W6300 bearing: complete specifications & equivalents
The W6300 is a ISO 15 radial bearing sized 10 x 35 x 11 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 10 mm |
| Outer diameter D | 35 mm |
| Width B | 11 mm |
| Material | SS440C |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 7.02 kN |
| Basic static load rating C0 | 3.4 kN |
| Fatigue load limit Pu | 0.146 kN |
| Reference speed (thermal) | 53000 rpm |
| Limiting speed (mechanical) | 34000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 50 g |
| Manufacturer designation | W 6300 |
| 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 & 6300-series range
| Bore d | 0.394 in |
|---|---|
| Outer diameter D | 1.378 in |
| Width B | 0.433 in |
| ISO bore code | 00 |
| Radial section height (D−d)/2 | 12.5 mm |
| Smallest bore in 6300-series | 2 mm |
| Largest outer diameter in 6300-series | 500 mm |
| Width range across 6300-series | 3–95 mm |
| Bore position in 6300-series (smallest first) | 5 of 40 |
| Bore above smallest 6300-series size | 8 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| W6300-2RS | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 10×35×11 mm envelope and equivalent catalogue ratings; W 6300-2RS1 is the two contact elastomer seals execution of this size — boundary dimensions interchangeable, only the seal/shield/cage execution differs. |
| W6300-ZZ | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 10×35×11 mm envelope and equivalent catalogue ratings; W 6300-2Z is the two non-contact shields execution of this size — boundary dimensions interchangeable, only the seal/shield/cage execution differs. |
| 6300 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF SKF 6300 shares the 10×35×11 mm envelope but carries different catalogue ratings (7.02/3.4 kN vs 8.52/3.4 kN) — the stainless execution is not a load-rating equivalent. |
| 6300-ZZ | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF SKF 6300-2Z shares the 10×35×11 mm envelope but carries different catalogue ratings (7.02/3.4 kN vs 8.52/3.4 kN) — the stainless execution is not a load-rating equivalent. |
| 6300-2RS | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF SKF 6300-2RSH shares the 10×35×11 mm envelope but carries different catalogue ratings (7.02/3.4 kN vs 8.52/3.4 kN) — the stainless execution is not a load-rating equivalent. |
| 6300-RSR | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF SKF 6300-2RSL shares the 10×35×11 mm envelope but carries different catalogue ratings (7.02/3.4 kN vs 8.52/3.4 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 W6300 model number is decoded
The W prefix denotes SKF stainless steel deep-groove bearings (X108CrMo17 / AISI 440C class rings). In the 6300-series, bore code 00 follows the 10/12/15/17 mm exception table, so 6300 fits a 10 mm shaft. Envelope 10×35×11 mm (0.394×1.378×0.433 in), C 7.02 kN, C0 3.4 kN, Pu 0.146 kN; limiting speed 34000 r/min and mass 50 g. The open W 6300 carries no shields or seals and relies on application lubrication and external sealing. 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
- medical and laboratory devices
- small pumps handling corrosive media
- bicycle and outdoor equipment
- appliances exposed to moisture
Known failure patterns
- seal and grease failure before the rings corrode in sustained washdown service
- surface staining and pitting when even the stainless steel is left unlubricated in salty or acidic duty
- contamination wear when the open arrangement is used without external seals
- lubricant starvation where no regreasing interval is maintained
Selection pitfalls — read before you substitute
- Temperatures above roughly 300 °C temper the stainless races; even standard greases fail far earlier — keep W6300 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 — W6300 is not marine-grade stainless.
- The stainless steel is martensitic and MAGNETIC; do not reject W6300 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: W6300 is quoted at C 7.02 kN versus the 11 mm-wide 52100 version — do not swap on dimensions alone.
- Mount by heating the inner ring (max 120 °C) — driving W6300 home through the outer ring or balls brinells the raceways.
- At 10 mm bore, C3 clearance is the safe choice when interference fits plus temperature rise consume the CN clearance; a hot tight bearing with no residual clearance fails fast.
Frequently asked questions
What are the dimensions of the stainless W6300?
SKF W 6300 measures 10×35×11 mm (0.394×1.378×0.433 in), about 50 g, C 7.02 kN.
What does the W in W 6300 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.
Are W stainless bearings waterproof?
No — the stainless rings resist moisture and weak chemicals far better than 52100 chrome steel, but salt spray, strong chlorides and unlubricated washdown duty can still corrode W6300; add seals and food-grade grease for wet positions.
Can I replace a chrome-steel bearing with stainless W6300?
The envelope matches, but stainless rates lower (C 7.02 kN for W 6300); for corrosive environments that trade-off is intended, for high loads it shortens life.
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.