6205 Bearing Dimensions, Specifications & Cross Reference

Koyo/JTEKT 6205 and Timken open 6205 records give 25 × 52 × 15 mm. The NTN catalogue row for 6205 confirms that envelope. FAG Generation C documentation identifies 6205-C, also 25 × 52 × 15 mm; retain the C design suffix rather than treating it as the generic 6205 marking.

The FAG source is TPI 165, issued May 2017; current-edition confirmation remains pending. NTN catalogue evidence likewise requires exact variant and current-product confirmation. Dimension evidence does not establish identical ratings, closures, clearance or application suitability.

NACHI America catalogue NAB0401-4, September 2015, records 6205 with 25 × 52 × 15 mm boundary dimensions. Its table also lists 6205ZE/ZZE shields and 6205-2NSE contact / 6205-2NKE non-contact sealed variants. Source checked 12 October 2026; current-edition confirmation remains pending. These dated catalogue dimensions do not confirm replacement suitability. SNR product data was not substituted for the NTN-labelled entry.

Source: NSK 6205 online catalogue, checked 12 October 2026. NSK’s lubrication-specific speeds and SKF’s reference/limiting speeds are different catalogue measures. Do not rank replacement suitability by comparing these numbers alone.

A 6205 base number identifies a size family. Closure and clearance suffixes describe additional features that must be checked separately.

• Open: no integral closure. The SKF and NSK open 6205 records cited here have a 25 × 52 × 15 mm envelope.
• Shielded: NSK uses Z/ZZ; SKF uses Z/2Z for shields on one/both sides. Confirm the exact product rather than translating suffixes automatically.
• Sealed: a generic 2RS label is insufficient to identify seal contact, friction or speed. SKF distinguishes low-friction RSL and contact RSH seals; NSK has several seal families, including DDU and VV.

Closure choice changes protection and operating behaviour. Use the maker’s data for the exact variant; the open-bearing speed figures on this page do not establish a sealed-bearing limit.

Sources: SKF seal design explanation, SKF electric motor handbook and NSK 6205 product record. Read the seal and shield guide for further context.

1. Record the full marking, including closure, clearance and other suffixes; consult the equipment parts list when markings are incomplete.
2. Confirm bore, outside diameter and width. A same-bore bearing can have a different housing diameter or width.
3. Compare the exact maker’s load ratings, speed definitions, lubrication, tolerances and other specified features.
4. Check the intended shaft/housing fits and operating conditions against the equipment and bearing manufacturer’s guidance.

Search Finder for 25 × 52 × 15 mm candidates. Finder matches dimensions; it does not approve a replacement. Compare the 6200 series dimension table or read bearing designation guidance.

CN is Normal radial internal clearance; C3 is greater than Normal. Clearance describes internal movement before mounting, separately from the bearing’s external size and closure.

Fits and the temperature difference between rings influence operating clearance. Select the specified clearance for the application, using the equipment maker’s requirements and bearing maker’s guidance. C3 is not an automatic upgrade, and an open-bearing record does not establish the correct clearance for your machine.

Source: SKF Bearing Handbook for Electric Motors. NSK lists CN for its sourced open 6205 record.

What size is a 6205 bearing?

The nominal boundary dimensions are 25 mm bore, 52 mm outside diameter and 15 mm width. SKF and NSK sources confirm this size for their open 6205 bearings.

Are SKF and NSK 6205 bearings identical?

Their sourced open 6205 records share boundary dimensions. Their load ratings and speed measures differ. Dimensional agreement does not confirm replacement suitability.

What do 2RS, ZZ and 2Z mean?

These labels commonly describe closures on both sides, but the exact seal or shield design depends on the manufacturer. Verify the full designation and its product data.

Does C3 change the 6205 bearing size?

C3 describes radial internal clearance greater than Normal. It does not change the nominal 25 × 52 × 15 mm boundary dimensions or specify a seal type.

Can I use 6205 instead of 6204, 6206 or 6305?

These are different sizes. A 6305 also has a 25 mm bore but a larger outside diameter and width. Compare all three dimensions and the equipment requirements.