6300-RSR bearing: complete specifications & equivalents
The 6300-RSR is a ISO 15 radial bearing sized 10 x 35 x 11 mm (bore x OD x width) with RSR sealing. 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 | GCr15 |
| Seal / shield | RSR |
| Internal clearance | CN / C3 available |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 8.52 kN |
| Basic static load rating C0 | 3.4 kN |
| Fatigue load limit Pu | 0.143 kN |
| Reference speed (thermal) | 50000 rpm |
| Limiting speed (mechanical) | 26000 rpm |
| Operating temperature | -30 to +120 °C |
| Mass | 53 g |
| Manufacturer designation | SKF 6300-2RSL |
| 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 & 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 |
|---|---|---|---|
| 6300-2RS-FAG | FAG | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 10×35×11 mm envelope per ISO 15; seal variant differs (RSR vs 2RS) — confirm sealing suits the duty. |
| 6300-FAG | FAG | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 10×35×11 mm envelope per ISO 15; seal variant differs (RSR vs OPEN) — confirm sealing suits the duty. |
| 6300-ZZ-FAG | FAG | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 10×35×11 mm envelope per ISO 15; seal variant differs (RSR vs ZZ) — confirm sealing suits the duty. |
| 6300 | 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. |
| 6300-2RS-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 10×35×11 mm envelope per ISO 15; seal variant differs (RSR vs 2RS) — confirm sealing suits the duty. |
| 6300-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 10×35×11 mm envelope per ISO 15; seal variant differs (RSR vs OPEN) — confirm sealing suits the duty. |
| 6300-RSR-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. |
| 6300-ZZ-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 10×35×11 mm envelope per ISO 15; seal variant differs (RSR vs ZZ) — confirm sealing suits the duty. |
| 6300-2RS-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 10×35×11 mm envelope per ISO 15; seal variant differs (RSR vs 2RS) — confirm sealing suits the duty. |
| 6300-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 10×35×11 mm envelope per ISO 15; seal variant differs (RSR vs OPEN) — confirm sealing suits the duty. |
| 6300-RSR-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. |
| 6300-ZZ-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 10×35×11 mm envelope per ISO 15; seal variant differs (RSR vs ZZ) — confirm sealing suits the duty. |
| W6300-2RS | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF stainless execution W 6300-2RS1 shares the 10×35×11 mm envelope but rates differently (8.52/3.4 kN vs 7.02/3.4 kN) — not a load-rating equivalent. |
| W6300-ZZ | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF stainless execution W 6300-2Z shares the 10×35×11 mm envelope but rates differently (8.52/3.4 kN vs 7.02/3.4 kN) — not a load-rating equivalent. |
| W6300 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF stainless execution W 6300 shares the 10×35×11 mm envelope but rates differently (8.52/3.4 kN vs 7.02/3.4 kN) — 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 6300-RSR model number is decoded
6300-RSR uses two non-contact elastomer lips with very low drag; coarse debris stays out, but the bearing is not liquid-tight. Within the medium 63xx section (diameter series 3 of ISO 15), its bore code 00 comes from the 10/12/15/17 mm exception table, giving a 10 mm bore; the 35 mm outside diameter and 11 mm width follow the same boundary-dimension plan. For a rotating inner ring on a 10 mm shaft under normal load, catalogue practice seats it on a j5 shaft fit with an H7 housing bore — confirm against the actual load direction and magnitude before committing. SKF's low-friction seal suffix is 2RSL/2RZ (this page's industry-neutral spelling is -RSR); catalogue number 6300-2RSL.
Typical equipment & failure modes
Common applications
- instrument drives
- fractional-horsepower electric motors
- domestic appliances
- power tools
Known failure patterns
- ingress of fine dust or moisture past the non-contact lip in dirty or wet duty (RSR is not liquid-tight)
- lip-lubricant starvation if the bearing runs dry for extended periods
- fretting corrosion on a loose shaft seat
- cage damage from operation beyond the limiting speed
Selection pitfalls — read before you substitute
- Bore codes 00–03 use the exception table: 6300 fits a 10 mm shaft — the code × 5 mnemonic does not apply below code 04 (it would imply 0 mm for code 00).
- The 63xx medium section at 10 mm bore gains dynamic rating through larger rolling elements on a 35 mm OD; the penalty is mass and a lower limiting speed than the 6200 — do not specify it for speed-critical shafts.
- RSR low-friction seals on 6300-RSR run faster than contact-seal 6300-2RS but let fine dust and moisture past the non-contact lip; in dirty or wet duty specify 6300-2RS instead.
- The low-drag lip of 6300-RSR barely touches the inner ring; after long shelf storage the grease can separate, so rotate the rings by hand and confirm smooth, silent running before fitting.
- Shaft and housing fillets must clear the bearing chamfer so the 11 mm-wide ring seats square; provide an undercut or withdrawal groove instead of relying on an oversized radius.
- Assign fits by which ring rotates: an interference shaft fit for a rotating inner ring; if the outer ring rotates instead, reverse the logic — a loose rotating ring creeps and frets its seat.
- SKF catalogues the low-friction seal as 6300-2RSL (suffix -2RSL or -2RZ): a non-contact elastomer lip that runs near the open 26000 r/min limiting speed, closer to the open bearing's 50000 r/min reference than the contact-seal version. It keeps coarse debris out without the drag of a contact seal, but is not liquid-tight — use 2RSH for wet or fine-dust positions.
- The 8.52/3.4 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 6300-RSR bearing?
A 6300-RSR deep-groove ball bearing has a 10 mm bore, 35 mm outer diameter and 11 mm width (0.394 × 1.378 × 0.433 in), per ISO 15 boundary dimensions. It is fitted with two low-friction non-contact rubber seals.
What internal clearance does 6300-RSR have?
Unless a clearance suffix says otherwise, 6300-RSR is manufactured to normal (CN) radial internal clearance. Tight fits and hot shafts consume clearance in service — for those conditions order the C3 execution of 6300 and verify the residual clearance after mounting.
How should 6300-RSR be mounted?
Apply the mounting force to the ring being fitted: on a 10 mm shaft seat the press load must pass through the inner-ring face only. A fitting sleeve and an arbor press are normally sufficient at this size. Never strike the outer ring, the cage or the seals.
What lubrication does 6300-RSR need?
6300-RSR is supplied pre-greased for life and is not designed to be opened for relubrication; where a relubrication path is required, specify the open 6300 with a housing grease fitting instead.
What is the SKF designation and catalogue data for 6300-RSR?
In the SKF Rolling Bearings catalogue this size is listed as 6300-2RSL — two low-friction non-contact elastomer seals, 10×35×11 mm per ISO 15. Quoted values: C 8.52 kN, C0 3.4 kN, Pu 0.143 kN, limiting speed 26000 r/min, mass 53 g. Brand suffixes (2Z, 2RSH, 2RSL) differ from the industry-neutral spelling 6300-RSR.
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.