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Rotec AI — Bearing Selection Report

Generated:

Spec Plate— — —

Channel—

Sector—

Equipment—

Precision—

Radial load Fr—

Axial load Fa—

Speed—

Target life—

Min. bore—

Environment—

Op. temperature—

Motion—

Misalignment—

Which bearing—

Rotation—

Bearing family will appear here

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Preview mode

See how bearing verification works — activate a license to check your own designation and loads.

Verify a bearing you've already picked

For when you already know the designation from experience — a plant standard, a part you've replaced before — and just need a fast, real sanity check against the actual load and speed, not a full selection walkthrough. Enter what you know; leave the rest at the defaults if you're short on time.

Bearing designation

Which bearing

Radial load Fr (N)

Non-drive ends are often built as the non-locating bearing in a typical arrangement — designed to float axially and carry little to no thrust by design, since that job usually falls to the drive end instead. Worth double-checking this really does see axial load in your specific design, rather than assuming it does by default.

Axial load Fa (N)

Don't know these offhand? Open Load Calculator to work them out from your actual equipment type — your entries here stay put, so come back to this tab once you have the numbers. No shortcuts on this one — a guessed load is a wrong answer with better manners.

Speed (rpm)

Target life

Operating temp (°C)

Date this bearing was last changed

Hours of operation per day

Hours already in service
(= days since last change × hours/day — or type an exact figure directly)

Environment

Spec Plate— — —

Enter a designation to check it

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Preview mode

Browse every calculator below — activate a license to enter values and calculate.

Pick your equipment — grouped by how the load actually arises

Power transmission (motors, gearboxes, drives)

Fluid & process equipment

Heavy & rotating process equipment

Reciprocating machinery

Material handling

Mobile, rail & transport

Marine & renewable energy

Machine tools

Other

Transmitted power (kW)

Shaft speed (rpm)

Pulley / sprocket pitch diameter (mm)

Drive type

Transmitted power (kW)

Shaft speed (rpm)

Gear pitch diameter (mm)

Gear type

Pressure angle (°)

Helix angle (°)

Pitch cone angle (°)

Spiral angle (°)

Worm lead angle (°)

This gear's own helix angle (°)

Differential pressure across impeller (bar)

Impeller eye diameter (mm)

Shaft diameter through impeller (mm)

Rotor + impeller weight (kg)

Speed (rpm, optional)

Number of impeller vanes (optional)

Component weight (kg)

Additional axial force, if any (N)

Which one?

Line pull — cable tension (kN)

Total wrap angle around the sheave (°)

Cable parts on this drum

Total rotating weight — shell + charge (kg)

Support span, trunnion-to-trunnion (m)

Centre of gravity, distance from support 1 (m)

Sizing which support?

Transmitted power (kW)

Belt speed (m/s)

Wrap / lagging condition

Transmitted power (kW)

Screw speed (rpm)

Screw lead / pitch (mm)

Screw + material weight on this end bearing (kg)

Nip / line load (kN per metre of roll width)

Roll face width (mm)

Roll self-weight, if this bearing also carries it (kg)

Wire/felt tension (N per mm of width)

Wire/felt width (mm)

Roll self-weight (kg)

Motor/drive power (kW)

Shaft speed (rpm)

Impeller diameter (m)

Impeller/service type

Unbalanced (eccentric) mass (kg)

Eccentricity / throw radius (mm)

Operating speed (rpm)

Total vehicle/equipment weight (kg)

Share of weight on this axle (%)

Wheels on this axle end (each side)

Duty / surface condition

Propeller / propulsion thrust (kN)

Shaft + propeller weight at this bearing (kg)

Rated rotor thrust (kN)

Rotor + hub weight (kg)

Spindle power (kW)

Spindle speed (rpm)

Tool / workpiece diameter at cut (mm)

Operation

Not calculated here

Crushing force depends on the crusher type (jaw/cone/gyratory/impact), material hardness, eccentric throw, and the mechanism's own mechanical advantage — these vary enough between designs that a single generic formula would likely mislead rather than help. Get the bearing reaction loads from the crusher OEM's own published data or design calculation, then use "Manual entry" here to carry those numbers into the bearing selector.

Peak differential gas pressure across piston (bar)

Piston diameter (mm)

Reciprocating mass — piston + rod share (kg)

Crank radius (mm)

Connecting rod length (mm)

Crankshaft speed (rpm)

Bearing span L (mm)

Length between the 2 bearing positions.

Enter each real load on the shaft — its position (distance from DE; enter a negative number, or a number greater than the span, for a load overhung beyond one of the bearings), and its radial and/or axial magnitude. This calculates the real reaction at both DE and NDE from every load you enter (standard superposition on a simply-supported shaft) — the same physics used for the mill/trunnion calculator above, generalized to as many loads as your actual application has.

Motor shaft power (kW)

Speed (rpm)

Rotor (armature + shaft) mass (kg)

Rotor core diameter (mm)

Rotor core length (mm)

Shaft position

What is on the shaft end?

