3314-A bearing: complete specifications & equivalents
The 3314-A is a ISO 15 radial bearing sized 70 x 150 x 63.5 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 70 mm |
| Outer diameter D | 150 mm |
| Width B | 63.5 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 163 kN |
| Basic static load rating C0 | 125 kN |
| Fatigue load limit Pu | 5 kN |
| Reference speed (thermal) | 5000 rpm |
| Limiting speed (mechanical) | 4300 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 5050 g |
| Manufacturer designation | 3314 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 | 2.756 in |
|---|---|
| Outer diameter D | 5.906 in |
| Width B | 2.5 in |
| ISO bore code | 14 |
| Radial section height (D−d)/2 | 40 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) | 13 of 20 |
| Bore above smallest 3300-series size | 55 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 3314-A-2Z | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 70×150×63.5 mm envelope with catalogue ratings within 10 %; 3314 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 3314-A model number is decoded
3314 A is SKF's 70 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, 70×150×63.5 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 70×150×63.5 mm (2.756×5.906×2.5 in), 40.0 mm radial section height, C 163 kN, C0 125 kN, Pu 5 kN.reference speed 5,000 r/min (thermal) and limiting speed 4,300 r/min (mechanical), catalogue mass 5050 g. Load balance: C0 125 kN against C 163 kN gives a 0.77 ratio, typical of a double-row bidirectional design; Pu 5 kN enters the SKF adjusted-life equation rather than the basic rating life. The 5 kN fatigue load limit is the equivalent-load floor for long-life adjustment; with 163/125 kN ratings and 5050 g mass this execution carries about 2.33 kN of C per millimetre of bore. Speed-ratio note for this exact unit: the reference speed is 5,000 r/min against a 4,300 r/min limiting speed, i.e. a reference-to-limit ratio of 1.16.
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
- electrical pitting on VFD-driven shafts without grounding protection
- rolling-contact fatigue spalling after the rated L10 life is exceeded
Selection pitfalls — read before you substitute
- Catalogue ratings of 163/125 kN apply to the A execution; the D and DNRCBM two-piece-ring executions carry their own figures on their own pages.
- A capped 3314-2Z/-2RS1 execution of this envelope exists for sealed-for-life duty; an open double-row bearing needs application sealing and a defined lubricant supply.
- Interference goes on the rotating ring (about k5 at 70 mm bore); the wide 63.5 mm ring is sensitive to tilted seats, so check squareness before clamping.
- Interference goes on the rotating ring (about k5 at 70 mm bore); the wide 63.5 mm ring is sensitive to tilted seats, so check squareness before clamping.
- Catalogue ratings are SKF PUB BU/P1 17000 figures for 3314 A as the double a steel execution; the other order numbers of the 3314 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 3314-A?
3314 A measures 70 mm bore × 150 mm OD × 63.5 mm width (2.756 × 5.906 × 2.5 in), mass about 5050 g. SKF 17000 ratings: C 163 kN, C0 125 kN, Pu 5 kN, reference speed 5,000 r/min (thermal) and limiting speed 4,300 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.
Why choose the double-row 3314 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.
What does the D mean in A?
D marks a two-piece inner ring, used on the heavy 33-series executions to simplify mounting; the rest of the suffix identifies the cage (MA brass outer-ring-centred, M brass ball-centred, J1 stamped steel, TN9 PA66) and snap-ring/clearance options (NR, CB).
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.