6205-ZZ bearing: complete specifications & equivalents
The 6205-ZZ is a ISO 15 radial bearing sized 25 x 52 x 15 mm (bore x OD x width) with ZZ sealing. Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Bore diameter d | 25 mm |
| Outer diameter D | 52 mm |
| Width B | 15 mm |
| Material | GCr15 |
| Seal / shield | ZZ |
| Internal clearance | CN / C3 available |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 14.8 kN |
| Basic static load rating C0 | 7.8 kN |
| Fatigue load limit Pu | 0.335 kN |
| Reference speed (thermal) | 28000 rpm |
| Limiting speed (mechanical) | 14000 rpm |
| Operating temperature | -30 to +120 °C |
| Mass | 130 g |
| Manufacturer designation | SKF 6205-2Z |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018) |
| Last verified | 2026-09-24 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018)) · extracted 2026-09-24
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018)); SKF® and SKF Explorer® are trademarks of AB SKF, used here for identification only — mpnbase is not an authorized SKF distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at skf.com.
Dimensions in inches & 6200-series range
| Bore d | 0.984 in |
|---|---|
| Outer diameter D | 2.047 in |
| Width B | 0.591 in |
| ISO bore code | 05 |
| Radial section height (D−d)/2 | 13.5 mm |
| Smallest bore in 6200-series | 10 mm |
| Largest outer diameter in 6200-series | 400 mm |
| Width range across 6200-series | 9–65 mm |
| Bore position in 6200-series (smallest first) | 6 of 33 |
| Bore above smallest 6200-series size | 15 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 6205 | ISO 15 | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range. Brand-specific OEM equivalents pending multi-source data. |
Interchange levels: full standard interchange · partial verify parameters · verify manual confirmation required. Links resolve to the equivalent model's specification page where available.
How the 6205-ZZ model number is decoded
In the 6200-series (ISO 15 diameter series 2) the last two digits encode the bore: 6205 carries bore code 05 = 25 mm. Outside diameter 52 mm and width 15 mm come from the ISO 15 boundary-dimensions general plan. Suffix -ZZ denotes two non-contact metallic shields; they retain grease and block coarse debris but are not liquid-tight. For normal-load mounting with a rotating inner ring on a 25 mm shaft, typical catalogue practice is a k5 shaft seat with an H7 housing bore — verify against the actual load direction and magnitude. SKF's own suffix is 2Z (this page's industry-neutral spelling is -ZZ); catalogue number 6205-2Z.
Typical equipment & failure modes
Common applications
- centrifugal pumps
- small gearboxes
- conveyors and drives
- agricultural equipment
Known failure patterns
- fine-particle abrasion when non-contact shields let dust past in dirty duty
- grease aging in the shield-for-life cavity with no relubrication path
- brinelling from static overload or hammering during mounting
- false brinelling from vibration while the shaft is stationary
Selection pitfalls — read before you substitute
- At a 25 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 6205-ZZ; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.
- The 62xx light series is the default general-purpose section at 25 mm bore; before upgrading to a 6305 for extra capacity, confirm the housing accepts a 52 mm OD and 15 mm width — it is not a drop-in swap.
- ZZ shields are non-contact: 6205-ZZ blocks chips and coarse dust but is not waterproof — do not install it expecting a pressure-wash seal, step up to 6205-2RS for that.
- Shielded 6205-ZZ units are typically greased for life; prying the shields out for regreasing usually bends them and leaves a gap that throws grease in service.
- Deep-groove ball bearings tolerate only minutes of misalignment; if the 52 mm housing cannot be aligned, switch to a self-aligning type rather than shimming 6205-ZZ.
- SKF spells the shielded version 6205-2Z (one shield: 6205-Z), not "-ZZ": the suffix language differs by brand even though the ISO envelope is identical, so quote the brand designation when ordering.
- The single-shield execution 6205-Z is a distinct order number in catalogue 17000: it suits open gears or oil-bath arrangements where the unshielded face faces the lubricant, and it is not interchangeable with the double-shield 6205-2Z for high-contamination positions.
- The 14.8/7.8 kN ratings here are SKF Explorer-class figures from catalogue PUB BU/P1 17000/1 EN (Oct 2018); SKF can revise internal geometry and ratings without changing the designation, so treat the catalogue version and date as part of the specification and re-verify for critical drives.
Frequently asked questions
What are the dimensions of a 6205-ZZ bearing?
A 6205-ZZ deep-groove ball bearing has a 25 mm bore, 52 mm outer diameter and 15 mm width (0.984 × 2.047 × 0.591 in), per ISO 15 boundary dimensions. It is fitted with two non-contact metallic shields. Geometry-based estimated mass is about 125 g for a steel-cage unit; catalogue masses vary slightly with seal and cage design.
How does the 6205 bore code work?
The last two digits of 6205 are bore code 05, giving 05 × 5 = 25 mm bore. The 52 mm outside diameter and 15 mm width follow the ISO 15 diameter series, not the bore code alone.
What does the ZZ suffix on 6205-ZZ mean?
ZZ means two non-contact sheet-metal shields, one each side. They retain factory grease and block coarse particles with little friction, but do not seal against liquids, fine dust or pressure washing.
How does the 6200 compare with other series at the same 25 mm bore?
The '2' is the light diameter series: 52×15 mm with a 13.5 mm radial section at 25 mm bore. A 6305 on the same bore is larger and higher-rated; a 6005 is smaller and lower-rated.
What is the SKF designation and catalogue data for 6205-ZZ?
In the SKF Rolling Bearings catalogue this size is listed as 6205-2Z — two non-contact sheet-metal shields, 25×52×15 mm per ISO 15. Quoted values: C 14.8 kN, C0 7.8 kN, Pu 0.335 kN, limiting speed 14000 r/min, mass 130 g. Brand suffixes (2Z, 2RSH) differ from the industry-neutral spelling 6205-ZZ.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018) on 2026-09-24. Read our editorial & correction policy.