Series X Flexible Couplings - Benzlers

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General Information- Inch/Metric conversions may not be direct conversions.SERIES XGENERAL INFORMATIONREFERENCE NOTES- Our standards apply unless otherwise specified.- All Dimensions are for reference only and are subject to change without notice unless certified.- Unless otherwise specified, our coupling hubs will be bored for CLEARANCE FIT with a setscrew OVER the keyway orINTERFERENCE FIT without a setscrew.- Torque ratings of couplings utilising Taper-Lock bushings can differ from those that do not. Refer to our Applica tionEngineers for details.- If we are to supply coupling hubs bored for Taper-Lock bushings, the bushing manufacturer MUST be noted on the order.- Consult our Application Engineers when limited end float is required. -Refer to our Application Engineers for bore limitationson hubs requiring Puller Bolt holes.Reference Notes† Peak torque capacity is two times the published rating. Consult our Application Engineers for higher speeds.• Maximum bores are reduced for hubs furnished with an INTERFERENCE FIT and a setscrew OVER the keyway.Recommended key sizes for the listed maximum bores are shown in each of the coupling type sec tions.∆ Minimum bore is the smallest bore to which a RSB hub (rough stock bore) hub can be bored. Depending upon couplingsize, rough stock bore hubs may have only a blind centering hole or a through hole that will permit re-machining of thehubs to the minimum bores specified.◊Sizes 5R - 50R Nylon cover furnished as standard and Epoxy coated steel cover available upon request. For Sizes 60R -80R Epoxy coated steel cover is standard (Nylon cover not available).Cover fasteners are ISO 7380 Socket Button Head Capscrews. Two cover fasteners per coupling.To obtain total weight: Basic Coupling + BE times kg per mm of BE.To obtain total WR 2 : Basic Coupling + BE times WR 2 per mm of BE.Values shown are based on no angular misalignment. The axial centering force restricts motor end float and satisfiesthe requirements of NEMA standards MG1 -14.37, 1-20.81 and 1-21.81.§ Interpolate for intermediate speeds. Maximum BE is based on 70% of critical speed. Refer to our Application Engineersfor higher running speeds.Long Term Grease (LTG)The high centrifugal forces encountered in couplings separate the base oil and thickener of general purpose greases. Heavythickener, which has no lubrication qualities, accumulates in the tooth mesh area of gear couplings resulting in prematuremesh failure unless periodic lubrication cycles are maintained. Long Term Grease (LTG) was developed specifically forcouplings. It resists separation of the oil and thickener and is an extreme pressure grease. Although LTG grease is compatiblewith most other coupling greases, the mixing of greases may dilute the ben efits of LTG.Benefits include: increased coupling life, significantly extended re-lubrication intervals, reduced maintenance costs, reduceddowntime, superior lubrication, high load carrying capabilities and it is usable up to 121 o C (250 o F).4
SERIES XSELECTION PROCEDUREStandard Selection MethodThe standard selection method can be used for mostmotor, turbine, or engine driven applications. The followinginformation is required to select a gear coupling.• Kilowatt (kW) or torque (Nm).• Running rpm.• Application or type of equipment to be connected(motor to pump, drive to conveyor, etc.).• Shaft diameters.• Shaft gaps.• Physical space limitations.• Special bore or finish information and type of fit.Exceptions are High Peak Loads and Brake Applications.For these conditions, use the Formula Selection Methodin the next column, or consult one of our ApplicationEngineers for assistance.1. RATING: Determine system torque. If torque is notgiven, calculate as shown below.System Torque (Nm) = kW x 9549rpmWhere: kW (Kilowatt) is the actual or transmittedpower required by the application (if unknown, usethe motor or turbine nameplate rating) and rpm is theactual speed the coupling is rotating. Applications thatrequire rapid changes in direction or torque reversalsshould be referred to our Application Engineers.1. SERVICE FACTOR: Determine the appropriateservice factor from Table 1, Page 6.2. REQUIRED MINIMUM COUPLING RATING:Determine the required minimum coupling ratingas shown below Minimum Coupling Rating = S.F.