62311-2RS bearing: complete specifications & equivalents
The 62311-2RS is a ISO 15 radial bearing sized 55 x 120 x 43 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 | 55 mm |
| Outer diameter D | 120 mm |
| Width B | 43 mm |
| Material | GCr15 |
| Seal / shield | 2RS |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 71.5 kN |
| Basic static load rating C0 | 45 kN |
| Fatigue load limit Pu | 1.9 kN |
| Limiting speed (mechanical) | 3800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 2050 g |
| Manufacturer designation | 62311-2RS1 |
| 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 & 62300-series range
| Bore d | 2.165 in |
|---|---|
| Outer diameter D | 4.724 in |
| Width B | 1.693 in |
| ISO bore code | 11 |
| Radial section height (D−d)/2 | 32.5 mm |
| Smallest bore in 62300-series | 10 mm |
| Largest outer diameter in 62300-series | 150 mm |
| Width range across 62300-series | 17–51 mm |
| Bore position in 62300-series (smallest first) | 12 of 15 |
| Bore above smallest 62300-series size | 45 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 4311-ATN9 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 55×120×43 mm envelope as SKF 4311 ATN9, but catalogue C/C0 differ (71.5/45 kN vs 97.5/83 kN) — envelope match only after a load check. |
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 62311-2RS model number is decoded
The 62300-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: 62311 carries code 11 = 55 mm (code × 5). The envelope is 55×120×43 mm (2.165×4.724×1.693 in) with a 32.5 mm radial section height, C 71.5 kN, C0 45 kN and Pu 1.9 kN. SKF catalogues the sealed execution as 62311-2RS1: 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 3800 r/min, catalogue mass 2050 g.
Typical equipment & failure modes
Common applications
- gearboxes and speed reducers
- centrifugal and positive-displacement pumps
- material-handling equipment
- industrial fans
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
- brinelling from static overload or hammer blows during mounting
- false brinelling from vibration while the shaft stands idle
Selection pitfalls — read before you substitute
- Assign interference to the rotating ring: on a conventional shaft-mounted 55 mm position the inner ring rotates, so use a k5/m6 shaft seat with an H7 housing — reverse the logic if the outer ring rotates.
- Assign interference to the rotating ring: on a conventional shaft-mounted 55 mm position the inner ring rotates, so use a k5/m6 shaft seat with an H7 housing — reverse the logic if the outer ring rotates.
- Contact seals make 62311-2RS slower than the open 62311 (limiting 3800 r/min) and forbid solvent washing, which destroys the lifetime grease.
- Do not pry the caps off 62311-2RS to repack it; shield/seal damage leaves a gap that throws grease and admits dirt.
- Assign interference to the rotating ring: on a conventional shaft-mounted 55 mm position the inner ring rotates, so use a k5/m6 shaft seat with an H7 housing — reverse the logic if the outer ring rotates.
- Deep-groove geometry tolerates only minutes of misalignment; if the 120 mm housing bore cannot be aligned, move to a self-aligning bearing rather than shimming 62311-2RS.
Frequently asked questions
What are the dimensions of 62311-2RS?
The SKF 62311-2RS1 measures 55 mm bore × 120 mm OD × 43 mm width (2.165 × 4.724 × 1.693 in), mass about 2050 g. It has two contact rubber seals and a lifetime grease fill.
How does the bore code in 62311 work?
The final two digits of 62311 are bore code 11, multiplied by 5 to give 55 mm.
How heavy is 62311-2RS?
Catalogue mass is 2050 g for 62311-2RS1; seal and cage executions of the same envelope differ by a few grams.
What load can 62311-2RS take?
Catalogue values for 62311-2RS1: dynamic C 71.5 kN, static C0 45 kN, fatigue limit Pu 1.9 kN. Use C in life calculation and C0 for static checks at 55 mm bore.
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.