62309-2RS bearing: complete specifications & equivalents
The 62309-2RS is a ISO 15 radial bearing sized 45 x 100 x 36 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 | 45 mm |
| Outer diameter D | 100 mm |
| Width B | 36 mm |
| Material | GCr15 |
| Seal / shield | 2RS |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 52.7 kN |
| Basic static load rating C0 | 31.5 kN |
| Fatigue load limit Pu | 1.34 kN |
| Limiting speed (mechanical) | 4500 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1200 g |
| Manufacturer designation | 62309-2RS1 |
| 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 | 1.772 in |
|---|---|
| Outer diameter D | 3.937 in |
| Width B | 1.417 in |
| ISO bore code | 09 |
| Radial section height (D−d)/2 | 27.5 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) | 10 of 15 |
| Bore above smallest 62300-series size | 35 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 4309-ATN9 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 45×100×36 mm envelope as SKF 4309 ATN9, but catalogue C/C0 differ (52.7/31.5 kN vs 68.9/56 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 62309-2RS 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: 62309 carries code 09 = 45 mm (code × 5). The envelope is 45×100×36 mm (1.772×3.937×1.417 in) with a 27.5 mm radial section height, C 52.7 kN, C0 31.5 kN and Pu 1.34 kN. SKF catalogues the sealed execution as 62309-2RS1: 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 4500 r/min, catalogue mass 1200 g.
Typical equipment & failure modes
Common applications
- industrial electric motors
- gearboxes and speed reducers
- centrifugal and positive-displacement pumps
- material-handling equipment
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
- false brinelling from vibration while the shaft stands idle
- fretting corrosion on a creeping shaft or housing seat
Selection pitfalls — read before you substitute
- Do not preload 62309-2RS to silence it: a deep-groove ball bearing is not angular-contact, and axial preload only raises temperature and shortens grease life.
- Clearance suffixes follow the seal code in the designation stack (e.g. 62309-2Z/C3 in SKF spelling); no suffix means normal CN internal clearance.
- Contact seals make 62309-2RS slower than the open 62309 (limiting 4500 r/min) and forbid solvent washing, which destroys the lifetime grease.
- Do not pry the caps off 62309-2RS to repack it; shield/seal damage leaves a gap that throws grease and admits dirt.
- Clearance suffixes follow the seal code in the designation stack (e.g. 62309-2Z/C3 in SKF spelling); no suffix means normal CN internal clearance.
- At 45 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 62309-2RS?
The SKF 62309-2RS1 measures 45 mm bore × 100 mm OD × 36 mm width (1.772 × 3.937 × 1.417 in), mass about 1200 g. It has two contact rubber seals and a lifetime grease fill.
How does the bore code in 62309 work?
The final two digits of 62309 are bore code 09, multiplied by 5 to give 45 mm.
What load can 62309-2RS take?
Catalogue values for 62309-2RS1: dynamic C 52.7 kN, static C0 31.5 kN, fatigue limit Pu 1.34 kN. Use C in life calculation and C0 for static checks at 45 mm bore.
What is the speed rating of 62309-2RS?
SKF publishes only the 4500 r/min limiting speed for this execution; sealed variants have no thermal reference speed because seal and grease life govern.
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.