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Machinery Company Engineering Notes

Koyo / JTEKT bearing notes for reference checks, gearbox repair and clean purchase lists.

Machinery Company is an authorized Koyo / JTEKT bearing supplier serving gearbox rebuilders, maintenance teams and OEM buyers worldwide. These articles cover how to read full Koyo suffixes, how to label drive-end and non-drive-end positions, and how to order bearings and mounting parts on one list.

  • Suffix & configurationSeal type, clearance, execution
  • Gearbox positionsFloating vs. locating, DE vs. NDE
  • Complete assembliesBearings, sleeves, housings
Tapered roller bearings laid out beside an opened industrial gearbox on a workshop bench

Gearbox rebuild references

Tapered, cylindrical, spherical and needle roller bearings

Latest Koyo bearing articles

Practical guides on identifying Koyo / JTEKT references, replacing gearbox bearings and preparing purchase lists that arrive complete.

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Close-up of a used roller bearing outer ring held in a technician's gloved hand

Still unsure of the exact Koyo reference?

Send a clear photo of the bearing markings with the equipment model and bearing position. We confirm the full suffix, configuration and assembly parts before quoting, and any technical change needs your approval.

Send your Koyo bearing list

Machinery Company supplies genuine Koyo / JTEKT bearings for gearboxes, drive shafts and general machinery to buyers worldwide. Share your references and we reply with a written quote.