6209-ZZ bearing: complete specifications & equivalents
The 6209-ZZ is a ISO 15 radial bearing sized 45 x 85 x 19 mm (bore x OD x width) with ZZ sealing. Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 45 mm |
| Outer diameter D | 85 mm |
| Width B | 19 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 | 35.1 kN |
| Basic static load rating C0 | 21.6 kN |
| Fatigue load limit Pu | 0.92 kN |
| Reference speed (thermal) | 17000 rpm |
| Limiting speed (mechanical) | 8500 rpm |
| Operating temperature | -30 to +120 °C |
| Mass | 430 g |
| Manufacturer designation | SKF 6209-2Z |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018) |
| Last verified | 2026-09-25 |
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 | 1.772 in |
|---|---|
| Outer diameter D | 3.346 in |
| Width B | 0.748 in |
| ISO bore code | 09 |
| Radial section height (D−d)/2 | 20 mm |
| Smallest bore in 6200-series | 3 mm |
| Largest outer diameter in 6200-series | 540 mm |
| Width range across 6200-series | 2.5–85 mm |
| Bore position in 6200-series (smallest first) | 18 of 45 |
| Bore above smallest 6200-series size | 42 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 6209 | 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 before substituting. |
| 6209-2RS-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 45×85×19 mm envelope per ISO 15; seal variant differs (ZZ vs 2RS) — confirm sealing suits the duty. |
| 6209-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 45×85×19 mm envelope per ISO 15; seal variant differs (ZZ vs OPEN) — confirm sealing suits the duty. |
| 6209-RSR | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 45×85×19 mm envelope per ISO 15; seal variant differs (ZZ vs RSR) — confirm sealing suits the duty. |
| 6209-ZZ-NSK | NSK | full Dimensions and internal design equivalent — standard interchange. | Identical ISO 15 envelope, seal and ratings band — standard interchange; re-verify precision class and clearance per supplier. |
| 6209-2RS-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 45×85×19 mm envelope per ISO 15; seal variant differs (ZZ vs 2RS) — confirm sealing suits the duty. |
| 6209-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 45×85×19 mm envelope per ISO 15; seal variant differs (ZZ vs OPEN) — confirm sealing suits the duty. |
| 6209-RSR-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 45×85×19 mm envelope per ISO 15; seal variant differs (ZZ vs RSR) — confirm sealing suits the duty. |
| 6209-ZZ-NTN | NTN | full Dimensions and internal design equivalent — standard interchange. | Identical ISO 15 envelope, seal and ratings band — standard interchange; re-verify precision class and clearance per supplier. |
| 7209 | SKF | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | — |
| NU209 | SKF | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | — |
| W6209-2RS | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF stainless execution W 6209-2RS1 shares the 45×85×19 mm envelope but rates differently (35.1/21.6 kN vs 28.1/20.4 kN) — not a load-rating equivalent. |
| W6209-ZZ | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF stainless execution W 6209-2Z shares the 45×85×19 mm envelope but rates differently (35.1/21.6 kN vs 28.1/20.4 kN) — not a load-rating equivalent. |
| 209 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF 209 shares the 45×85×19 mm envelope but catalogue C/C0 differ — envelope match only after a load check. |
| 209-ZZ | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF 209-2Z shares the 45×85×19 mm envelope but catalogue C/C0 differ — envelope match only after a load check. |
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 6209-ZZ model number is decoded
In the 6200-series (diameter series 2 of ISO 15) the last two digits encode the bore: 6209 carries bore code 09 = 45 mm. Outside diameter 85 mm and width 19 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 45 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 6209-2Z.
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
- electrical pitting in VFD-driven motors without grounding protection
- raceway smearing under marginal lubrication at start-up
Selection pitfalls — read before you substitute
- Sizes around 45 mm bore are normally pressed on cold with a sleeve against the inner-ring face; the press force must never route through the outer ring or the balls of 6209-ZZ.
- The 62xx light series is the default general-purpose section at 45 mm bore; before upgrading to a 6309 for extra capacity, confirm the housing accepts a 85 mm OD and 19 mm width — it is not a drop-in swap.
- Do not wash 6209-ZZ in solvent before mounting: the grease inside the shielded cavity is the service fill, and solvent creeping past the shield gap strips it out.
- Shielded 6209-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.
- The housing bore for the 85 mm OD should be round within IT7; an oval bore pinches the outer ring of 6209-ZZ and shows up later as two-point loaded raceway wear.
- Deep-groove ball bearings tolerate only minutes of misalignment; if the 85 mm housing cannot be aligned, switch to a self-aligning type rather than shimming 6209-ZZ.
- SKF spells the shielded version 6209-2Z (one shield: 6209-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 6209-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 6209-2Z for high-contamination positions.
- The 35.1/21.6 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 6209-ZZ bearing?
A 6209-ZZ deep-groove ball bearing has a 45 mm bore, 85 mm outer diameter and 19 mm width (1.772 × 3.346 × 0.748 in), per ISO 15 boundary dimensions. It is fitted with two non-contact metallic shields.
What lubrication does 6209-ZZ need?
6209-ZZ is greased at the factory and the shields hold the fill for the bearing's service life; relubrication is not intended, and adding grease through the shield gap usually forces dirt in with it.
How does the 6209 bore code work?
The last two digits of 6209 are bore code 09, giving 09 × 5 = 45 mm bore. The 85 mm outside diameter and 19 mm width follow the ISO 15 diameter series, not the bore code alone.
What does the ZZ suffix on 6209-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.
What is the SKF designation and catalogue data for 6209-ZZ?
In the SKF Rolling Bearings catalogue this size is listed as 6209-2Z — two non-contact sheet-metal shields, 45×85×19 mm per ISO 15. Quoted values: C 35.1 kN, C0 21.6 kN, Pu 0.92 kN, limiting speed 8500 r/min, mass 430 g. Brand suffixes (2Z, 2RSH, 2RSL) differ from the industry-neutral spelling 6209-ZZ.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018) on 2026-09-25. Read our editorial & correction policy.