Right bearing.
Proven. Running.
Select, verify and troubleshoot bearings for motors, pumps, gearboxes, fans and compressors, in minutes, on any phone or laptop.
NEWBearing Autopsy: upload a photo of a failed bearing, get the likely causes →No card needed. Browse every tool without signing up. Bearing Cross-Reference is free without limit. Other premium tools include 2 free uses each.
Upload a photo of a failed bearing. Get the likely causes in about 20 seconds.
Bearing Autopsy reads the damage in your photo and ranks the possible causes, using 23 damage profiles and 96 reference photographs. Then it asks about your application and condition monitoring data to narrow the list.
- 1Take a photoUse your phone. The raceway, bore, rolling elements or cage. Up to 4 photos.
- 2AI reads the damageFlaking, pitting, heat tint, wear bands. It only describes what is visible. It does not guess.
- 3Causes are rankedYour evidence goes through the same open rules as the Diagnose tool, so each answer shows which clues point to which damage mode.
- 4Narrow it downAnswer questions on load, lubrication, environment and vibration data. The ranking updates as you go.
One reading = one case, with up to 4 photos analysed together. 1 free reading, then 2 readings a day with any licence. Credit is used per reading, never per photo. Rolling bearings. A preliminary guide, not a final diagnosis.
Your photo- Flaking and small craters where metal has broken away
- Damage sits in one part of the ring, the load zone
- Surrounding track looks otherwise smooth
Every tool on this page. Open any one.
Each section below is one tab of the tool: what it does, a real screen, and a button that opens it. Browse freely. We only ask for your name and email when you start using a premium tool, and each one except Cross-Reference includes 2 free uses.
Find the right bearing for your application in 15 questions
Tell it the machine, load, speed, temperature and environment. It recommends a bearing type and size and explains the designation in plain language.
Verify a bearing: life, safety factor and fits against your real duty
Already have a part number? Check calculated life, static safety factor and fits against the load and speed it really runs at, before you order or after a failure.
- Check life and safety factor for your load and speed
- See the numbers behind every answer
- Move straight on to the Load Calculator if you do not know the load
Basic rating life L10 only. The full tool adds lubrication, contamination and reliability effects.
Calculate bearing loads for 19 types of equipment, plus full worked templates
Work out radial and axial loads for belt drives, pumps, fans, crane hoists and more, with every step of the working shown. New, with a licence: Worked templates take a whole machine arrangement, such as an overhung fan with its coupling or belt drive, and give the load on both bearings, the thrust and the life of each. Then carry the result into Verify.
Bearing cross-reference across 7 brands
Type a full designation and see equivalents from SKF, FAG, NSK, NTN, Timken, Koyo and NRB, with load and life figures side by side. Free, with no sign-up and no credits.
- Look up equivalents for a designation
- Compare load and life figures side by side
- Find a distributor for the one you choose
Bearing failure analysis: read the damage and find the root cause
Match what you see on a failed bearing to 23 damage profiles backed by 164 real photographs, read the raceway path, map the causes and follow real field cases.
- Bearing Autopsy: upload a photo and get the likely causes
- Diagnose by ticking what you can see
- Browse the damage atlas: 23 profiles, 164 photographs
- Read the path: 13 raceway path patterns
- Use the cause map to see what to rule out
- Troubleshoot by symptom: heat, noise, vibration, play, stiffness
- Read 11 field cases from real plants (licence)
Condition monitoring: catch a bearing fault before it becomes a failure
A five-step learning path from the basics of vibration to bearing envelope analysis and reliability-centred maintenance, with redrawn charts, worked examples and a searchable topic library.
- Signals: amplitude, frequency, phase and which sensor to use
- Measure: intervals, levels and alarm bands that people act on
- Diagnose: unbalance, misalignment, looseness, gears and resonance
- Bearings: envelope analysis, defect frequencies and shock pulse
- Strategy: RCM, oil analysis and where your plant sits
Equipment anatomy: where the bearings sit and how they fail
See how bearings are arranged inside motors, pumps, fans and gearboxes, which one locates the shaft, which one floats, and where each tends to fail.
Bearing lubrication: grease, oil, intervals and oil life
Choose a grease or an oil, work out how much and how often, read an oil cleanliness code, and see how much longer oil can last when you fix the reasons it dies.
Bearing FAQ: 67 plain-language answers
Short, clear answers on life, clearance, fits, preload, grease, speed and failure terms. Type a question or a number and get the answer without opening a handbook.
Find an authorised bearing distributor in India
Locate distributors by brand and city, with India listings today. Use it after you have chosen the bearing.
Community and expert help
Software cannot answer everything. When a case does not fit a checklist, talk to people.
Rotec AI Community
A live WhatsApp community for mechanical and maintenance engineers. Post a real failure with a photo, ask for a second opinion on a selection, or share a fix that worked.
Join on WhatsApp →Ask an expert
Stuck on a selection or a failure? Message us on WhatsApp and a person will reply. Please confirm critical selections with your bearing supplier.
Message on WhatsApp →Field cases: from the damage to the root cause, with the numbers
11 cases from heavy industry: root-cause failure investigations, plus condition-monitoring cases on gearboxes, mills, pumps and slew bearings. One case is free to read in full as a sample; the rest are part of the paid licence.
Oil+air system fully "OK", yet the bearings kept failing
A restricted oil line starved the bearing even though the system showed correct settings.
🔒 Unlock with a licenceA cracked bearing ring, but the bearing was only the victim
A fan bearing cracked its inner ring, but the vibration pattern showed the fan blades were rubbing once per revolution.
Read the full case →A hot-box detector said all clear, then the axle broke
A freight wagon passed a hot-box detector without an alarm and derailed 35 km later, after an overhaul fitted a spacer that was far too short.
