Key Features & Benefits: No Physical Connection BetweenMotor and Load No Lubrication Required Lowest Total Cost of Ownership Efficient Torque Transfer Accepts Misalignment Cushioned and Delay Start Torque Limiting to Protect Equipment Eliminates Vibration TransferBetween Motor and Load Permits Shock Loading Low Maintenance Simple Installation & Operation Increases Seal & Bearing Life Green Technology Ideal for Applications Subject to: Vibration Periodic Load Seizure Pulsating Loads Thermal Expansion Shock Loading Tight Space Constraints Fluid Coupling Problems MGD / MGTL MagnaGuardDelay &Torque Limiting Couplings 10 2,000 Hp Principle of Operation TheMagnaDrivefamilyofdisconnectedmagnetic couplings is available in four different styles, each providing unique motor to load torque transfer and protectionfeatures.Thesecouplingsarethe MagnaGuard Economizer (MGE, see specific brochure for more information),FixedGapCoupling(FGC,see specificbrochureformoreinformation),MagnaGuard Delay(MGD),andMagnaGuardTorqueLimiting (MGTL).Ingeneral,eachofthesecouplings transmitstorquefromthemotortotheloadusing thesameprinciplesofoperationwithNO PHYSICALCONNECTIONofthedrivershaftto load shaft. The main components of the magnetic coupling are a Magnet Rotor that is surrounded by a Conductor Rotor. 1) MagnetRotor A precision-machined aluminum Rotor that contains the powerful rare-earth magnets. The magnets are manufactured from a Neodymium-Iron-Boron (NdFeB) alloy with a half-life of more than 2,000 years. The Magnet Rotor is usually mounted to the load hub. 2) SteelConductor The Conductor Rotor assembly is fabricated of a steel housing with copper conductor rings attached to the inside surface facing the Magnet Rotor.The Conductor Rotor assembly is mounted to the motor shaft. 3)HubsandShrinkDiscsThecouplinghubsareattachedtothe motor and load shafts using high strength shrink discs.The shrink disc applies radial compression forces to fasten the hubs to the shafts.These forces are so high that no keyway or pins are required for installation. 1) Magnet Rotors 2) Steel & Copper Conductors 3) Hubs and Shrink Discs LikeallMagnaDrivecouplings,theMagnaGuardDelay(MGD)andTorque-Limiting(MGTL)couplings provide a cushioned start.However, both the MGD and MGTL provide extra cushioning by a momentary delay in full torque-transfer.Immediately upon start of the motor there is a large amount of slip between the ConductorRotorandtheMagnetRotor,sostartingshockiscushioned.Duringstart-up,whenslipis greatest, there is also a natural repulsive force between the magnets and the conductors.The MGD and MGTL couplings allow the Magnet Rotors to slide away, increasing the air-gap by an additional 1/8 (1/16 per side).In this position the starting torque is reduced, providing additional cushioning of starting shock.As theMagnetRotoracceleratesandapproachesmotorspeed,therepulsiveforcesarereduced,andthe Magnet Rotors shift to their normal full-torque position. The Magnet Rotor and Conductor Rotor are NEVER IN CONTACT with each other.Torque is transmitted through an air gap in the coupling by the relative motion between the Conductor Rotor and extremely powerful permanentmagnetscontainedintheMagnetRotor.Thisrelativemotioncreatesamagneticfieldinthe Conductor that forms a very strong flux field with the magnets thereby transmitting torque across the space between the Magnet Rotor and Conductor Rotor components. InadditiontotheConductorRotorandMagnetRotor,theMGDand MGTLcouplingshavetwohubsthatareconnectedtothemotorand load shafts with a unique locking mechanism called a shrink disc.The shrink disc is a compression fitting that grips the shaft with tremendous compression forces.No keyways or pins are required. MGD MGTL During a load seizure, the high differential speed (slip) between the magnet and Conductor Rotors causes the high repulsive force to be re-instated.This allows the MGD to shift to its lower-torque position, and the load is partially disengaged.Thisprovidesadditionalmechanicalcushioningofaload seizure.TheMGDcanbeinstalledinhorizontalorverticalpositions,and can operate in forward or reverse direction of