4310-ATN9 bearing: complete specifications & equivalents
The 4310-ATN9 is a ISO 15 radial bearing sized 50 x 110 x 40 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 50 mm |
| Outer diameter D | 110 mm |
| Width B | 40 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | polymer (PA66 glass-fibre reinforced) |
| Basic dynamic load rating C | 81.9 kN |
| Basic static load rating C0 | 69.5 kN |
| Fatigue load limit Pu | 2.9 kN |
| Reference speed (thermal) | 10000 rpm |
| Limiting speed (mechanical) | 5300 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1700 g |
| Manufacturer designation | 4310 ATN9 |
| 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 & 4300-series range
| Bore d | 1.969 in |
|---|---|
| Outer diameter D | 4.331 in |
| Width B | 1.575 in |
| ISO bore code | 10 |
| Radial section height (D−d)/2 | 30 mm |
| Smallest bore in 4300-series | 12 mm |
| Largest outer diameter in 4300-series | 160 mm |
| Width range across 4300-series | 17–55 mm |
| Bore position in 4300-series (smallest first) | 10 of 14 |
| Bore above smallest 4300-series size | 38 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 62310-2RS | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 50×110×40 mm envelope as SKF 62310-2RS1, but catalogue C/C0 differ (81.9/69.5 kN vs 61.8/38 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 4310-ATN9 model number is decoded
4310 ATN9 is a double-row deep-groove ball bearing in the 4300-series: the last two digits encode the bore: 4310 carries code 10 = 50 mm (code × 5). Two complete ball sets share the 50×110×40 mm (1.969×4.331×1.575 in) envelope, giving C 81.9 kN, C0 69.5 kN and Pu 2.9 kN, with reversing axial capacity a single-row bearing cannot match. ATN9 is the glass-fibre PA66 cage. Limiting speed 5300 r/min, mass 1700 g. The arrangement is open and requires external sealing.
Typical equipment & failure modes
Common applications
- lifting and hoisting gear
- fans with axial thrust reversals
- industrial wheel arrangements
- double-supported pump impeller shafts
Known failure patterns
- uneven load sharing between the two raceways when one ring is tilted
- polyamide cage embrittlement after sustained high-temperature service
- false brinelling from vibration while the shaft stands idle
- fretting corrosion on a creeping shaft or housing seat
Selection pitfalls — read before you substitute
- The wide 50×110×40 mm envelope is not interchangeable with a single-row 6210 — the housing and shaft shoulders differ, so design the seat for the double-row width from the start.
- Double-row 4310 is open and needs application sealing and lubrication; in dusty drives add external seals rather than expecting the bearing itself to stay clean.
- C 81.9 kN in a 40 mm width is the strength of the double-row design; use it for combined or reversing axial loads rather than pure radial duty where a slimmer single-row bearing would run cooler.
- Fit both rings square on the shoulders: the narrow internal land between the two raceways of 4310-ATN9 is sensitive to cocking during pressing.
- Fit both rings square on the shoulders: the narrow internal land between the two raceways of 4310-ATN9 is sensitive to cocking during pressing.
- Assign interference to the rotating ring: on a conventional shaft-mounted 50 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.
Frequently asked questions
What are the dimensions of 4310-ATN9?
Double-row 4310 ATN9 measures 50×110×40 mm (1.969×4.331×1.575 in), about 1700 g.
What does ATN9 mean on 4310 ATN9?
A = double-row deep-groove arrangement, TN9 is a glass-fibre-reinforced polyamide 66 cage; it limits continuous temperature to roughly 100–120 °C.
Is 4310-ATN9 interchangeable with a 62-series single-row bearing?
No: although bore matches, OD and width differ and the seat shoulders must suit the wide double-row ring; 50×110×40 mm is its own envelope.
Does 4310-ATN9 run as fast as a single-row bearing?
Somewhat slower: SKF rates it to 5300 r/min; the two cages and wider grease volume generate more drag than a single-row 6210.
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.