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Koyo / JTEKT bearings for gearboxes, drive shafts and general machinery.

Machinery Company supplies Koyo and JTEKT tapered, cylindrical, needle, ball and spherical roller bearings to gearbox builders, repair shops and machine assemblers worldwide. Quote by part number, equipment model or a full assembly list.

Send Your Part List Match a Bearing Position
  • Koyo + JTEKTOld marks or current numbers
  • Needle to sphericalSmall and heavy-duty sizes
  • Whole-unit kitsOne itemised quote per assembly
Koyo tapered roller, cylindrical roller and needle roller bearings laid out on a steel workbench beside a gearbox shaft

Select by bearing position

Start from the load and the space, then pick the bearing family.

The fastest way to find the right Koyo / JTEKT bearing family is to describe what the position has to carry and how much room it has. Combined loads point to tapered rollers, tight radial space to needle rollers, heavy shafts to spherical rollers. Use the table below to narrow the family before checking exact dimensions.

Load or installation feature Bearing family Typical position
Radial and axial load acting together Tapered roller bearings Gearbox shafts, combined-load seats
High radial load on gear and shaft systems Cylindrical roller bearings Industrial gears and shafting
Limited radial installation space Needle roller bearings Compact seats where bore size alone is not enough
Heavy-duty shaft under demanding load Spherical roller bearings Heavy industrial shafts, conveyor gearboxes
Specified locating arrangement Angular contact ball bearings Defined locating positions
Auxiliary drive, general-purpose duty Deep groove ball bearings Auxiliary drives, general machinery
Axial load positions Thrust ball bearings Thrust positions in machinery
Non-standard or application-specific seat Application-specific bearings Supplied against drawings or equipment records

Position known, dimensions in doubt? Send the shaft position and gearbox model and we match the family and size together.

Bearing families

Browse Koyo / JTEKT bearings by category

Machinery Company groups its range into 35 product categories, from tapered and cylindrical roller bearings to ball and needle types. Open a category to see the models currently listed.

View All Products
Roller Bearings from Koyo and JTEKT 01 Roller Bearings 99 models View Roller Bearings Ball Bearings from Koyo and JTEKT 02 Ball Bearings 83 models View Ball Bearings Special Bearings from Koyo and JTEKT 03 Special Bearings 47 models View Special Bearings Bearings by Industry from Koyo and JTEKT 04 Bearings by Industry 27 models View Bearings by Industry Automotive Bearings and Parts from Koyo and JTEKT 05 Automotive Bearings and Parts 6 models View Automotive Bearings and Parts Super-Precision Bearings from Koyo and JTEKT 06 Super-Precision Bearings 1 model View Super-Precision Bearings

Listed models

Koyo / JTEKT bearing models ready to quote

187 bearing models are listed online. Every listing can be quoted on its own or added to a whole-gearbox request.

View All Bearing Models
Engineer holding a large worn roller bearing next to an open industrial gearbox housing

Application-specific bearings

No catalogue number? Quote from the drawing or the equipment record.

Bearings for special positions are supplied against your drawing number or the equipment's maintenance record. Send what the original build used and we work back to the matching Koyo / JTEKT bearing.

  • Drawing number
  • Equipment model
  • Shaft position
Send Your Drawing

Two ways to buy

Buy one part number, or the whole unit's bearing set.

Order single references when you know exactly what failed; send a full assembly list when a gearbox or machine is being rebuilt or built new.

Single tapered roller bearing held in a gloved hand in a maintenance workshop

Buy by Part Number

Best for maintenance teams and repair shops replacing a known bearing: quote it on the old Koyo mark or the current JTEKT number.

  • Koyo and JTEKT references accepted side by side
  • Prototype quantities or production volumes
  • Planned replacement and maintenance stock
Disassembled industrial gearbox on a bench with its shafts and bearings laid out in order

Whole-Unit Kit Purchasing

Best for gearbox overhauls and machine assembly: send every bearing in the unit as one itemised list and get one quote back.

  • Lines grouped by shaft position
  • Per-unit quantity and order total kept separate
  • No missed or doubled bearings on rebuild day

Size range

From compact needle rollers to large roller bearings.

One supplier covers the tight seats and the heavy shafts in the same machine. Small-section needle and ball bearings sit on the same quote as large tapered and spherical roller bearings.

  1. 01 · Smallest section

    Needle roller

    Seats with limited radial space

  2. 02

    Deep groove ball

    Auxiliary drives, general machinery

  3. 03

    Angular contact ball

    Specified locating arrangements

  4. 04

    Thrust ball

    Axial-load positions

  5. 05

    Cylindrical roller

    Industrial gears and shafting

  6. 06

    Tapered roller

    Gearboxes, combined radial and axial loads

  7. 07 · Heaviest duty

    Spherical roller

    Heavy industrial shafts, conveyor gearboxes

Incomplete or worn markings

A blurred marking is still a starting point.

If the reference on an old bearing is incomplete, a clear photo plus the known gaps is enough to begin. The part is identified and confirmed first, then quoted, so the wrong substitute never reaches your gearbox.

  1. 1

    Photograph the marking clearly

    Shoot the ring face and any stamped characters in good light. Add the gearbox model and shaft position if known.

  2. 2

    State what is still missing

    Note the gaps, such as a suffix, cage type or exact dimensions, so the identification work goes straight to them.

  3. 3

    Confirm, then quote

    The exact reference and assembly configuration are confirmed with you before a written quote is issued.

Every substitute needs your approval. Any alternative reference is listed separately on the quote and is never shipped as a silent swap. Technical changes go ahead only after the buyer signs off.

Close-up of a used roller bearing outer ring with a worn, partly legible stamped marking

Send a photo of a worn marking and get back the possible Koyo / JTEKT references, with the dimensions to check before anything is quoted.

Worn-marking identification

FAQ

Questions buyers ask about Koyo / JTEKT bearings

How should I submit old Koyo markings and current JTEKT numbers?

Send both on the same line if you have them. The old Koyo mark from the bill of materials and the JTEKT number from purchasing records are matched to one reference, so your BOM and your orders stay in step.

Can you quote per-unit quantity and order total together?

Yes. Each line shows the quantity used per unit and the total for the order, so a whole-gearbox list is neither short nor over-ordered.

Which bearing fits a seat with very little radial space?

Usually a needle roller bearing. Bore size alone is not enough to choose one, so include the shaft position and housing details and the full geometry is checked before quoting.

Do you supply bearings that are not listed online?

Yes. Application-specific bearings are supplied against a drawing number or equipment record, and the listed catalogue is only part of the Koyo / JTEKT range we source.

Request a quote

Send your part list for an itemised Koyo / JTEKT quote.

Machinery Company quotes single references and complete gearbox or machine bearing sets for buyers worldwide. The more you include, the faster the match.