Koyo / JTEKT bearings by application: farm, construction & industrial machinery
KOYO Bearing Supplier supplies Koyo / JTEKT bearings for repair work on agricultural machinery, construction equipment, power transmission and industrial equipment, with every replacement reference checked against your machine and bearing position.
Planters, harvesters, sprayers and combine harvesters use bearings in wheel hubs, gearboxes, header drives, threshing rotors and seeding units. These bearings run in dust,…
Excavators, wheel loaders and other earthmoving equipment depend on bearings in wheel ends, final drives, swing and travel mechanisms, and heavy-duty shafts. These positions…
Construction Machinery Bearings · Wheel Bearings · Wheel Hub Bearing Units · Spherical Roller Bearings
Axles, gearboxes, reducers and compact drive mechanisms use tapered, cylindrical and needle roller bearings to carry combined loads and keep shafts in position. Gear…
Gearbox and Reducer Bearings · Tapered Roller Bearings · Needle Roller Bearings · Automotive Bearings and Parts
Industrial and mobile equipment uses bearings in drive trains, auxiliary machinery and rotating parts such as electric motors, pumps, compressors, fans, machine tool spindles,…
Ball Bearings · Deep Groove Ball Bearings · Electric Motor Bearings · Pump and Compressor Bearings
Distributors of farm and construction machinery parts keep stock of Koyo / JTEKT bearings to serve workshops, dealers and fleet customers. Their orders mix…
Bearings by Industry · Special Bearings · Roller Bearings · Ball Bearings
Bearing position decides the bearing type: tapered roller bearings carry axles and wheel ends, spherical roller bearings carry heavy shafts, and needle roller bearings fit compact drives. Use this table as a first selection reference; the final Koyo / JTEKT reference is confirmed for your machine.
Bearing position
Typical equipment
Common bearing types
Axles
Tractors, harvesters, wheeled construction equipment
Tapered roller bearings
Wheel ends
Excavators, wheel loaders
Tapered roller bearings (cone and cup)
Gearboxes
Farm and construction machinery transmissions
Tapered roller · Cylindrical roller bearings
Compact drives
Space-limited transmission mechanisms
Needle roller bearings
Heavy-duty shafts
Heavier machinery, combine harvesters
Spherical roller bearings
Auxiliary rotating parts
Auxiliary machinery, planter and sprayer drives
Deep groove ball bearings
Specified positions
Positions with a defined load or axial requirement
Angular contact · Thrust ball bearings
Sizing alone is not enough: the same dimensions can carry different internal designs and sealing for mobile equipment.
In peak season, the right bearing the first time is what keeps machines working.
Checking the reference against the machine and quoting every bearing in the assembly together prevents the wrong part arriving and a second breakdown for a missed bearing.
When a header drive or wheel bearing fails mid-season, the marking is often worn and only the machine model is known. We work back from the machine and bearing position to the Koyo / JTEKT reference.
Reference checked against machine model and part identification
Sealing confirmed for dusty field conditions
All bearings for a combine or gearbox rebuild on one quote
Construction season: excavators and wheel loaders
Wheel-end and axle bearings are critical wear parts on fleet equipment. Mixed lists from several job sites and machines are put together on one enquiry, so the whole fleet's requirement is quoted at once.
Wheel-end tapered roller bearings with matching cones and cups
Complete assembly lists, so no mating part is missed
Workshops, fleets and distributors each send a different kind of enquiry.
KOYO Bearing Supplier serves equipment buyers worldwide, including the USA, Peru, the Netherlands, Argentina, Egypt and Poland. Here is what a typical enquiry looks like for each buyer.
Agricultural service workshops
Technicians send the machine model, the bearing position and photos of the marking, measured dimensions and the assembly.
Construction fleet operators
Fleet parts buyers send the Koyo / JTEKT reference and quantity per excavator or wheel loader, and confirm both before ordering.
Distributors & maintenance contractors
Buyers send one mixed list covering several machines or job sites, plus the destination country, postcode and required arrival date.
From the field
Buyers who have run these repairs in season.
Our agricultural equipment service shop uses Koyo bearings for planters, harvesters and sprayers. This supplier provides the correct tapered, spherical and cylindrical roller bearings for each machine type, and the parts arrive in time for our busy season.
Jesse Thompson
We run a construction equipment fleet. Koyo bearings on our excavator and wheel loader wheel ends are a critical wear item. The bearings we ordered arrived with the correct rollers and cups, and our mechanic noted the fit was exactly as expected.
Pedro Alvarez
When a Koyo bearing failed on a harvest machine during the season, we needed a replacement urgently. The supplier identified the correct Koyo reference, shipped same-day, and the machine was back in the field within the day. That is what emergency support looks like.
Lars Hansen
Supporting services
From machine details to a written quote and shipment.
Every application enquiry gets four things: the reference checked against your machine, the full assembly quoted together, a written quote with clear terms, and shipping documents agreed before dispatch.
01
Machine-based matching
Koyo / JTEKT references checked against the machine model, part identification and bearing position. Gaps are resolved before quoting.
02
Full assembly quoting
Quote one bearing position or every bearing a gearbox or axle rebuild needs, so mating parts are not missed.
03
Written quotation
Model, quantity, price and currency, stock status, estimated lead time, validity period and applicable freight or tax terms.
04
Shipping documents
Shipping method, dispatch timing and required shipping documents confirmed with you after the order is placed.
FAQ
Application bearing questions
Short answers to what workshops and fleet buyers ask most when the bearing marking is worn or the application needs confirming.
The bearing marking is worn and I only know the machine model. What should I send?
Send the machine model, the bearing position and photos of whatever marking remains, plus measured dimensions and a photo of the assembly. We use these together to identify the Koyo / JTEKT reference before quoting.
Can I attach the machine part number?
Yes. Machine part numbers, manual pages and repair parts lists are checked together with the Koyo / JTEKT reference. They are especially useful when a whole assembly is being rebuilt.
How is the right sealing confirmed for field or site conditions?
Sealing is confirmed from the application, not from size alone. Tell us the bearing position and working conditions, such as dusty fields, and send a photo of the existing bearing; the specification is settled before the quote.
Will you supply a substitute instead of the original reference?
Only with your approval. Before quoting we ask whether you accept a separately identified alternative, and any technical change is made only after you approve it.
Request a quote
Send your machine details and marking photos to get a written quote.
Include the equipment model, the Koyo / JTEKT reference if known, the bearing position, mating parts, quantity, destination country and postcode, and when you need the parts.
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Jesse Thompson 
Pedro Alvarez 
Lars Hansen