🔒 Unlock with a licenceInsulated bearings, yet they lasted only one or two months
Both bearings were insulated, and the roller bearing still wore out in weeks. The lab found current craters; a ground cable had been left off after a repair.
🔒 Unlock with a licenceA brick-factory mill bearing worn out in a year and a half
The radial clearance had grown from about 0.3 mm to 0.9 mm. Clay was getting into the bearing and grinding it away.
🔒 Unlock with a licenceA five-year bearing failed in two after an overhaul
Heavy abrasive wear and vibration marks pointed to poor lubrication and a vibration source. The cause was the crusher bottoming out.
🔒 Unlock with a licenceCement mill gearbox: gear wear found five months before the teardown
Cement dust in the oil damaged the bearings, then the gears. The spectra showed it months before the gearbox came out.
🔒 Unlock with a licenceBall mill pinion bearing: nine months of warning that vibration missed
Standard vibration on the neighbouring bearing showed nothing until replacement day. An impact-based measurement flagged the outer-race fault months earlier.
🔒 Unlock with a licencePumps away from their best efficiency point: wasted power, wrecked seals
Most pumps rarely run where they should. Straying from the best efficiency point drives cavitation, seal and bearing damage, and a large power bill.
🔒 Unlock with a licenceStacker-reclaimer slew bearing: protecting a R15 million per hour machine
At 10,000 tonnes an hour one bearing can stop the whole reclaim chain, and a replacement takes 9 to 14 months. Low-speed monitoring buys the time.
🔒 Unlock with a licenceThis case is part of the paid licence. Your licence key unlocks all 11 cases and every other premium tool. One case, the fan blade rub, is free to read as a sample.
See plans and buy a licenceI already have a licence keyAsk on WhatsAppReference you can read before you decide
Guides, calculators and answers that sit beside the tool. Everything here is also reachable from the Search button at the top of every page.
Free calculators
11 calculators for bearing life, loads, grease, oil and more. Open any of them without signing up.
Open →Find a bearing
Type a designation or a size and see its dimensions, load rating and equivalents.
Open →Failure modes
23 damage types: what they look like, why they happen and how to stop them coming back.
Open →Field cases
Real root-cause investigations and condition-monitoring cases, from a cracked ring to a ball mill bearing.
Open →Lubrication guides
Greases, oil systems, cleanliness, and how to make oil last longer.
Open →Quick answers
Plain-language answers on life, fits, speed limits and clearances. Type a question.
Open →Shaft alignment guide
Nine chapters: soft foot, shims and bolts, couplings, procedure, tolerances and thermal growth, with original diagrams.
Read →From question to answer in three steps
Tell it the duty
Answer a few plain questions about the machine, or type a bearing number you already have.
Get the answer with its working
See the recommendation or check, with the numbers behind it so an engineer can verify them.
Act on it
Take it to your supplier, save the position, or follow the fix and lubrication advice.
Honest about what it knows
- Every result shows its working, so an engineer can check the numbers.
- Checked against independent sources and calculations, with the knowledge verified against core engineering practice.
- Honest about limits. Approximations are flagged in plain words, such as "worth a second look before you commit".
- Runs in your browser: phone, tablet or laptop, nothing to install.
Service or supply company?
Package Rotec AI with your own offering: co-branding, bundles and team licences for distributors, repair shops and OEM service teams.
Talk to us on WhatsAppStart free. Pay only when it earns its keep.
Free
- Bearing Selector
- FAQ and quick checks
- Bearing Cross-Reference, unlimited
- Lubrication guides and knowledge library
- 1 field case, in full
- Find a Distributor
- 2 free uses on each other premium tool
Individual
- All premium tools unlocked
- For one engineer's own use
- Cancel any time
Enterprise
- One shared licence key for your whole team
- Invoice with GST, bundling and in-house knowledge base use
- Call or WhatsApp +91-8600026873
Partner with Rotec AI: India, USA, Europe and the Middle East
Rotec AI is a SaaS tool that puts bearing and associated component engineering selection, verification and failure analysis at every engineer's fingertips. We are looking for distribution and business partners to take it to plants, workshops and design offices across the world.
Who we are looking for
Bearing and industrial-component distributors, MRO suppliers, reliability and lubrication service firms, condition-monitoring companies, training providers, consultants and regional agents with plant and OEM relationships.
Why it sells
A working product, not a brochure: selector, life and load calculators, cross-reference, failure analysis with AI photo reading, equipment anatomy and lubrication, in one browser tool. Engineers can try it free with nothing to install.
Where
India, the United States, Europe and the Middle East first. Open to partners elsewhere who can reach engineers who select and troubleshoot bearings.
What partners get
A growing SaaS product to put in front of your customers, demo support from us, and terms agreed case by case. Tell us your market and we will shape the model with you.
Quick answers
Is Rotec AI free?
The Bearing Selector, Bearing Cross-Reference, FAQ and Find a Distributor are free. Each other premium tool includes 2 free uses, and after that a paid licence is needed.
Do I need to sign up?
No. You can browse every tab without signing up. We ask for your name and email only when you start using a premium tool.
Does it replace manufacturer data or an engineer?
No. Rotec AI supports engineering judgement. Please confirm critical selections with your bearing supplier.
Which bearing brands does the cross-reference cover?
SKF, FAG, NSK, NTN, Timken, Koyo and NRB.
Does it work on a phone?
Yes. It runs in any modern browser on a phone, tablet or laptop, with nothing to install.
How do I get a licence?
Subscribe in the tool through Razorpay. Your licence key is sent by email or WhatsApp, usually within 24 hours, and you can cancel any time.
Talk to a person, or try it on your next bearing
Questions about a selection, a failure or a team licence? Call or message us. Or open the tool and start with the free Bearing Selector.