rotation. TheMGTLoperatesliketheMGD,butwiththeadditionalabilityto completely disconnect the load from the motor in the event of a load seizure or other over-torque condition.Upon start-up, the Magnet Rotors shift to a reduced-torqueposition,liketheMGDcoupling.IntheMGTL,flippers controlthisaxialshift.Atnormalrunningspeed,centrifugalforcecauses these flippers to pivot out of the way.The Magnet Rotors remain in their full-torqueposition.Duringaload-seizure,therepulsiveforcecausesthe Magnet Rotors to move more than 1 away from the conductors, because the flippersarenolongerlimitingtherotorshift.Withsuchalargeair-gap, torquetransferisminimalandtheloadiscompletelydisengagedfromthe motor.The MGTL can operate in this condition indefinitely without damage.StoppingthemotorallowstheMagnetRotorstoresetandtheflippers to return to the starting position.The load must be cleared before restarting theequipment.Otherthanstoppingthemotorandclearingtheload,the MGTLrequiresnooperatorintervention.TheMGTLisforhorizontal installations only, and cannot accommodate reverse rotation applications. MGD (MagnaGuard Delay) Coupling MGTL (MagnaGuard Torque Limiting) Coupling Conveyor Belts, Bucket Elevators & Other Bulk Handling Equipment Pumps Compressors Centrifuges Fans, Blowers Chippers, Shredders Pulpers, Re-Pulpers Crushers, Hammermills Mixers Typical Industries Mining & Cement Power Generation Oil & Gas Chemical Processing Pulp & Paper HVAC Water & Wastewater Irrigation Maritime General Manufacturing And many more Typical Applications MagnaDriveCouplingsprovideadisconnected,CushionedStart.Becausethemotordoesnothavetoovercomeloadinertia,the PeakDemandCurrentanddurationofInrusharereduced significantly.This Cushioned Start results in energy savings (see Graph)andreducedequipmentwear.Formanyapplicationsa lowerPeakDemandCurrentmaycontributetolowerelectrical powerrates.Also,theCouplingairgapcanbeadjustedduring installationtooperateapump,fanorbloweratlessthan maximumflow,withsizableenergysavingsbasedonthe centrifugal Affinity Laws. Technical Data * These dimensions may vary per application Conductor Side Assembly WidthAWeight Distance to CG (at min. shaft engagement) WR2 (inch)(inch)(inch)(lb)(inch)(lbf*inch^2) MGD 12/2011.756.211.85372.41615 14/3014.506.211.85552.711,340 14/4014.506.211.85552.711,340 14/5014.506.211.85552.711,340 16/6016.506.211.85712.872,280 16/7516.506.211.85712.872,280 16/10016.387.092.23793.302,510 16/12516.387.092.23793.302,510 16/15016.387.092.23793.302,510 16/20016.387.092.23793.302,510 18/25018.507.092.231013.484,070 18/30018.507.092.231013.484,070 20/35022.137.262.881753.5310,160 20/40022.137.262.881753.5310,160 22/45024.137.262.882033.6514,120 22/50024.137.262.882033.6514,120 22/60024.137.262.882033.6514,120 24/70027.808.143.982994.0827,320 24/100027.808.143.982994.0827,320 MGTL 14/4014.507.841.85563.381,390 14/5014.507.841.85563.381,390 16/6016.507.841.85723.562,350 16/7516.507.841.85723.562,350 16/10016.389.222.23814.122,590 16/12516.389.222.23814.122,590 16/15016.389.222.23814.122,590 16/20016.389.222.23814.122,590 18/25018.509.222.231024.344,170 18/30018.509.222.231024.344,170 20/35022.139.392.881804.3710,620 20/40022.139.392.881804.3710,620 22/45024.139.392.882074.5214,640 22/50024.139.392.882074.5214,640 22/60024.139.392.882074.5214,640 24/70027.8010.763.983025.0227,950 24/100027.8010.763.983025.0227,950 Model Magnet Side AssemblyCoupling Weight Distance to CG (at min. shaft engagement) WR2 DBSE (at min. shaft engagement) Coupling OAL* Angular Misalignment Capacity (Limit) Coupling Internal Radial Clearance (for Parallel Shaft MAL) Peak Torque (at min. Air-gap) (lb)(inch)(lb*inch^2)(inch)(inch)(degrees)(inch)(inch*lb) 392.554206.8610.051.460.161,250 532.818806.8610.051.750.252,240 582.869706.8610.051.170.253,130 602.881,0106.8610.051.170.253,580 743.001,7906.8610.050.990.194,380 783.021,9206.8610.050.990.195,470 973.792,2308.8212.020.990.136,580 1033.842,3908.8212.020.990.138,780 1093.892,5508.8212.020.990.1311,000 1153.932,7008.8212.020.990.1313,200 1323.724,3108.4311.630.870.1918,400 1383.744,5308.4311.630.870.1921,100 2053.467,5408.6412.780.760.1325,100 