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Rexnord Industries, LLC
Rexnord Addax Composite Cooling Tower Coupling Catalog

Rexnord Addax Composite Cooling Tower Coupling Catalog

Product catalog summary

Overview: The Rexnord® Addax® Composite Cooling Tower Coupling catalog provides comprehensive details on the features, benefits, and specifications of composite couplings designed for cooling tower applications.

Features and Benefits: These couplings are lightweight, corrosion-resistant, and have a high misalignment capacity, which simplifies installation, reduces maintenance, and extends service life. The composite material offers a high strength-to-weight ratio, reducing vibration and increasing the operating range.

Product Specifications: The couplings feature a flanged composite spacer and patented composite flexible elements. They are dynamically balanced to meet industry standards and come in various sizes with different torque ratings.

Service and Support: Rexnord provides global sales and customer service support, with a standard lead time of two weeks for made-to-order couplings and emergency expediting options for urgent needs.

Quality Assurance: The company uses Lean Manufacturing and Six Sigma methodologies to enhance product value. Certificates of material, balance, and conformity are available upon request.

Warranty: A one-year warranty is offered against defects in material or workmanship, with specific conditions for claims and exclusions.

Technical Data: Detailed tables include dimensions, weight, torque ratings, and other engineering specifications for various coupling models.

Specifications and Engineering Data: The document discusses weight and inertia calculations for drive shafts, the importance of Lateral Natural Frequency (LNF), and critical speed calculations using SelectC 2007 software.

Drive Shaft Vibration: Vibration issues, particularly those caused by Blade Pass Frequency (BPF), are addressed. It is recommended to design the shaft's natural frequency to be 8% away from the BPF to avoid overlap.

Safety Margins and Recommendations: The Cooling Technology Institute (CTI) recommends a 1.3 factor for critical speed over operating speed for steel shafts, while a 1.15 margin is adequate for composite shafts due to their lower mass and stability. Rexnord Addax shafts have been tested for minimal manufacturing variability.

Product Models and Specifications: Various models of composite couplings are listed with specifications, including spacer lengths and hub sizes, along with bolt-on backstop tabulation details.

Customer Service and Global Presence: Rexnord emphasizes its commitment to customer service and global presence, providing contact information for international offices and highlighting its dedication to quality and service.

Catalog excerpts

Rexnord Addax Composite Cooling Tower Coupling Catalog -1

Rexnord > Addax > ή Composite Cooling Tower Couplings Catalog >

Open the catalog to page 1

Rexnord Addax Composite Cooling Tower Coupling Catalog -2

Virtually every cooling tower coupling installation hasunique coupling dimension, therefore all Rexnord > Addax coupling assemblies are Γmade to order percustomer supplied dimensions. Even though eachRexnord > Ԯ ή Addax coupling is made to yourspecifications, Rexnord provides the absolute BESTstandard lead time in the cooling tower industry 2weeks after receipt of order. As an added benefit,Rexnord offers an exclusive emergency expeditingoption that includes: The Rexnord > ׮ Addax > Composite Cooling Tower Coupling delivers ΓBest-In-Class Value for the cooling towerindustry by providing excellent...

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Rexnord Addax Composite Cooling Tower Coupling Catalog -7

Lateral Natural Frequency (LNF) relates to beam stiffness and mass of the composite coupling. All beams have a natural frequency. The Rexnord > Addax > ή driveshaft is a long slenderbeam that has a LNF commonly referred to as critical speed. Critical speed of the shaft is calculated in SelectC 2007 andis supplied to our customers. Blade pass frequency (BPF) is the number of blades multiplied by the fan speed. Fan blades in a cooling tower induce a forcing frequency caused by pressure pulsations on adjacent components including the drive shaft. Blade pass vibration is caused by pressure pulsations...

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Rexnord Addax Composite Cooling Tower Coupling Catalog -8

DBSE SPACER LENGTH A B B D COMPOSITESPACER STANDARDHUBCOMPOSITEFLEXIBLE ELEMENT OVERSIZEDHUB C > DBSE SPACER LENGTH A B B STANDARDHUBCOMPOSITEFLEXIBLE ELEMENT OVERSIZEDHUB COMPOSITESPACER D C >

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Rexnord Addax Composite Cooling Tower Coupling Catalog -9

MODELMating Hub Backstop Bolting InformationODW (Ref)Pawl Diameter (Ref)CompressedSpeed (rpm Ref)B. C. DiameterHole DiameterTighteningTorqueCompressedSprung >

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Rexnord Addax Composite Cooling Tower Coupling Catalog -10

Rexnord > Addax > ή Cooling Tower Couplings > Cooling Tower Coupling Application Data Sheet Quote/Job Number:Customer:DBSE:Date:Location:Quantity: (Distance Between Shaft Ends is defined as the length measured between the face of the gear box input shaft and the face of themotor shaft to within 0.10 inches (ѱ2.5mm). Motor Data:HorsePower:RPM:NEMA or IEC Frame Size:Motor Shaft Diameter: Key Size:Two Speed?YesNoHigh Speed:Low Speed:Variable Speed:YesNoMax Speed:Min Speed:Gear Reducer Date:Reduction Ratio:Input Shaft Diameter:Key Size:Fan Data:Number of Blades:Fan RPM: MOTOR SHAFT ENDGEAR REDUCER...

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