drive technologies. Jiangsu University National Research Center of Pumps provides hub-to-shaft shrink fit stress analysis and fatigue life evaluation for REXNORD coupling hub applications in centrifugal and positive displacement pump drives; Chinese Academy of Sciences contributes advanced heat treatment process optimization for hub alloy steel case hardening and core toughness balance; Guangdong University of Technology supports automated hub bore CMM verification and keyway broaching quality control for precision hub manufacturing.
Provide your pump model and hub bore/keyway specifications — our team will assess compatibility and come back with a detailed technical proposal.
Our brand delivers complete technical solutions within the fluid machinery and engineering sectors. Through our range of specialized technologies and product brands, we equip our clients with high-level technical advisory, commercial support, and integrated product solutions — covering pumps, frequency converters, servo drives, PLC-HMI, industrial control cabinets, motors, mechanical seals and assemblies, couplings, gearboxes, and turnkey engineering services (overseas on-site 3D scanning reverse molding of pump replacement parts and equipment debugging by our engineers deployed overseas).
REXNORD Coupling Hub is the shaft-mounting component of a flexible or rigid shaft coupling that transmits torque between a pump shaft and the coupling's flex element, disc pack, or gear sleeve. The hub is the interface between the rotating machine shaft and the coupling assembly — one hub mounts on the pump shaft, the other on the motor or drive shaft, and they are joined by the coupling's flex element or gear engagement.
The coupling hub is a precision-machined component characterized by its bore diameter and keyway (for keyed shaft connections), or its tapered bore and split bushing (for quick-mount applications). The hub also features the engagement surface for the specific coupling type: grid hub slots for grid spring engagement, jaw coupling hub legs for spider element capture, disc pack bolt holes for diaphragm-style connections, or gear hub teeth for gear coupling engagement with a mating sleeve.
REXNORD coupling hubs are manufactured from forged steel, cast steel, or ductile iron, with hubs for corrosive service available in stainless steel. The hub bore is machined to H7 tolerance, the keyway to P9, and each hub is mill-balanced as a minimum standard, with dynamic balancing available for high-speed applications.
Our REXNORD replacement coupling hubs are manufactured to the original REXNORD hub dimensions, engagement profiles, and bore configurations. Hubs can be supplied with custom bore and keyway dimensions to match existing shaft sizes, eliminating on-site machining at installation.
|
Category |
Details |
|---|---|
|
Product |
Coupling Hub (Shaft Hub, Coupling Half) – REXNORD brand specification |
|
Application |
Grid, jaw, disc, gear couplings for pump, motor, and drive shafts |
|
Hub Type (by coupling) |
Grid hub (slot type), Jaw hub (spider leg type), Disc hub (bolt flange type), Gear hub (tooth type) |
|
Bore Type |
Straight bore + keyway, Tapered bore + split bushing, Splined bore |
|
Bore Tolerance |
H7 standard; custom tolerances available |
|
Bore Range |
10 mm to 250 mm standard; larger sizes through custom order |
|
Keyway Standard |
DIN 6885 metric, ANSI B17.1 inch; P9 tolerance |
|
Material |
Forged steel 1045 (standard), Alloy steel 4140, SS 304, SS 316, Ductile iron |
|
Surface Hardening |
Induction hardening on gear teeth (gear hub); through-hardened (alloy steel hubs) |
|
Balance Grade |
Mill-balanced (standard), G6.3, G2.5 dynamic balance |
|
Standards |
ISO 1940 (balance), AGMA 9000, API 610 (option) |
|
Inspection |
Bore CMM, Keyway gauge, Flange face runout, Hardness, Material cert, MPI (option) |
|
Certificate |
ISO9001:2015, ISO14001:2004 |
|
Delivery |
10–20 days after deposit; custom boring and keyway available |
|
Payment |
70% TT in advance, balance against copy of B/L |
|
Hub Type |
Coupling Series |
Engagement Feature |
Typical Service |
|---|---|---|---|
|
Grid hub |
Grid coupling (elastomeric) |
Radial slots around hub OD for spring grid |
General pump, slurry, high-torque, shock load |
|
Jaw hub |
Jaw coupling (elastomeric spider) |
Axial legs on hub face interlock with spider |
Light-duty, close-coupled, small centrifugal |
|
Disc hub |
Disc coupling (metallic flex) |
Bolt holes on flange for disc pack |
High-speed, precision, API, turbine-driven |
|
Gear hub |
Gear coupling (tooth engagement) |
Crowned gear teeth on OD engage mating sleeve |
Heavy-duty, large centrifugal, steel mill |
Company Details
Business Type:
Manufacturer,Trading Company
Year Established:
2006
Total Annual:
$10 Million-US$50 Million
Employee Number:
50~100
Ecer Certification：
Verified Supplier
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