W6001-ZZ bearing: complete specifications & equivalents
The W6001-ZZ is a ISO 15 radial bearing sized 12 x 28 x 8 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 | 12 mm |
| Outer diameter D | 28 mm |
| Width B | 8 mm |
| Material | SS440C |
| Seal / shield | ZZ |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 4.42 kN |
| Basic static load rating C0 | 2.36 kN |
| Fatigue load limit Pu | 0.102 kN |
| Reference speed (thermal) | 60000 rpm |
| Limiting speed (mechanical) | 30000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 20 g |
| Manufacturer designation | W 6001-2Z |
| 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 & 6000-series range
| Bore d | 0.472 in |
|---|---|
| Outer diameter D | 1.102 in |
| Width B | 0.315 in |
| ISO bore code | 01 |
| Radial section height (D−d)/2 | 8 mm |
| Smallest bore in 6000-series | 4 mm |
| Largest outer diameter in 6000-series | 1150 mm |
| Width range across 6000-series | 4–155 mm |
| Bore position in 6000-series (smallest first) | 8 of 61 |
| Bore above smallest 6000-series size | 8 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| W6001-2RS | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 12×28×8 mm envelope and equivalent catalogue ratings; W 6001-2RS1 is the two contact elastomer seals execution of this size — boundary dimensions interchangeable, only the seal/shield/cage execution differs. |
| W6001 | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 12×28×8 mm envelope and equivalent catalogue ratings; W 6001 is the open arrangement execution of this size — boundary dimensions interchangeable, only the seal/shield/cage execution differs. |
| 6001 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF SKF 6001 shares the 12×28×8 mm envelope but carries different catalogue ratings (4.42/2.36 kN vs 5.4/2.36 kN) — the stainless execution is not a load-rating equivalent. |
| 6001-2RS | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF SKF 6001-2RSH shares the 12×28×8 mm envelope but carries different catalogue ratings (4.42/2.36 kN vs 5.4/2.36 kN) — the stainless execution is not a load-rating equivalent. |
| 6001-RSR | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF SKF 6001-2RSL shares the 12×28×8 mm envelope but carries different catalogue ratings (4.42/2.36 kN vs 5.4/2.36 kN) — the stainless execution is not a load-rating equivalent. |
| 6001-ZZ | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF SKF 6001-2Z shares the 12×28×8 mm envelope but carries different catalogue ratings (4.42/2.36 kN vs 5.4/2.36 kN) — the stainless execution is 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 W6001-ZZ model number is decoded
The W prefix denotes SKF stainless steel deep-groove bearings (X108CrMo17 / AISI 440C class rings). In the 6000-series, bore code 01 follows the 10/12/15/17 mm exception table, so 6001 fits a 12 mm shaft. Envelope 12×28×8 mm (0.472×1.102×0.315 in), C 4.42 kN, C0 2.36 kN, Pu 0.102 kN; limiting speed 30000 r/min and mass 20 g. SKF spells the double shield W 6001-2Z (suffix 2Z); the shields are non-contact, retain grease and block coarse debris but are not liquid-tight. Stainless is chosen for corrosion and washdown duty, not for extra load — the same-envelope chrome-steel bearing rates higher.
Typical equipment & failure modes
Common applications
- small pumps handling corrosive media
- bicycle and outdoor equipment
- appliances exposed to moisture
- food and beverage conveyors
Known failure patterns
- surface staining and pitting when even the stainless steel is left unlubricated in salty or acidic duty
- seal and grease failure before the rings corrode in sustained washdown service
- fine-particle abrasion when non-contact shields let dust through in a dirty environment
- grease aging inside the shielded cavity with no relubrication path
Selection pitfalls — read before you substitute
- Corrosion resistance depends on clean, undamaged surfaces: never weld near W6001-ZZ or scratch the raceways during mounting, since the damaged spot starts corrosion.
- Temperatures above roughly 300 °C temper the stainless races; even standard greases fail far earlier — keep W6001-ZZ inside the quoted grease temperature range.
- W-prefix stainless rings (X108CrMo17 / AISI 440C class) resist moisture and weak chemicals but will still rust in chloride-rich or salt-spray duty without protection — W6001-ZZ is not marine-grade stainless.
- The stainless steel is martensitic and MAGNETIC; do not reject W6001-ZZ over magnetism — only austenitic grades are non-magnetic, and those are too soft for bearing raceways.
- Fillet radii must clear the W6001-ZZ chamfer so the 8 mm-wide ring seats square; an oversized shaft radius creates point contact on the ring face.
- Catalogue ratings for W6001-ZZ (C 4.42 kN, C0 2.36 kN) are SKF figures from PUB BU/P1 17000; geometry revisions can change ratings without changing the designation, so keep the catalogue edition with the specification.
Frequently asked questions
What are the dimensions of the stainless W6001-ZZ?
SKF W 6001-2Z measures 12×28×8 mm (0.472×1.102×0.315 in), about 20 g, C 4.42 kN.
What does the W in W 6001-2Z mean?
W is the SKF prefix for stainless steel deep-groove bearings (rings in X108CrMo17 / AISI 440C class); the rest of the designation follows the normal series and bore rules.
Where is W6001-ZZ typically used?
Food and packaging machines, pharmaceutical equipment, washdown conveyors, chemical and marine-atmosphere drives and appliances exposed to moisture.
What grease is supplied in W6001-ZZ?
Sealed units are pre-greased for life; for food or pharmaceutical duty order (or re-grease before service) with an NSF H1 registered food-grade grease.
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.