3312-A bearing: complete specifications & equivalents
The 3312-A is a ISO 15 radial bearing sized 60 x 130 x 54 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 60 mm |
| Outer diameter D | 130 mm |
| Width B | 54 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 127 kN |
| Basic static load rating C0 | 95 kN |
| Fatigue load limit Pu | 4.05 kN |
| Reference speed (thermal) | 5600 rpm |
| Limiting speed (mechanical) | 5000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 2800 g |
| Manufacturer designation | 3312 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 | 2.362 in |
|---|---|
| Outer diameter D | 5.118 in |
| Width B | 2.126 in |
| ISO bore code | 12 |
| Radial section height (D−d)/2 | 35 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) | 11 of 20 |
| Bore above smallest 3300-series size | 45 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 3312-A-2Z | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 60×130×54 mm envelope with catalogue ratings within 10 %; 3312 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 3312-A model number is decoded
3312 A is SKF's 60 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, 60×130×54 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 60×130×54 mm (2.362×5.118×2.126 in), 35.0 mm radial section height, C 127 kN, C0 95 kN, Pu 4.05 kN.reference speed 5,600 r/min (thermal) and limiting speed 5,000 r/min (mechanical), catalogue mass 2800 g. The 4.05 kN fatigue load limit is the equivalent-load floor for long-life adjustment; with 127/95 kN ratings and 2800 g mass this execution carries about 2.12 kN of C per millimetre of bore. Mass and section check: 2800 g inside the 60×130×54 mm outline leaves a 35.0 mm radial section, and the 95 kN static rating is 0.75× the dynamic rating — plan static safety and minimum load against those numbers rather than against sister executions. Bore-to-OD planning: OD 130 over bore 60 is a 2.17× step for this size, and the 54 mm width gives a bore/width ratio of 1.11; use these ratios when housing space around the 60 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
- tilted mounting that loads one double row more heavily than the other
- false brinelling on the loaded row while the shaft stands idle under vibration
- stamped steel cage noise and pocket wear in marginal-lubrication starts, where a brass-cage execution would survive
- raceway staining from water in the lubricant during idle periods
- fretting corrosion on a loose rotating shaft seat
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 127/95 kN apply to the A execution; the D and DNRCBM two-piece-ring executions carry their own figures on their own pages.
- 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.
- 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 3312 A as the double a steel execution; the other order numbers of the 3312 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 3312-A?
3312 A measures 60 mm bore × 130 mm OD × 54 mm width (2.362 × 5.118 × 2.126 in), mass about 2800 g. SKF 17000 ratings: C 127 kN, C0 95 kN, Pu 4.05 kN, reference speed 5,600 r/min (thermal) and limiting speed 5,000 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.
Does the 3312 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.
Which fits should I use?
With a rotating inner ring use roughly k5 on the 60 mm shaft and H7 in the 130 mm housing; check the wide ring seats square because the 54 mm width is sensitive to tilt.
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.