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Bearing Cross-Reference: SKF, NSK, FAG and TIMKEN Equivalents
Look up a bearing by part number or by envelope size. Every entry below is matched on ISO 15 and ISO 355 boundary dimensions — bore (d), outer diameter (D) and width (B/T) — so a listed replacement fits the same shaft and housing.
| AFUTAI model | Type | d (mm) | D (mm) | B / T (mm) | SKF | NSK | FAG | TIMKEN | Load rating |
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What this table does and does not claim
Dimensional equivalence is a published standard, not a brand claim. Bore, outer diameter and width for these sizes are fixed by ISO 15 (radial bearings) and ISO 355 (tapered roller bearings). Any manufacturer producing a 6205 must use a 25 mm bore, 52 mm outer diameter and 15 mm width.
- Matched: envelope dimensions, so the bearing mounts interchangeably.
- Not implied: cage material, internal clearance, precision grade, heat treatment, sealing or limiting speed — these differ between makers and between series.
- Safety-critical applications: confirm clearance, precision and load rating with our engineering team before substituting in aerospace, automotive safety systems, cranes or mining equipment.
Brand names are used solely to describe dimensional interchangeability. Ultrabearing is an independent manufacturer and is not affiliated with, authorised by, or endorsed by SKF, NSK, FAG or TIMKEN.
Frequently asked questions
Is the AFUTAI NJ204 interchangeable with the SKF NJ 204?
Yes — dimensionally. Both share the ISO 15 envelope of 20 mm bore, 47 mm outer diameter and 14 mm width, so they mount in the same housing. Cage material, clearance class and precision grade can differ and should be confirmed against your application.
What does 6205 mean in a bearing part number?
In the ISO designation system, 62 is the dimensional series and 05 is the bore code. Bore code 05 corresponds to 25 mm, so a 6205 bearing has a 25 mm bore, 52 mm outer diameter and 15 mm width.
How do I read a bearing size such as 25x52x15?
The three figures are bore (d), outer diameter (D) and width (B) in millimetres. 25x52x15 describes a bearing with a 25 mm bore, 52 mm outer diameter and 15 mm width — the same envelope as a 6205.
Can I substitute a tapered roller bearing for a deep groove ball bearing?
Only if the application allows it. The two types have different load directions and stiffness: tapered roller bearings carry combined radial and axial loads, deep groove ball bearings suit lighter combined loads at higher speed. Equal envelope dimensions do not imply equal performance.
Why are load ratings not listed for every model?
Basic dynamic and static load ratings are manufacturer-specific values produced by design calculation and type testing. We publish only values backed by our own engineering data, and supply them per enquiry. We do not reproduce third-party catalogue ratings as our own.
Need the load rating, clearance or a drawing?
Send the part number and application details. We confirm dimensions, load ratings, clearance class and lead time within 24 hours.
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