210-ZZ bearing: complete specifications & equivalents
The 210-ZZ is a ISO 15 radial bearing sized 50 x 90 x 20 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 | 50 mm |
| Outer diameter D | 90 mm |
| Width B | 20 mm |
| Material | GCr15 |
| Seal / shield | ZZ |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 39.1 kN |
| Basic static load rating C0 | 34.5 kN |
| Fatigue load limit Pu | 1.46 kN |
| Reference speed (thermal) | 13000 rpm |
| Limiting speed (mechanical) | 6400 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 500 g |
| Manufacturer designation | 210-2Z |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018) |
| Last verified | 2026-09-27 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018)) · extracted 2026-09-27
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 & 200-series range
| Bore d | 1.969 in |
|---|---|
| Outer diameter D | 3.543 in |
| Width B | 0.787 in |
| ISO bore code | 10 |
| Radial section height (D−d)/2 | 20 mm |
| Smallest bore in 200-series | 30 mm |
| Largest outer diameter in 200-series | 180 mm |
| Width range across 200-series | 16–34 mm |
| Bore position in 200-series (smallest first) | 5 of 15 |
| Bore above smallest 200-series size | 20 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 6210-RSR | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | NSK bearing NSK 6210VV on the same 50×90×20 mm envelope, but catalogue C/C0 differ (39.1/34.5 kN vs 38.5/23.2 kN) — envelope interchange only after a load check. |
| 6210-M | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 50×90×20 mm envelope as SKF 6210 M, but catalogue C/C0 differ (39.1/34.5 kN vs 37.1/23.2 kN) — envelope match only after a load check. |
| W6210-2RS | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 50×90×20 mm envelope, but the stainless and chrome-steel executions carry different catalogue ratings (39.1/34.5 kN vs 30.2/23.2 kN) — envelope match, not a load-rating equivalent; choose by corrosion versus load duty. |
| W6210-ZZ | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 50×90×20 mm envelope, but the stainless and chrome-steel executions carry different catalogue ratings (39.1/34.5 kN vs 30.2/23.2 kN) — envelope match, not a load-rating equivalent; choose by corrosion versus load duty. |
| 210 | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 50×90×20 mm envelope and equivalent catalogue ratings; 210 is the open arrangement execution of this size — boundary dimensions interchangeable, only the seal/shield/cage execution differs. |
| 6210 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF SKF 6210 shares the 50×90×20 mm envelope but catalogue C/C0 differ (39.1/34.5 kN vs 37.1/23.2 kN) — envelope match, not a load-rating equivalent. |
| 6210-ZZ | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF SKF 6210-2Z shares the 50×90×20 mm envelope but catalogue C/C0 differ (39.1/34.5 kN vs 37.1/23.2 kN) — envelope match, not a load-rating equivalent. |
| 6210-2RS | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF SKF 6210-2RSH shares the 50×90×20 mm envelope but catalogue C/C0 differ (39.1/34.5 kN vs 37.1/23.2 kN) — envelope match, not a load-rating equivalent. |
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 210-ZZ model number is decoded
210-2Z is a filling-slot (notched-ring) deep-groove bearing in the legacy 200-series: the last two digits encode the bore: 210 carries code 10 = 50 mm (code × 5). The rings carry loading slots that allow extra balls during assembly, which is what gives the 50×90×20 mm envelope its C 39.1 kN and C0 34.5 kN ratings (Pu 1.46 kN). SKF spells the double shield 210-2Z (suffix 2Z); the shields are non-contact, retain grease and block coarse debris but are not liquid-tight. Limiting speed 6400 r/min, mass 500 g. These bearings are built for high purely-radial loads at moderate speeds.
Typical equipment & failure modes
Common applications
- eccentric and vibratory conveyors
- legacy machinery repairs
- slew drives
- material-handling winches
Known failure patterns
- spalling of the filling-slot edge when balls are hammered through the slot under heavy thrust loading
- dirt entering through the open slot area when external sealing is neglected
- brinelling from static overload or hammer blows during mounting
- false brinelling from vibration while the shaft stands idle
Selection pitfalls — read before you substitute
- Filling-slot bearings take heavy purely-radial load at moderate speed but little thrust; the 39.1/34.5 kN ratings assume radial loading — use deep-groove 6xxx where axial load matters.
- Shields on 210-ZZ retain grease but do not seal against water; for wet farm duty add external lip seals rather than trusting the shield.
- Limiting speed is just 6400 r/min: filling-slot cages and the slot geometry run cooler below that — overspeed drives cage wear and smearing.
- Filling slots let more balls be packed into the 50×90 mm envelope, which is why 210-ZZ reaches C 39.1 kN — but the slots also mean the two rings separate when the balls align with them, so handle it as a loose-clearance design.
- Limiting speed is just 6400 r/min: filling-slot cages and the slot geometry run cooler below that — overspeed drives cage wear and smearing.
- Fillet radii must clear the 210-ZZ chamfer so the 20 mm-wide ring seats square; an oversized shaft radius creates point contact on the ring face.
Frequently asked questions
What are the dimensions of 210-ZZ?
Filling-slot bearing 210-2Z measures 50×90×20 mm (1.969×3.543×0.787 in), about 500 g.
What does the designation 210 mean?
It is the legacy 200/300 filling-slot numbering: series 200 and bore code 10 = 50 mm. Filling-slot bearings predate the 6xxx deep-groove spelling.
What fails on 210-ZZ?
Slot-edge chipping under thrust or shock, dirt ingress in the open design and cage wear past the 6400 r/min limiting speed are the typical failure modes.
Is 210-ZZ available sealed?
Shielded executions (-2Z, listed here as 210-ZZ) exist; contact-sealed versions are generally not produced for the filling-slot family.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018) on 2026-09-27. Read our editorial & correction policy.