3313-A bearing: complete specifications & equivalents
The 3313-A is a ISO 15 radial bearing sized 65 x 140 x 58.7 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 65 mm |
| Outer diameter D | 140 mm |
| Width B | 58.7 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 146 kN |
| Basic static load rating C0 | 110 kN |
| Fatigue load limit Pu | 4.55 kN |
| Reference speed (thermal) | 5300 rpm |
| Limiting speed (mechanical) | 4500 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 4100 g |
| Manufacturer designation | 3313 A |
| 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 & 3300-series range
| Bore d | 2.559 in |
|---|---|
| Outer diameter D | 5.512 in |
| Width B | 2.311 in |
| ISO bore code | 13 |
| Radial section height (D−d)/2 | 37.5 mm |
| Smallest bore in 3300-series | 15 mm |
| Largest outer diameter in 3300-series | 240 mm |
| Width range across 3300-series | 19–92.1 mm |
| Bore position in 3300-series (smallest first) | 12 of 20 |
| Bore above smallest 3300-series size | 50 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 3313-DNRCBM | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 65×140×58.7 mm envelope, but catalogue C/C0 differ between executions (146/110 kN vs 138/122 kN) — boundary dimensions match, not a load-rating equivalent. |
| 3313-A-2Z | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 65×140×58.7 mm envelope with catalogue ratings within 10 %; 3313 A-2Z is the stamped steel cage, shields (-2Z) execution of this size — boundary dimensions interchangeable, execution differs. |
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 3313-A model number is decoded
3313 A is SKF's 65 mm-bore double-row angular-contact ball bearing of the 3300 series — two ball rows back-to-back for two-direction axial location in one unit, 65×140×58.7 mm. A on a double-row bearing means no filling slots, so both rows carry their full ball complement in both directions. with no cage suffix the double-row A execution uses the standard stamped steel ball-centred cage. Envelope 65×140×58.7 mm (2.559×5.512×2.311 in), 37.5 mm radial section height, C 146 kN, C0 110 kN, Pu 4.55 kN.reference speed 5,300 r/min (thermal) and limiting speed 4,500 r/min (mechanical), catalogue mass 4100 g. Selection figures for 3313 A: the static-to-dynamic ratio C0/C is 0.75, Pu 4.55 kN is about 3 % of C, and catalogue mass works out to roughly 63 g per millimetre of bore. Speed planning distinguishes the two published ceilings mechanically: the cage and balls tolerate 4,500 r/min while thermal balance under catalogue load sets the 5,300 r/min reference; at dm ≈ 102.5 mm the corresponding dn is approximately 461k mm·r/min. Bore-to-OD planning: OD 140 over bore 65 is a 2.15× step for this size, and the 58.7 mm width gives a bore/width ratio of 1.11; use these ratios when housing space around the 65 mm shaft is the first constraint.
Typical equipment & failure modes
Common applications
- heavy gearbox shafts carrying reversing thrust
- process pump and agitator drives
- crane and winch gearboxes
Known failure patterns
- false brinelling on the loaded row while the shaft stands idle under vibration
- snap-ring groove or two-piece-ring damage when the D execution is pressed home through the wrong ring
- stamped steel cage noise and pocket wear in marginal-lubrication starts, where a brass-cage execution would survive
- brinelling from pressing the ring home through the balls or from static overload
- mounting score marks when the bearing is cocked over a burr or keyway
Selection pitfalls — read before you substitute
- The D executions have a two-piece inner ring: mount both halves square to each other, never press on the outer ring, and keep the split faces clean during fitting.
- Interference goes on the rotating ring (about k5 at 65 mm bore); the wide 58.7 mm ring is sensitive to tilted seats, so check squareness before clamping.
- Catalogue ratings of 146/110 kN apply to the A execution; the D and DNRCBM two-piece-ring executions carry their own figures on their own pages.
- A capped 3313-2Z/-2RS1 execution of this envelope exists for sealed-for-life duty; an open double-row bearing needs application sealing and a defined lubricant supply.
- Catalogue ratings are SKF PUB BU/P1 17000 figures for 3313 A as the double a steel execution; the other order numbers of the 3313 size are different products and may carry different ratings — always quote the full designation when purchasing.
Frequently asked questions
What are the dimensions and catalogue data of 3313-A?
3313 A measures 65 mm bore × 140 mm OD × 58.7 mm width (2.559 × 5.512 × 2.311 in), mass about 4100 g. SKF 17000 ratings: C 146 kN, C0 110 kN, Pu 4.55 kN, reference speed 5,300 r/min (thermal) and limiting speed 4,500 r/min (mechanical).
What does the A suffix mean?
A on a double-row bearing means no filling slots, so both rows carry their full ball complement in both directions. with no cage suffix the double-row A execution uses the standard stamped steel ball-centred cage.
Which fits should I use?
With a rotating inner ring use roughly k5 on the 65 mm shaft and H7 in the 140 mm housing; check the wide ring seats square because the 58.7 mm width is sensitive to tilt.
Why choose the double-row 3313 instead of two single-row bearings?
The double-row bearing locates the shaft in both axial directions in one unit, in one housing bore and with factory-controlled axial clearance — a more compact arrangement than a pair, with no field matching of ground faces. A single-row pair offers adjustable preload instead.
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.