3215-A bearing: complete specifications & equivalents
The 3215-A is a ISO 15 radial bearing sized 75 x 130 x 41.3 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 75 mm |
| Outer diameter D | 130 mm |
| Width B | 41.3 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 95.6 kN |
| Basic static load rating C0 | 88 kN |
| Fatigue load limit Pu | 3.75 kN |
| Reference speed (thermal) | 5300 rpm |
| Limiting speed (mechanical) | 4500 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 2100 g |
| Manufacturer designation | 3215 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 | 2.953 in |
|---|---|
| Outer diameter D | 5.118 in |
| Width B | 1.626 in |
| ISO bore code | 15 |
| 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) | 16 of 22 |
| Bore above smallest 3200-series size | 65 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 3215-A-2Z | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 75×130×41.3 mm envelope with catalogue ratings within 10 %; 3215 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 3215-A model number is decoded
3215 A is SKF's 75 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, 75×130×41.3 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 75×130×41.3 mm (2.953×5.118×1.626 in), 27.5 mm radial section height, C 95.6 kN, C0 88 kN, Pu 3.75 kN.reference speed 5,300 r/min (thermal) and limiting speed 4,500 r/min (mechanical), catalogue mass 2100 g. Mass and section check: 2100 g inside the 75×130×41.3 mm outline leaves a 27.5 mm radial section, and the 88 kN static rating is 0.92× the dynamic rating — plan static safety and minimum load against those numbers rather than against sister executions. Sizing arithmetic on the 75 mm bore: 95.6 kN C divided by the 27.5 mm radial section height gives 3.5 kN per section millimetre; the 2100 g mass and 4 % Pu/C share frame the light-load floor for the adjusted-life check. Speed-ratio note for this exact unit: the reference speed is 5,300 r/min against a 4,500 r/min limiting speed, i.e. a reference-to-limit ratio of 1.18.
Typical equipment & failure modes
Common applications
- heavy gearbox shafts carrying reversing thrust
- process pump and agitator drives
- crane and winch gearboxes
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
- rolling-contact fatigue spalling after the rated L10 life is exceeded
- electrical pitting on VFD-driven shafts without grounding protection
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.
- Catalogue ratings of 95.6/88 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 75 mm bore); the wide 41.3 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.
- Catalogue ratings are SKF PUB BU/P1 17000 figures for 3215 A as the double a steel execution; the other order numbers of the 3215 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 3215-A?
3215 A measures 75 mm bore × 130 mm OD × 41.3 mm width (2.953 × 5.118 × 1.626 in), mass about 2100 g. SKF 17000 ratings: C 95.6 kN, C0 88 kN, Pu 3.75 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.
Why choose the double-row 3215 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.