Koyo Bearings
Koyo is the bearing brand of JTEKT Corporation, a Japanese precision engineering company formed through the merger of Koyo Seiko and Toyota Machine Works. As part of the Toyota Group, JTEKT brings automotive-grade manufacturing standards to its industrial bearing products — the same quality systems and steel processing that supply major vehicle manufacturers are applied to Koyo's industrial range. Boundary dimensions follow ISO 15, ISO 355 and AS 2729 across the catalogue.
Browse Koyo at AIMS by type:
- Ball bearings — 6000, 6200, 6300 series, open/shielded/sealed, C3 clearance
- Needle roller bearings — HK shell type, NK/TAF machined type, cam followers
- Tapered roller bearings — 30000 series, metric
- Thrust bearings — 51100 ball thrust, AXK needle thrust + washers
- Angular contact bearings — combined load applications
- Self-aligning bearings — misalignment-tolerant shafts
Koyo Bearing Range at AIMS Industrial
AIMS Industrial stocks 117 Koyo bearings covering a broad cross-section of types. Deep groove ball bearings span the 6000, 6200 and 6300 series in open, metal-shielded and rubber-sealed configurations, with C3 clearance options throughout. Angular contact ball bearings are available for combined load applications. Miniature ball bearings suit instrumentation and small motor applications.
Koyo needle roller bearings include shell type (HK) in standard and heavy-duty configurations, and machined type (NK, TAF) with and without inner rings. Cam followers are stocked for track roller and follower applications. Thrust needle roller bearings (AXK series) and thrust washers complete the compact thrust bearing options. Tapered roller bearings cover the 30000 series. Thrust ball bearings (51100 series) and self-aligning ball bearings are also available.
Why Koyo
Koyo bearings offer consistent quality across a wide product range — a practical advantage when sourcing multiple bearing types from a single reliable manufacturer. Their broad catalogue coverage reduces the need to switch between suppliers and simplifies stock management for maintenance teams. As part of JTEKT, Koyo benefits from in-house steel formulation and heat treatment that delivers consistent hardness and dimensional accuracy across production batches.
Bearing Selection & Maintenance
If you're replacing an existing bearing and need to confirm the equivalent, our bearing cross-reference guide covers the standard codes used across Koyo, NTN, NSK, SKF, NACHI and others. For installation, alignment and failure diagnosis, see the bearing maintenance guide. Common type-specific guides: deep groove ball bearings, needle roller bearings and thrust bearings. When you need to pull a stuck bearing, our bearing puller guide walks through the options.
Need help selecting the right Koyo bearing for your application? Call (02) 9773 0122 or contact our team.
Available in Australia and New Zealand
This range ships across Australia from our Milperra (Sydney) warehouse — typically 1-3 business days for in-stock items. New Zealand customers: contact our team for freight quote — typically 5-7 business days via air freight to Auckland, Wellington and Christchurch. Trade and B2B accounts available on application both sides of the Tasman.
People Also Ask — Koyo Bearings
Q: What is Koyo and who owns the brand?
Koyo is one of Japan's premier bearing manufacturers — now part of JTEKT Corporation (formed from the 2006 merger of Koyo Seiko and Toyoda Machine Works). The Koyo brand continues with its established product lines and quality reputation. Strong heritage in automotive bearings (OEM supply to Toyota, Honda, Nissan and others) and industrial bearings. In Australia, Koyo bearings are widely used in automotive workshops, agricultural equipment service, and general industrial maintenance.
Q: Koyo bearings — what range does AIMS stock?
Browse [/collections/koyo](/collections/koyo) for current Koyo stock — covers deep groove ball bearings (6000, 6200, 6300, 6800, 6900 series), angular contact, taper roller, needle roller, agricultural bearings (PHU/PFU agricultural sealed series), wheel hub bearings, and specialty bearings. AIMS keeps the high-volume sizes in immediate stock; less-common sizes available on order. For automotive replacement work, Koyo is the OEM brand for many vehicles.
Q: Koyo vs other Japanese bearings — same quality?
Yes — Koyo, NSK, NACHI, and NTN all manufacture to similar premium standards. Pricing and availability vary, but quality and rated bearing life are broadly equivalent. Choice often comes down to: which brand the OEM specified, what AIMS has in stock, and customer preference. Don't pay a brand premium for one over the others without specific reason — for replacement work, match the brand stamped on the failed bearing where possible, but cross-brand replacement is standard practice.
Q: What's the difference between sealed (2RS) and shielded (ZZ) Koyo bearings?
ZZ (metal shield): non-contact seal, lower friction, better for high-speed clean environments. Allows minor dust/water ingress over time. 2RS (rubber contact seal): full contact seal, prevents dust and water ingress, slightly higher friction, lower max speed. For wheel hubs, agricultural, and outdoor equipment: 2RS. For electric motors, fans, and clean workshop equipment: ZZ. Match the seal type to the operating environment.
Q: How do I cross-reference a Koyo bearing number?
Koyo follows the ISO bearing-number standard — the dimensions and ratings are largely interchangeable with NSK, NACHI, SKF, NTN, and other major brands of the same bearing type and bore size. Use the [Bearing Cross-Reference Guide](/blogs/product-guides/bearing-cross-reference-guide) for number decoding and brand cross-matching. For specialty Koyo numbers (PHU agricultural, J-series wheel hubs), check the catalogue or contact AIMS — we'll identify the bearing and recommend stock equivalents.