Rotec AI

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Bearing SelectorPick the right bearing, step by stepVerify a BearingLife, safety factor and fitsLoad CalculatorLoads from your machineWorked templatesFan, gear and shaft load templatesCross-ReferenceSame size from other makersBearing AutopsyNewUpload a photo, get the likely causesFailure AnalysisRead damage, find the causeLubricationGreases, oils, cleanliness, oil lifeEquipment AnatomyMotors, pumps, fans, gearboxesFAQ and quick checksSearch the basics in plain languageFind a DistributorSuppliers by brand and city

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Free calculatorsLife, grease, oil, loads and moreFind a bearingSize, rating and equivalents by designationFailure modesDamage types, causes and fixesKnowledge libraryLubrication and reliability articlesBearings by machineMotors, pumps, mills, kilns and moreHow-to guidesBearing life, grease, failures, numbersField casesFailure investigations and monitoring cases (licence)Lubrication guidesGreases, oil systems, oil life and costQuick answersPlain-language answers to common questions

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Equipment anatomy

Bearings by machine

Know your application: where the bearings sit, how each one is loaded, how they fail and how to lubricate them, for 17 types of machine.

See every bearing position with sizes and reasons

Drives and rotating machines

MachineWhere the bearings are
Electric motorsIEC induction motors, ball and roller bearings, VFD protection
Centrifugal pumpsEnd-suction, API process and vertical pumps
Fans and blowersPillow-block fans and overhung impellers
Industrial gearboxesHelical and spur reducers, tapered and cylindrical roller bearings
Screw compressorsOil-flooded rotary screw air compressors
Industrial centrifugal fans: clean-air and material-handlingDirect-drive and belt-driven fans, P and T impellers, overhung loads

Material handling and process

MachineWhere the bearings are
Belt conveyorsDrive and tail pulleys, carrying idlers
Vibrating screensExciter shafts with rotating unbalance
Paper machine rollsPress, felt, suction and dryer rolls
Food and beverage linesWashdown conveyors, stainless housed units

Rail and mobile equipment

MachineWhere the bearings are
Railway axleboxesSealed double row tapered roller units on axle journals
Tractors and agricultural machineryWheel hubs, transmissions, PTO

Cement and minerals processing

MachineWhere the bearings are
Mill pinion and counter shaftSpur or helical pinion on a counter shaft, driven through a coupling, meshing with the mill girth gear
Vertical roller millsGrinding roller, main drive and separator bearings
Rotary kilnsSupport roller bearings, tyres, girth gear and pinion
Ball millsTrunnion supports, pinion bearings, girth gear drive
Gyratory crushers and apron feedersPinion, eccentric, spider and step bearings