Belt type (factor f on the pull)

Gear quality and duty (fk × fd)

Pulley or pinion pitch diameter (mm)

Helix angle of pinion (°, 0 for spur)

Mass on the shaft end (pulley, pinion or half coupling) (kg)

Bearing span, centre to centre (mm)

Shaft end overhang beyond the drive-end bearing (mm)

Rotor centre from the non-drive-end bearing (mm, blank = midspan)

External axial thrust (N, from pump, gear helix or similar)

Bearing bore diameter d (mm)

Why are you preloading?

Rotor mass carried by the pair (kg, optional)

Shaft position

Radial load on the rotor bearing set (N)

Net axial gas load on the rotor (N)

Shaft speed (rpm)

Thrust bearing mean diameter dm = (d + D)/2 (mm)

Thrust arrangement

Tapered roller axial factor Y (from the bearing table)

Radial load Fr (N)

Axial load Fa (N)

Shaft support configuration

Which bearing are you sizing?

Where does the load act, relative to the two bearings?

Bearing span L (mm)

Overhang distance beyond this bearing (mm)

Sizing the DE and NDE bearings is normally two separate runs of this calculator — the load split between them depends on where the driven component sits, and each end can end up needing a different bearing size. Both reactions are shown below; use whichever matches the "which bearing" choice above.

How this works

Worked templates: complete calculations for a whole machine arrangement

Each template takes the machine geometry and loads, works out the reaction at both bearings, the thrust, and the life of each bearing, and shows every step. Pick one, enter the values for your machine, press Calculate. Included with a licence.

Worked templates are part of the licensed toolYou can browse the layout and see the example below. Entering your own values and the full results need a licence.

Saved bearing positions

This session only — closing or refreshing the page clears these. Save from the bottom of any completed result in the Bearing Selector tab.

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Preview mode

Explore how real machines are built: bearing arrangements, failure modes and OEM part numbers. Activate a license to open the machines.

Equipment anatomy

See inside the machine

Pick a machine to see how its bearings are arranged in a true cross-section: which bearing locks the shaft and which one floats, the part numbers used, how each one typically fails, and the seals, lubrication and housings around it.

Catalogue part-number lookupPublished OEM part numbers across 9 sectors: electric motors, tractors, paper machines, metals, mining, aerospace, food and beverage, pumps and railways.

IEC frame size

Tractor OEM

Model

Roll / position

Equipment / position

Bearing

Equipment / position

System / equipment

Turbine class

Housing type

Bore

Pump duty class

Class / size

FAQ and quick check

Check the basics in a minute

Type a bearing number, a question or a machine. You get the answer first, with a button to the full tool. Or pick a quick check below. Everything comes from this tool's own data, so it is instant and works offline. It is not a chatbot.

Quick checks

Fill in a few numbers, get an answer with a green, amber or red verdict

Look up a machine

Arrangement drawings, bearing numbers, failures and rules of thumb

Something is wrong

Pick what you notice

Learn the basics

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Preview mode

See how the cross-reference works — activate a license to look up your own designations.

Cross-reference by full designation

Type the whole number exactly as printed on the bearing, with its prefix and suffix letters. You get equivalent bearings at other makers, and every code in your number explained in plain words, so you know what must match before you swap.

1 · Who made it? (optional)

2 · Bearing number

Try:

Don't have a number? Browse by type and sizeSee which sizes exist and what each maker calls them.

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Preview mode

Browse how distributor search works — activate a license to search by your own city or pincode.

Find a distributor

Brand

City, state, or pincode

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Preview mode

You have used your 2 free damage reports. Activate a license to open every failure mode, diagnose and troubleshoot.

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Preview mode

You have used your 2 free lubrication uses. Activate a license to keep using the Lubrication tab.

Subscribe to Rotec AI

Unlocks Load Calculator, Equipment Anatomy, and Cross-Reference. After subscribing, you'll receive your license key by email or WhatsApp shortly afterward — activate it in the box at the top-right of this page.

Individual

For a single engineer's own use. ₹499/month or ₹4,990/year.

Enterprise

One shared license key for your whole team, with custom pricing, GST invoice and bundling options.

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Rotec AI Community

A real, live WhatsApp community for mechanical and maintenance engineers — post an actual failure with a photo, ask for a second opinion on a selection, or just see what other people in the field are running into this week. Not a substitute for the calculations in this tool — the place to compare notes with other engineers when a real-world case doesn't fit neatly into a spec sheet.

What it's for

Post a real failure — photos welcome — and ask what others think caused it
Get a second opinion on a bearing selection before you commit to an order
Share a lubrication insight or a fix that worked for you, for others to learn from
See what real engineers in other plants and sectors are actually running into

Ground rules

This is a public group — anything posted is visible to every member, so don't share anything commercially sensitive (customer names, contract pricing, proprietary drawings). Keep it engineering discussion, not a sales channel. Basic courtesy — this works best as a place people actually want to check.

👥 Join the Rotec AI Community on WhatsApp

This is a general template provided for convenience and has not been reviewed by a lawyer — please have it checked against your specific business and local regulatory requirements before relying on it.