RNA4900-2RS bearing: complete specifications & equivalents
The RNA4900-2RS is a ISO 1206 radial bearing sized 14 x 22 x 13 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 | 14 mm |
| Outer diameter D | 22 mm |
| Width B | 13 mm |
| Material | GCr15 |
| Seal / shield | 2RS |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | none |
| Basic dynamic load rating C | 7.37 kN |
| Basic static load rating C0 | 8.15 kN |
| Fatigue load limit Pu | 0.965 kN |
| Limiting speed (mechanical) | 12000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 16 g |
| Manufacturer designation | RNA 4900.2RS |
| Standard | ISO 1206 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 7.3 machined rings with flanges, without an inner ring |
| Last verified | 2026-09-26 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 7.3 machined rings with flanges, without an inner ring) · extracted 2026-09-26
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 7.3 machined rings with flanges, without an inner ring); 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 & RNA-49-series range
| Bore d | 0.551 in |
|---|---|
| Outer diameter D | 0.866 in |
| Width B | 0.512 in |
| ISO bore code | 00 |
| Radial section height (D−d)/2 | 4 mm |
| Smallest bore in RNA-49-series | 14 mm |
| Largest outer diameter in RNA-49-series | 190 mm |
| Width range across RNA-49-series | 13–50 mm |
| Bore position in RNA-49-series (smallest first) | 1 of 28 |
| Bore above smallest RNA-49-series size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| RNA4900 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 14×22×13 mm envelope, but catalogue C/C0 differ between the executions (7.37/8.15 vs 8.8/10.4 kN) — boundary dimensions match, 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 RNA4900-2RS model number is decoded
RNA 4900.2RS is a ribbed machined-ring needle roller bearing (no inner ring) sized 14×22×13 mm: the ground outside diameter seats in the housing, the integral flanges hold the rollers, and the 14 mm shaft journal completes the bearing. The letters identify a flanged machined outer ring without inner ring; the figures give 14 mm Fw and 13 mm B — dimensionally identical envelopes exist with an inner ring under the NA/NKI names, which changes the shaft seat entirely. Execution notes: the outer ring flanges are rolled from the ring material (no loose ribs to dislodge), the roller set is caged for low friction, and the TN option swaps in a polymer cage for quieter running. Speed planning separates the two ceilings: no reference speed listed for this sealed/slow execution and 12,000 r/min mechanical limiting — needle bearings tolerate high rpm only with adequate lubricant film at the 14 mm seat. Mounting: the flanged outer ring presses into the H7 housing bore against its flange face; the shaft (hardened to 58–64 HRC, ground) enters afterwards, and axial retention is by the housing wall plus a cover washer.
Typical equipment & failure modes
Common applications
- gearbox planetary and idler gears on hardened pins
- piston-pin style pivots in hydraulic pumps
- guide rollers running on hardened tracks
- swing arms and lever pivots with oscillating duty
Known failure patterns
- raceway spalling once the catalogue L10 life is exceeded or after overload events
- polymer cage deformation when the local temperature exceeds the 120 °C sustained limit
- grease starvation at the roller ends when relubrication intervals are stretched in dirty duty
- corrosion pitting from condensation in intermittently operated machinery
- smearing of rollers and journal during idle periods because the radial section holds too little lubricant
Selection pitfalls — read before you substitute
- On a 14 mm seat the housing bore quality dominates life: a bore 0.02 mm out of round pinches the 22 mm ring or cup into a lobed shape, and the rollers then trace the housing's geometry error, not the design load.
- Hardness is load capacity: in families without an inner ring the 14 mm journal must hold 58–64 HRC with a ground finish; a surface that looks fine but sits at 45 HRC will rib the raceway within weeks.
- The quoted 7.37/8.15 kN ratings are SKF catalogue values for this exact execution (RNA 4900.2RS); ratings can be revised without the order number changing, so keep the catalogue version (SKF catalogue PUB BU/P1 17000) with the drawing.
- The 7.37/8.15 kN ratings and 16 g mass are SKF catalogue values transcribed from ch. 7.3 of PUB BU/P1 17000 (PDF table page 626); combined-type axial ratings appear in the text above because the structured record carries radial values only.
Frequently asked questions
What limits the service life of a RNA 4900.2RS?
Beyond the L10 rating, the practical limits are journal/raceway hardness for the 14 mm seat, lubricant condition at the roller ends, and contamination through open ends — the 4.0 mm radial section leaves no reserve once a raceway is dented or ribboned.
What are the dimensions and ratings of the RNA 4900.2RS?
A RNA 4900.2RS measures 14 mm bore/Fw × 22 mm outside diameter × 13 mm width (0.551 × 0.866 × 0.512 in). From SKF catalogue PUB BU/P1 17000: radial dynamic rating C 7.37 kN, static C0 8.15 kN, fatigue limit Pu 0.965 kN, limiting speed 12,000 r/min, mass about 16 g.
How is the RNA 4900.2RS designation read?
RNA names a machined-ring needle roller bearing without inner ring: the figures give Fw 14 mm and width 13 mm, OD 22 mm comes from the dimension series, and the flanged outer ring retains the caged rollers.
Can the RNA 4900.2RS run on an unhardened shaft?
No. In this execution the 14 mm shaft journal is the inner raceway: it must be ground and hardened to 58–64 HRC (with matching housing bore quality on the outside). If the shaft cannot meet that, order the inner-ring sibling (NKI/NA execution) plus its ground inner ring instead.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 7.3 machined rings with flanges, without an inner ring on 2026-09-26. Read our editorial & correction policy.