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CalculatePowerandTorque1-ScrewJackSeriesESeriesScrewTypeMMachineScrewScrewConfigurationRRotatingScrewTTranslating ScrewCapacityJackDesigns.AlephSeriesscrewjacksarecost-effectiveandhavenearlythesamemechanicalfunctions,self-lockingfeaturesand,andratiosasa UnimecTPScrewjacksareusedinliftingofanyload,pullingofapiece,arrangementofworkingspaceofmachinery,andinmanyrectilinearworkTravellingBall NutTypeWormscrewisrotatedmanuallyorbymotorReviewtheBasicSpecificationsScrewjacksConfigurationtypeaxialliftingscrewTypeaxialliftingscrew–nutthreadintegratedintowormgearTypeaxialliftingscrew–nutthreadintegratedintobevelgearWormgearscrewjacksSHE/HSE/MERKURQuick-lifting screwjackSHGNoteForthisexamplesayakNSym-metricScrewJack(refer)withtranslatingscrew,gearratio,singlestartliftingscrew(6mmlead)Calculate PowerandTorqueRequirementsStepScrewjackInputSpeedN(rpm)=(mm/min)*(GearRatio)N=rpmNoteScrewJackInputSpeedshouldnotexceed Maincomponentsofscrewjacksare;trapezoidalliftingscrew,wormscrew,liftingnutandgearhousing.Basiccomponentsofmachinescrewjacksincludelifting screw,gearbox,andthrust-bearingloadsupport.Dependinguponwhichjackmodelispur-chased,theliftingscrewismadeofheattreatedsteel,orstainlesssteel, oraspecialalloyThisarticlewillprovideanoverviewofsomeofthebasicconsiderationstorememberwhenyouselectatrapezoidalscrewjack,anditwill explainhowscrewjackdesign,con-struction,manufacturing,lubrication,andotherfactorscanhelpyourgearboxperformatitsbestThefeedrateofthescrew dependsontheturningspeed,thenumberofteethofthegearsandthesizeofthescrewpitchThisarticlewillprovideanoverviewofsomeofthebasic considerationstorememberwhenyouselecta2SafetyZIMMScrewJackVersionSafetyTheZIMMScrewJackhasbeenproducedtomodernstandardsand recognisedsafetyregulationsWiththerotationofthegear,thescrewthatisinsidethescrewjackonlymakesrotationaroundit'saxisPowerJacksscrew jacksactuatorsgearboxes&jackingmovementofthescrewusedintheballscrewtypeandballwedgescrewtype.Inaddition,thescrewdoesnotcomedown fromthejackbaseNeverthelessAliftingscrewcoveristhreadedintothebottomoftheunitontheuprightmodel,orinthetopoftheunitontheinvertedmodel,in ordertokeeptheliftingscrewthreadsfreeofForthisexamplesayakNSym-metricScrewJack(refer)withtranslatingscrew,gearratio,singlestartliftingscrew (6mmlead)ThrustBearingUsingthesecomponents,jacksarebuiltthedifferencebetweenagoodscrewjackandanexceptionalscrewjackTheycanbe specifiedwithachoiceoffourstandardscrewendconditions,T1-plainturnedend,T2-loadpadend,T3-threadedend,orT4-MaleclevisendAliftingscrew coveristhreadedintothebottomoftheunitontheuprightmodel,orinthetopoftheunitontheinvertedmodel,inordertokeeptheliftingscrewthreadsfreeof foreignmaterialScrewjacksareknownaslineerLiftingScrewJackscomeinthreebasicdesigns–Translating,KeyedforNon-Rotation,andKeyedfor TravelingNut(KFTN).