2113.497,8508.6412.780.760.1328,200 2323.5510,4208.6412.780.700.1331,600 2383.5710,8208.6412.780.700.1335,200 2443.5811,2208.6412.780.700.1338,700 3934.0725,80010.1415.600.580.2567,600 4194.1128,09010.1415.600.580.2587,000 593.539708.4911.681.170.253,130 613.551,0208.4911.681.170.253,580 753.691,8008.4911.680.990.194,380 793.731,9308.4911.680.990.195,470 994.642,24010.9414.140.990.136,580 1054.702,40010.9414.140.990.138,780 1114.762,56010.9414.140.990.1311,000 1174.812,71010.9414.140.990.1313,200 1354.644,33010.5513.750.870.1918,400 1414.674,55010.5513.750.870.1921,100 2184.387,68010.7614.900.760.1325,100 2244.407,99010.7614.900.760.1328,200 2454.4810,57010.7614.900.700.1331,600 2514.4910,96010.7614.900.700.1335,200 2574.5111,36010.7614.900.700.1338,700 4145.2226,17012.7618.220.580.2567,600 4405.2728,45012.7618.220.580.2587,000 Total Cost of Ownership (TCO) Fluid Couplings Rigid Couplings Disk Couplings MGD/MGTL Direct CoupledYesYesYesNo First CostHighLowMediumMedium Total Cost of Ownership HighHighHighLow Environmental Issues Oil leak /contamination and oil disposal problems Uses greasena None.Completely clean / Green technology Installation Issues Usually very heavy and bulky equipment requiring extra labor and time to install as well as setting-up oil levels Time spent with alignment Time spent with alignment Easy to install Space RequirementsHighLowLow Less than Fluid Couplings Easy to retrofit into existing Fluid Coupling Installations Alignment Issues Needs periodic laser alignment Needs periodic laser alignment Needs periodiclaser alignment None Overload Torque Protection Some, but likely will melt / blow off fusible plug ejecting oil NoNoYes Cushioned / Delayed StartModerateNoNoYes Conveyor Delay Start Feature Difficult to control Belt Uplift and prone to overtorque / oil spill NoNo Minimizes Belt Uplift and overtorque during startup System / Maintenance Requirements Medium Requires spare parts and oil High Requires spare parts High Requires spare parts Low Equipment Life Issues Vibration transfer causes lower equipment life Vibration transfer causes lower equipment life Vibration transfer causes lower equipment life MagnaDrive offers the longest life on bearings, seals, and other equipment MagnaDrives Greendisconnected torque-transfer technology reduces your total cost of ownership by lowering maintenance and operating costs, increasing process availability, and improving system reliability. Sample Installations MGD 20/400, 300HP, 1800RPM, Mining, Gear Box in Bulk Conveyor System, AZ, USA MGD 18/250, 150HP, 1500RPM, Iron Mill, Australia MGTL 18/250, 240HP, 1800RPM, Mining, Conveyor System, UT, USA MGTL 12/20, Power Generation, Conveyor System, TX, USA MGD 16/125, 55HP, 1480RPM, Mining, Bulk Material Handling Conveyor System, Australia MGD 18/250, 150HP, 1500RPM, Steel Mill, Conveyor System, Australia MagnaDrive Corporation 600 108th Avenue NE, Suite 1014, Bellevue, Washington 98004 Tel. (425) 463-4700 Fax (425) 463-4747 info@magnadrive.com / www.magnadrive.com MagnaDrive is a trademark of MagnaDrive Corporation. MagnaDrive Corp. All rights reserved. MGD / MGTL Sample Installations About MagnaDrive MagnaDriveCorporationwasfoundedin1999,andisbasedoutofBellevue,WA.Thecompanys breakthroughmagnetictechnologyprovidesacosteffectivesolutiontoincreasereliabilityandlower maintenance expense while achieving energy savings and process control. The impact and potential of the technologywasrecognizedbyIndustryWeekmagazine,whichselectedMagnaDriveasTechnologyofthe Year in 2001. MagnaDrive was selected by Inc. Magazine as one of the 500 fastest growing private companies intheUnitedStates.Recently,DeloittenamedMagnaDriveoneofthe100fastestgrowingtechnology companies in North America. MagnaDrive offers a family of products to accomplish a broad range of operating objectives:Reliability,SpeedControl,TorqueManagement,CushionedStart,VibrationControland Misalignment Tolerance. MGD 20/400, 250HP, 1500 RPM, Conveyor System, Mining, Botswana MGD 24/700, 700HP, 1800RPM, Pulp & Paper, Pulper Drum Application, WA, USA MGD 14/40, 40HP, 1800RPM, Airport Conveyor System TN, USA