W63800-ZZ bearing: complete specifications & equivalents
The W63800-ZZ is a ISO 15 radial bearing sized 10 x 19 x 7 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 | 10 mm |
| Outer diameter D | 19 mm |
| Width B | 7 mm |
| Material | SS440C |
| Seal / shield | ZZ |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 1.48 kN |
| Basic static load rating C0 | 0.83 kN |
| Fatigue load limit Pu | 0.036 kN |
| Reference speed (thermal) | 80000 rpm |
| Limiting speed (mechanical) | 38000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 7.1 g |
| Manufacturer designation | W 63800-2Z |
| 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 & 63800-series range
| Bore d | 0.394 in |
|---|---|
| Outer diameter D | 0.748 in |
| Width B | 0.276 in |
| ISO bore code | 00 |
| Radial section height (D−d)/2 | 4.5 mm |
| Smallest bore in 63800-series | 1.5 mm |
| Largest outer diameter in 63800-series | 28 mm |
| Width range across 63800-series | 2–9 mm |
| Bore position in 63800-series (smallest first) | 8 of 8 |
| Bore above smallest 63800-series size | 8.5 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the W63800-ZZ model number is decoded
The W prefix denotes SKF stainless steel deep-groove bearings (X108CrMo17 / AISI 440C class rings). In the 63800-series, bore code 00 follows the 10/12/15/17 mm exception table, so 63800 fits a 10 mm shaft. Envelope 10×19×7 mm (0.394×0.748×0.276 in), C 1.48 kN, C0 0.83 kN, Pu 0.036 kN; limiting speed 38000 r/min and mass 7.1 g. SKF spells the double shield W 63800-2Z (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
- chemical and marine atmospheres
- medical and laboratory devices
- small pumps handling corrosive media
- bicycle and outdoor equipment
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
- 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 — W63800-ZZ is not marine-grade stainless.
- The stainless steel is martensitic and MAGNETIC; do not reject W63800-ZZ over magnetism — only austenitic grades are non-magnetic, and those are too soft for bearing raceways.
- Stainless bearings carry lower load ratings than chrome steel of the same envelope: W63800-ZZ is quoted at C 1.48 kN versus the 7 mm-wide 52100 version — do not swap on dimensions alone.
- Food, pharmaceutical and washdown positions need food-grade grease (e.g. NSF H1 registered) inside W63800-ZZ; standard fill is industrial grease unless specified otherwise.
- Do not preload W63800-ZZ to silence it: a deep-groove ball bearing is not angular-contact, and axial preload only raises temperature and shortens grease life.
- Mount by heating the inner ring (max 120 °C) — driving W63800-ZZ home through the outer ring or balls brinells the raceways.
Frequently asked questions
What are the dimensions of the stainless W63800-ZZ?
SKF W 63800-2Z measures 10×19×7 mm (0.394×0.748×0.276 in), about 7.1 g, C 1.48 kN.
What does the W in W 63800-2Z 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.
Can I replace a chrome-steel bearing with stainless W63800-ZZ?
The envelope matches, but stainless rates lower (C 1.48 kN for W 63800-2Z); for corrosive environments that trade-off is intended, for high loads it shortens life.
Is the stainless bearing magnetic?
Yes. Bearing stainless steels are martensitic (hardened) and magnetic; non-magnetic austenitic grades cannot be hardened enough for raceways and balls.
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.