Koyo is a Japanese bearing brand, and AIMS Industrial lists 117 active Koyo products across ball bearings, roller bearings, needle roller bearings, thrust bearings, cam and roller followers and trailer wheel bearing kits. If you are weighing up brands, our bearing brand comparison is a good place to start, and the bearing cross reference guide helps when you are matching a number from another brand.
What's in the range
| Type | Products | What the range includes |
|---|---|---|
| Deep groove ball bearings | 28 | 6000, 6200, 6300, 6800, 6900 and 16000 series, plus the 60/22 to 63/32 sizes. Open, metal shielded (ZZ), contact sealed (2RS) and non-contact sealed (2RU), with C3 and C4 clearance and snap ring (NR) versions. |
| Miniature ball bearings | 2 | 600 and 630 series, metal shielded. |
| Angular contact ball bearings | 2 | Single row, 30 degree contact angle (70 series) and 40 degree contact angle (72 and 73 series). |
| Self-aligning ball bearings | 7 | 1200, 1300, 2200 and 2300 series, in cylindrical bore and tapered bore (K), with one contact sealed (2RS) listing. |
| Cylindrical roller bearings | 18 | N, NU, NJ, NUP and NF types across the 200, 300, 2200, 2300 and 1000 series, plus R type. |
| Tapered roller bearings | 12 | Metric 30200, 30300, 32000, 32200, 32300, 32900, 33000, 33100 and 33200 series, a steep angle (DJR) 30300 series, a rubber sealed (RS) 32000 series, and single row inch series cone and cup. |
| Spherical roller bearings | 2 | 222 series with C3 clearance, in cylindrical bore and tapered bore (K). |
| Needle roller bearings | 12 | HK, HK RS and HK.2RS drawn cup, BK closed end, B series and BH full complement, NK, NKS, NA and NKJ machined types, WJ radial assemblies and JR inner rings. |
| Thrust needle roller assemblies and washers | 7 | AXK, AXK TN and NTA assemblies, with AS, TRA to TRD, WS.811 and GS.811 washers. |
| Combined needle and thrust bearings | 6 | NAXR and NAXK combined needle roller and thrust roller or thrust ball bearings, with and without dust cap. |
| Thrust ball and spherical thrust bearings | 5 | Single direction thrust ball bearings in the 51100, 51200, 51300 and 51400 series, and a 293 series spherical thrust roller bearing. |
| Roller clutch bearings | 2 | FCB metric and RCB inch series drawn cup roller clutch and bearing assemblies. |
| Cam followers and track rollers | 10 | Two stud-type cam followers (CRSB-40 and NUKR) and eight yoke-type track rollers (STO, NUTR, NA22, NATR and YCRS). |
| Trailer wheel bearing kits | 4 | TBK-FM, TBK-HM, TBK-HR and TBK-FR kits, each with seal, split pin and dust cap. |
Choosing a Koyo bearing
The best starting point is the number on the bearing you are replacing, or the shaft size, housing size and load for a new design. Match the full number rather than the series alone, because the seal or shield, clearance and bore type are part of what makes a bearing fit.
For deep groove bearings, a metal shield (ZZ) keeps dust out with little added friction, while a contact seal (2RS) gives the best protection against dust and moisture at the cost of some friction and speed. A non-contact seal (2RU) sits between the two. C3 clearance is looser than standard and is common where a bearing runs warm or has an interference fit. A tapered bore (K) bearing is mounted on a tapered shaft or an adapter sleeve. On cylindrical roller bearings, N, NU, NJ, NUP and NF describe the flange arrangement, which decides whether the bearing can locate the shaft axially.
Needle roller bearings suit tight radial space, and the thrust needle assemblies and washers do the same job axially. Cam followers and track rollers run on a cam or track, so check the stud or yoke style against how it mounts. See the deep groove ball bearing guide, needle roller bearing guide, thrust bearing guide and bearing maintenance guide for more.
Always check the data sheet. Confirm dimensions, clearance, seal type and load ratings against your application before you order.
Related ranges
Browse ball bearings, deep groove bearings, self-aligning bearings, angular contact bearings, cylindrical roller bearings, tapered roller bearings, spherical roller bearings, needle roller bearings, thrust bearings and washers and cam followers. To remove a stuck bearing see bearing pullers. The full range is under bearings. Other brands: SKF, NSK, NTN, NACHI and FYH.
Order from AIMS Industrial
Need help finding the right Koyo bearing? Call us on (02) 9773 0122, contact our team or request a quote. We have supplied Australian industry since 1988 and can help match a bearing from a part number or put a parts list together.
Koyo bearing FAQs
What Koyo bearings does AIMS list?
There are 117 active Koyo products. The largest groups are deep groove ball bearings (28), cylindrical roller bearings (18), needle roller bearings (12) and tapered roller bearings (12). The range also includes self-aligning and angular contact ball bearings, spherical roller bearings, thrust bearings, cam followers, track rollers and trailer wheel bearing kits.
What is the difference between 2RS, ZZ and 2RU on a Koyo bearing?
ZZ is a metal shield, 2RS is a contact seal and 2RU is a non-contact seal. A shield suits clean, higher speed duty, a contact seal gives the best protection from dust and moisture, and a non-contact seal sits in between. Match the choice to where the bearing will run.
What does C3 clearance mean?
C3 is a larger internal clearance than standard. It is often chosen where a bearing runs hotter than normal or is fitted with a tight interference fit. Check your application before changing clearance, and confirm it against the data sheet.
What is the difference between N, NU, NJ, NUP and NF cylindrical roller bearings?
The letters describe where the flanges are on the inner and outer rings. That decides whether the bearing can locate the shaft axially or lets it float, so match the type to how your shaft is supported.
What is the difference between a cam follower and a track roller?
Both run on a cam or track. The Koyo cam followers listed here are stud-type and mount with a stud, while the track rollers are yoke-type and mount over a pin or axle. Check the mounting style against your design.
Do you have trailer wheel bearing kits?
Yes. There are four Koyo kits, TBK-FM (Ford marine), TBK-HM (Holden marine), TBK-HR (Holden road) and TBK-FR (Ford road), each with seal, split pin and dust cap.
How do I match a Koyo bearing to another brand?
Start with the full bearing number and compare bore, outside diameter, width, seal type and clearance. Our bearing cross reference guide explains suffix codes across brands, or call us on (02) 9773 0122 and we will help.