3217-A bearing: complete specifications & equivalents
The 3217-A is a ISO 15 radial bearing sized 85 x 150 x 49.2 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 | 150 mm |
| Width B | 49.2 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 124 kN |
| Basic static load rating C0 | 110 kN |
| Fatigue load limit Pu | 4.4 kN |
| Reference speed (thermal) | 4500 rpm |
| Limiting speed (mechanical) | 3800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 3400 g |
| Manufacturer designation | 3217 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 | 3.346 in |
|---|---|
| Outer diameter D | 5.906 in |
| Width B | 1.937 in |
| ISO bore code | 17 |
| Radial section height (D−d)/2 | 32.5 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) | 18 of 22 |
| Bore above smallest 3200-series size | 75 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the 3217-A model number is decoded
3217 A is SKF's 85 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, 85×150×49.2 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 85×150×49.2 mm (3.346×5.906×1.937 in), 32.5 mm radial section height, C 124 kN, C0 110 kN, Pu 4.4 kN.reference speed 4,500 r/min (thermal) and limiting speed 3,800 r/min (mechanical), catalogue mass 3400 g. The 4.4 kN fatigue load limit is the equivalent-load floor for long-life adjustment; with 124/110 kN ratings and 3400 g mass this execution carries about 1.46 kN of C per millimetre of bore. Mass and section check: 3400 g inside the 85×150×49.2 mm outline leaves a 32.5 mm radial section, and the 110 kN static rating is 0.89× the dynamic rating — plan static safety and minimum load against those numbers rather than against sister executions. Bore-to-OD planning: OD 150 over bore 85 is a 1.76× step for this size, and the 49.2 mm width gives a bore/width ratio of 1.73; use these ratios when housing space around the 85 mm shaft is the first constraint.
Typical equipment & failure modes
Common applications
- paper-machine dryer-section gearing
- cement and mineral processing drives
- heavy gearbox shafts carrying reversing thrust
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
- raceway staining from water in the lubricant during idle periods
- fretting corrosion on a loose rotating shaft seat
Selection pitfalls — read before you substitute
- A capped 3217-2Z/-2RS1 execution of this envelope exists for sealed-for-life duty; an open double-row bearing needs application sealing and a defined lubricant supply.
- A capped 3217-2Z/-2RS1 execution of this envelope exists for sealed-for-life duty; an open double-row bearing needs application sealing and a defined lubricant supply.
- A capped 3217-2Z/-2RS1 execution of this envelope exists for sealed-for-life duty; an open double-row bearing needs application sealing and a defined lubricant supply.
- The double-row 3217 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 3217 A as the double a steel execution; the other order numbers of the 3217 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 3217-A?
3217 A measures 85 mm bore × 150 mm OD × 49.2 mm width (3.346 × 5.906 × 1.937 in), mass about 3400 g. SKF 17000 ratings: C 124 kN, C0 110 kN, Pu 4.4 kN, reference speed 4,500 r/min (thermal) and limiting speed 3,800 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 3217 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 85 mm shaft and H7 in the 150 mm housing; check the wide ring seats square because the 49.2 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.