Bearing Cross Reference and Interchange Lookup Tool

Enter a bearing part number

Works with any of SKF, FAG, NSK, NTN, or Koyo designations.

How this works

Standard deep-groove ball bearings (60xx, 62xx, 63xx) are built to ISO 15 boundary dimensions, and the base number (e.g. 6205) is shared across every major manufacturer. Each maker uses its own suffix for the same seal/shield feature — this tool parses your input into a base number and closure type, then shows the equivalent designation from the other four brands, plus the bore diameter (derived from the standardized bore-code arithmetic: the last two digits of the base number, ×5 mm, with codes 00/01/02/03 meaning 10/12/15/17 mm).

For the full explanation and a closure-code reference table, see our bearing interchange guide.

Closure suffix equivalence

The base number is shared across manufacturers; only the suffix that denotes the seal or shield changes. These are the published equivalents:

Shown for 6205 as the worked example; the same suffix rule applies to every base number in the 60xx, 62xx and 63xx series. Clearance suffixes (C3, C4) and cage codes are not interchangeable and must be matched separately.

Common deep groove ball bearing cross reference

For every size below, the base designation is identical across SKF, FAG, NSK, NTN and Koyo — they are all built to the same ISO 15 boundary dimensions. Bore is fixed by the designation itself.

60xx is the light series, 62xx medium, 63xx heavy — same bore, increasing outside diameter and load rating. Need a size outside this list, or a bearing that is not deep-groove? Email orderdesk@kkmsolutions.com and we will cross-reference it to exact manufacturer specification.

How to read a deep groove bearing designation

A designation such as 6205-2RS1 has two parts that matter for interchange. The four digits are the base number: the first pair (60, 62 or 63) is the series, and the last two digits are the bore code. The text after them is the suffix, and for the closures this tool covers it only tells you whether the bearing is open, sealed or shielded.

The bore comes from the last two digits

Codes 00, 01, 02 and 03 mean 10, 12, 15 and 17 mm. From 04 upward the bore is the code multiplied by 5 mm. That is why 6205 is a 25 mm bore in every brand's catalogue, and why the tool can state the bore for any valid input without a lookup table (this page lists 33 common sizes across the 60xx, 62xx and 63xx series above).

The suffix is where the brands differ

Every brand builds to the same ISO 15 boundary dimensions, so the base number is shared, but each writes its seal or shield code differently. For example a sealed 6205 is written 6205-2RS1 by SKF and FAG 6205-2RSR, NSK 6205DDU, NTN 6205LLU, Koyo 6205-2RS. The lookup strips spaces, upper-cases what you type, and matches it against the closure forms of all five brands, so you can start from any of them.

What the lookup does not tell you

• Clearance class (C3, C4) and cage material codes are separate specifications. They are not interchangeable and the tool does not parse them, so a designation carrying one may return no match.
• Specialty and sealed-for-life variants, other closure types, and bearings outside the 60xx, 62xx and 63xx deep groove series are out of scope.
• Outside diameter and width are not shown: they depend on series and bore, and this page prints only values that follow from the designation itself.

Before you order a substitute

Match the closure, the clearance class and the cage against the datasheet of the bearing you are replacing, and check the application (speed, temperature, lubricant) rather than the designation alone. If the part is worn, unmarked or obsolete, send the number, or a photo of the bearing, to orderdesk@kkmsolutions.com and the order desk will confirm the equivalent before you commit. The bearing interchange guide covers the reasoning in more depth, and the bearing selector helps when you know the dimensions (bore, outer diameter, width) rather than a designation.

Frequently asked questions

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