63004-2RS bearing: complete specifications & equivalents
The 63004-2RS is a ISO 15 radial bearing sized 20 x 42 x 16 mm (bore x OD x width) with 2RS sealing. Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 20 mm |
| Outer diameter D | 42 mm |
| Width B | 16 mm |
| Material | GCr15 |
| Seal / shield | 2RS |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 9.36 kN |
| Basic static load rating C0 | 5 kN |
| Fatigue load limit Pu | 0.212 kN |
| Limiting speed (mechanical) | 11000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 86 g |
| Manufacturer designation | 63004-2RS1 |
| 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 & 63000-series range
| Bore d | 0.787 in |
|---|---|
| Outer diameter D | 1.654 in |
| Width B | 0.63 in |
| ISO bore code | 04 |
| Radial section height (D−d)/2 | 11 mm |
| Smallest bore in 63000-series | 10 mm |
| Largest outer diameter in 63000-series | 80 mm |
| Width range across 63000-series | 12–23 mm |
| Bore position in 63000-series (smallest first) | 5 of 11 |
| Bore above smallest 63000-series size | 10 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 63004 | 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. Brand-specific OEM equivalents pending multi-source data. |
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 63004-2RS model number is decoded
The 63000-series is the wide-section counterpart of the standard deep-groove family (extra width code built into the designation); the last two digits encode the bore: 63004 carries code 04 = 20 mm (code × 5). The envelope is 20×42×16 mm (0.787×1.654×0.63 in) with a 11.0 mm radial section height, C 9.36 kN, C0 5 kN and Pu 0.212 kN. SKF catalogues the sealed execution as 63004-2RS1: two contact elastomer lips (2RS1/2RSH spelling) over a lifetime grease fill; the lips add drag, and no reference (thermal) speed is published. Limiting speed 11000 r/min, catalogue mass 86 g.
Typical equipment & failure modes
Common applications
- conveyor drives
- fans and blowers
- agricultural equipment
- garden machinery
Known failure patterns
- contact-seal lip hardening and pre-grease loss after long high-temperature service
- grease-life expiry inside the sealed-for-life cavity, which has no relubrication path
- fretting corrosion on a creeping shaft or housing seat
- cage damage from running beyond the limiting speed
Selection pitfalls — read before you substitute
- Clearance suffixes follow the seal code in the designation stack (e.g. 63004-2Z/C3 in SKF spelling); no suffix means normal CN internal clearance.
- Deep-groove geometry tolerates only minutes of misalignment; if the 42 mm housing bore cannot be aligned, move to a self-aligning bearing rather than shimming 63004-2RS.
- Contact seals make 63004-2RS slower than the open 63004 (limiting 11000 r/min) and forbid solvent washing, which destroys the lifetime grease.
- Do not pry the caps off 63004-2RS to repack it; shield/seal damage leaves a gap that throws grease and admits dirt.
- At 20 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.
- Catalogue ratings for 63004-2RS (C 9.36 kN, C0 5 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 63004-2RS?
The SKF 63004-2RS1 measures 20 mm bore × 42 mm OD × 16 mm width (0.787 × 1.654 × 0.63 in), mass about 86 g. It has two contact rubber seals and a lifetime grease fill.
How does the bore code in 63004 work?
The final two digits of 63004 are bore code 04, multiplied by 5 to give 20 mm.
Which fits should I use for 63004-2RS?
With a rotating inner ring use roughly k5 on the shaft and H7 in the 42 mm housing; reverse the interference if the outer ring rotates.
How heavy is 63004-2RS?
Catalogue mass is 86 g for 63004-2RS1; seal and cage executions of the same envelope differ by a few grams.
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.