3317-A bearing: complete specifications & equivalents
The 3317-A is a ISO 15 radial bearing sized 85 x 180 x 73 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 85 mm |
| Outer diameter D | 180 mm |
| Width B | 73 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 208 kN |
| Basic static load rating C0 | 176 kN |
| Fatigue load limit Pu | 6.55 kN |
| Reference speed (thermal) | 4000 rpm |
| Limiting speed (mechanical) | 3600 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 8300 g |
| Manufacturer designation | 3317 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 | 3.346 in |
|---|---|
| Outer diameter D | 7.087 in |
| Width B | 2.874 in |
| ISO bore code | 17 |
| Radial section height (D−d)/2 | 47.5 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) | 16 of 20 |
| Bore above smallest 3300-series size | 70 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 3317 | ISO 15 | full Dimensions and internal design equivalent — standard interchange. | ISO 15 boundary-dimension envelope; brand-specific OEM equivalents (NSK/FAG/NTN) pending multi-source data. |
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 3317-A model number is decoded
3317 A is SKF's 85 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, 85×180×73 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 85×180×73 mm (3.346×7.087×2.874 in), 47.5 mm radial section height, C 208 kN, C0 176 kN, Pu 6.55 kN.reference speed 4,000 r/min (thermal) and limiting speed 3,600 r/min (mechanical), catalogue mass 8300 g. Envelope economics: the 73 mm width over a 47.5 mm section yields 1.54 mm of ring width per section millimetre, and the bearing weighs 8300 g for 208 kN of dynamic capacity — about 40 g per rated kN. At the printed limiting speed of 3,600 r/min the mean pitch diameter dm ≈ 132.5 mm implies a dn value around 477k mm·r/min; the 4,000 r/min reference speed is the thermal-planning figure under catalogue load. Bore-to-OD planning: OD 180 over bore 85 is a 2.12× step for this size, and the 73 mm width gives a bore/width ratio of 1.16; use these ratios when housing space around the 85 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
- snap-ring groove or two-piece-ring damage when the D execution is pressed home through the wrong ring
- two-direction thrust overload concentrating load on one row and spalling its raceway
- stamped steel cage noise and pocket wear in marginal-lubrication starts, where a brass-cage execution would survive
- hard-particle indentation of the asymmetric raceway in unfiltered oil
- edge loading from shaft deflection or housing misalignment
Selection pitfalls — read before you substitute
- The double-row 3317 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.
- 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 of 208/176 kN apply to the A execution; the D and DNRCBM two-piece-ring executions carry their own figures on their own pages.
- The double-row 3317 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 3317 A as the double a steel execution; the other order numbers of the 3317 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 3317-A?
3317 A measures 85 mm bore × 180 mm OD × 73 mm width (3.346 × 7.087 × 2.874 in), mass about 8300 g. SKF 17000 ratings: C 208 kN, C0 176 kN, Pu 6.55 kN, reference speed 4,000 r/min (thermal) and limiting speed 3,600 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 85 mm shaft and H7 in the 180 mm housing; check the wide ring seats square because the 73 mm width is sensitive to tilt.
Why choose the double-row 3317 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.