3216-A bearing: complete specifications & equivalents
The 3216-A is a ISO 15 radial bearing sized 80 x 140 x 44.4 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 80 mm |
| Outer diameter D | 140 mm |
| Width B | 44.4 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 106 kN |
| Basic static load rating C0 | 95 kN |
| Fatigue load limit Pu | 3.9 kN |
| Reference speed (thermal) | 5000 rpm |
| Limiting speed (mechanical) | 4300 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 2650 g |
| Manufacturer designation | 3216 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 | 3.15 in |
|---|---|
| Outer diameter D | 5.512 in |
| Width B | 1.748 in |
| ISO bore code | 16 |
| Radial section height (D−d)/2 | 30 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) | 17 of 22 |
| Bore above smallest 3200-series size | 70 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the 3216-A model number is decoded
3216 A is SKF's 80 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, 80×140×44.4 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 80×140×44.4 mm (3.15×5.512×1.748 in), 30.0 mm radial section height, C 106 kN, C0 95 kN, Pu 3.9 kN.reference speed 5,000 r/min (thermal) and limiting speed 4,300 r/min (mechanical), catalogue mass 2650 g. Selection figures for 3216 A: the static-to-dynamic ratio C0/C is 0.90, Pu 3.9 kN is about 4 % of C, and catalogue mass works out to roughly 33 g per millimetre of bore. Speed planning distinguishes the two published ceilings mechanically: the cage and balls tolerate 4,300 r/min while thermal balance under catalogue load sets the 5,000 r/min reference; at dm ≈ 110.0 mm the corresponding dn is approximately 473k mm·r/min. Bore-to-OD planning: OD 140 over bore 80 is a 1.75× step for this size, and the 44.4 mm width gives a bore/width ratio of 1.80; use these ratios when housing space around the 80 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
- 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
- brinelling from pressing the ring home through the balls or from static overload
- mounting score marks when the bearing is cocked over a burr or keyway
Selection pitfalls — read before you substitute
- Catalogue ratings of 106/95 kN apply to the A execution; the D and DNRCBM two-piece-ring executions carry their own figures on their own pages.
- Compared with a single-row pair of the same bore, the double-row 3216 occupies less axial space but offers less freedom to adjust preload — do not substitute without re-checking the arrangement.
- Interference goes on the rotating ring (about k5 at 80 mm bore); the wide 44.4 mm ring is sensitive to tilted seats, so check squareness before clamping.
- 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 are SKF PUB BU/P1 17000 figures for 3216 A as the double a steel execution; the other order numbers of the 3216 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 3216-A?
3216 A measures 80 mm bore × 140 mm OD × 44.4 mm width (3.15 × 5.512 × 1.748 in), mass about 2650 g. SKF 17000 ratings: C 106 kN, C0 95 kN, Pu 3.9 kN, reference speed 5,000 r/min (thermal) and limiting speed 4,300 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 80 mm shaft and H7 in the 140 mm housing; check the wide ring seats square because the 44.4 mm width is sensitive to tilt.
Why choose the double-row 3216 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.