(Service Factor) x Torque (Nm)3. SIZE: Turn to appropriate pages for the coupling typechosen and trace down the torque column to a valuethat is equal or greater than that determined in Step 3above. The coupling size is shown in the first column.4. CHECK: Check speed (rpm), bore, gap anddimensions.Formula Selection MethodThe Standard Selection Method can be used for mostcoupling selections. The procedure below should be usedfor:• High Peak Loads• Brake Applications (where the disc brake orbrakewheel is to be an integral part of the coupling,consult our Application Engineers for design options).Providing system peak torque and frequency, duty cycle, andbrake torque rating will allow for a more refined selectionusing the Formula Selection Method.1. HIGH PEAK LOADS: Use one of the followingformulas for applications using motors with torquecharacteristics that are higher than normal;applications with intermittent operations, shockloading, inertia effects due to starting and stoppingand or system induced repetitive high peak torques.System Peak Torque is the maximum torque that canexist in the system.Select a coupling with a torque rating equal to orgreater than selection torque calculated below.A. NON-REVERSING HIGH PEAK TORQUESelection Torque (Nm) = System Peak TorqueorSelection Torque (Nm) = System Peak kW x 9549rpmB. REVERSING HIGH PEAK TORQUESelection Torque (Nm) = 1.5 x System Peak TorqueorSelection Torque (Nm) = 1.5 x Peak kW x 9549rpmC. OCCASIONAL PEAK TORQUES (Non-Reversing)If a system peak torque occurs less than 1000 timesduring the expected coupling life, use the followingformula:Selection Torque (Nm) = .5 x System Peak TorqueorSelection Torque (Nm) = .5 x Peak kW x 9549rpmFor reversing service, select per Step B, above.2. BRAKE APPLICATIONS: If the torque rating of thebrake exceeds the motor torque, use the brake ratingas follows:Selection Torque (Nm) = Brake Torque Rating x S.F.5
Page 2 and 3: PRODUCTS IN THE RANGEServing an ent
Page 8 and 9: Table 1 - Coupling Service Factors
Page 10 and 11: SERIES XNOTES8
Page 12 and 13: SERIES XGEAR COUPLINGSGear Coupling
Page 14 and 15: SERIES XUNIT DESIGNATIONSDriving Hu
Page 16 and 17: Type GC02 Continuous SleeveFloating
Page 18 and 19: Type G52 Standard Flanged SleeveSin
Page 20 and 21: Type G52 Standard Flanged SleeveSin
Page 22 and 23: Type G82 Standard Flanged SleeveRig
Page 24 and 25: Type G20 Steel Mill Flanged SleeveD
Page 26: Type G52 Steel Mill Flanged SleeveF
Page 29 and 30: Type GF Standard Flanged SleeveMill
Page 31 and 32: SERIES XENGINEERING DATATable 12 -
Page 33 and 34: SERIES XGRIDGRIDDouble flexing stee
Page 35 and 36: SERIES XGENERAL DESCRIPTIONGrid Cou
Page 37 and 38: Type T10Close-Coupled Coupling / Di
Page 39 and 40: Type T31 Continuous SleeveFull Spac
Page 41 and 42: Type T35Floating Shaft / Dimensions
Page 43 and 44: SERIES XDIMENSIONS ANDSPECIFICATION
Page 45 and 46: SERIES XENGINEERING DATACoupling Mi
Page 47 and 48: SERIES XCONE RINGCONE RINGPin and b
Page 49 and 50: SERIES XUNIT DESIGNATIONSDriving Hu
Page 51 and 52: Type 613Cone Ring Heavy Duty Taper
Page 53 and 54: SERIES XENGINEERING DATACoupling Mi
Page 55 and 56:
SERIES XNYLICONNYLICONGear coupling
Page 57 and 58:
SERIES XUNIT DESIGNATIONSDriving Hu
Page 59 and 60:
SERIES XENGINEERING DATATable 33 -
Page 61 and 62:
SERIES XCOUPLING APPLICATIONDATA SH
Page 63 and 64:
CONTACT USAUSTRALIADENMARKSWEDEN &
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Series X Flexible Couplings - Benzlers

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