3214-A bearing: complete specifications & equivalents
The 3214-A is a ISO 15 radial bearing sized 70 x 125 x 39.7 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 | 125 mm |
| Width B | 39.7 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 88.4 kN |
| Basic static load rating C0 | 80 kN |
| Fatigue load limit Pu | 3.4 kN |
| Reference speed (thermal) | 5600 rpm |
| Limiting speed (mechanical) | 4500 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1900 g |
| Manufacturer designation | 3214 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 & 3200-series range
| Bore d | 2.756 in |
|---|---|
| Outer diameter D | 4.921 in |
| Width B | 1.563 in |
| ISO bore code | 14 |
| Radial section height (D−d)/2 | 27.5 mm |
| Smallest bore in 3200-series | 10 mm |
| Largest outer diameter in 3200-series | 200 mm |
| Width range across 3200-series | 14–69.8 mm |
| Bore position in 3200-series (smallest first) | 15 of 22 |
| Bore above smallest 3200-series size | 60 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 3214-A-2Z | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 70×125×39.7 mm envelope with catalogue ratings within 10 %; 3214 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 3214-A model number is decoded
3214 A is SKF's 70 mm-bore double-row angular-contact ball bearing of the 3200 series — two ball rows back-to-back for two-direction axial location in one unit, 70×125×39.7 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 70×125×39.7 mm (2.756×4.921×1.563 in), 27.5 mm radial section height, C 88.4 kN, C0 80 kN, Pu 3.4 kN.reference speed 5,600 r/min (thermal) and limiting speed 4,500 r/min (mechanical), catalogue mass 1900 g. At the printed limiting speed of 4,500 r/min the mean pitch diameter dm ≈ 97.5 mm implies a dn value around 439k mm·r/min; the 5,600 r/min reference speed is the thermal-planning figure under catalogue load. Selection figures for 3214 A: the static-to-dynamic ratio C0/C is 0.90, Pu 3.4 kN is about 4 % of C, and catalogue mass works out to roughly 27 g per millimetre of bore. Speed-ratio note for this exact unit: the reference speed is 5,600 r/min against a 4,500 r/min limiting speed, i.e. a reference-to-limit ratio of 1.24.
Typical equipment & failure modes
Common applications
- crane and winch gearboxes
- paper-machine dryer-section gearing
- cement and mineral processing drives
Known failure patterns
- loss of controlled axial clearance (CB) after thermal growth removes residual play
- tilted mounting that loads one double row more heavily than the other
- stamped steel cage noise and pocket wear in marginal-lubrication starts, where a brass-cage execution would survive
- edge loading from shaft deflection or housing misalignment
- brinelling from pressing the ring home through the balls or from static overload
Selection pitfalls — read before you substitute
- Catalogue ratings of 88.4/80 kN apply to the A execution; the D and DNRCBM two-piece-ring executions carry their own figures on their own pages.
- Interference goes on the rotating ring (about k5 at 70 mm bore); the wide 39.7 mm ring is sensitive to tilted seats, so check squareness before clamping.
- Controlled axial clearance is the heart of the design: the A execution is produced to the standard double-row axial clearance; check residual clearance after mounting and at operating temperature.
- The double-row 3214 takes thrust in both directions by itself — that is the reason to choose it over two single-row bearings: one housing bore, one fit, built-in set geometry.
- Catalogue ratings are SKF PUB BU/P1 17000 figures for 3214 A as the double a steel execution; the other order numbers of the 3214 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 3214-A?
3214 A measures 70 mm bore × 125 mm OD × 39.7 mm width (2.756 × 4.921 × 1.563 in), mass about 1900 g. SKF 17000 ratings: C 88.4 kN, C0 80 kN, Pu 3.4 kN, reference speed 5,600 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.
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).
Does the 3214 double-row bearing need pairing?
No — both ball rows are built into one bearing, so bidirectional location does not require a second unit. Controlled axial clearance is part of the design rather than a field adjustment.
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.