32220-SKF bearing: complete specifications & equivalents
The 32220-SKF is a ISO 355 radial bearing sized 100 x 180 x 49 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 100 mm |
| Outer diameter D | 180 mm |
| Width B | 49 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 390 kN |
| Basic static load rating C0 | 440 kN |
| Fatigue load limit Pu | 48 kN |
| Reference speed (thermal) | 3000 rpm |
| Limiting speed (mechanical) | 3600 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 4950 g |
| Manufacturer designation | SKF 32220 |
| Standard | ISO 355 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.1 metric single-row TRB |
| Last verified | 2026-09-28 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.1 metric single-row TRB) · extracted 2026-09-28
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.1 metric single-row TRB); 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 & 32200-series range
| Bore d | 3.937 in |
|---|---|
| Outer diameter D | 7.087 in |
| Width B | 1.929 in |
| ISO bore code | 20 |
| Radial section height (D−d)/2 | 40 mm |
| Smallest bore in 32200-series | 17 mm |
| Largest outer diameter in 32200-series | 580 mm |
| Width range across 32200-series | 17.25–159 mm |
| Bore position in 32200-series (smallest first) | 19 of 36 |
| Bore above smallest 32200-series size | 83 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32220 | FAG | full Dimensions and internal design equivalent — standard interchange. | Identical ISO 15 envelope, seal and ratings band — standard interchange; re-verify precision class and clearance per supplier. |
| 32220 | ISO 15 | full Dimensions and internal design equivalent — standard interchange. | ISO 355 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 32220-SKF model number is decoded
In SKF catalogue PUB BU/P1 17000, 32220 appears as SKF 32220: an open, single-row tapered roller bearing in the heavy section of the 32200 dimension series, supplied with a pressed-steel cage as standard.Digit by digit, 32220 reads as bearing type 3 (single-row tapered roller), heavy section series 22, and bore reference 20 resolving to 100 mm; 180 mm OD and 49 mm width are the matching ISO 355 boundary values. In SKF suffix language a bare 32220 is the standard execution; B marks a larger contact angle and Q or J2 mark clearance/cage variants, all quoted separately. Selection arithmetic: the C0/C ratio is about 1.13 (static 440 kN against dynamic 390 kN), typical of a tapered roller sized for axial capacity, and the 48 kN fatigue load limit Pu is the equivalent-load floor used in the life calculation. Because the contact line is tapered, one 32220 reacts thrust in a single direction; bidirectional shafts need an O or X pair, and a rotating cone on a 100 mm shaft typically takes a k5 seat with an H7 housing bore. Material and manufacturing detail: the 4950 g catalogue mass reflects through-hardened bearing steel (density ~7.85 g/cm³) machined to the 32200 ISO envelope, with the pressed-steel cage contributing roughly 149 g of the total; the 100 mm bore is ground to IT5 roundness and the 180 mm OD to IT5 cylindricity, and the 49 mm width tolerance keeps the pair-setting scatter within the ISO preload class.
Typical equipment & failure modes
Common applications
- heavy industrial gearboxes and speed reducers
- large process pump and compressor shafts
- rolling-mill auxiliary drives
- crane sheave and hoist gearboxes
Known failure patterns
- cup or cone misalignment when the separable rings are not seated square during mounting
- loose cup rotation in the housing when the specified press fit is not achieved
- roller large-end smearing against the cone rib after EP lubricant film failure
- false brinelling on idle paired sets exposed to machine vibration
- pressed-steel cage wear or fracture after prolonged running above the limiting speed
- hard-particle indentation of the tapered raceway in unfiltered oil
Selection pitfalls — read before you substitute
- Mount the 100 mm bore 32220 by induction heating of the cone (max 120 °C — the pressed-steel cage sets the ceiling, not the steel); driving it home through the cup or rollers brinells the tapered raceway.
- The 322 series at 100 mm bore (180×49 mm) is a wider, higher-capacity section than 30220; do not substitute without re-checking shaft shoulder diameters and pair setting.
- O (back-to-back) pairs are stiffer against moments, X (face-to-face) pairs tolerate misalignment and thermal growth better; choosing the arrangement from the 2D drawing rather than the actual shaft thermal expansion is a common 32220 mounting error.
- The tapered contact angle creates an induced axial load under pure radial force; include it in the 32220 rating calculation (and account for it in both bearings of a pair) or the unloaded bearing skids its rollers.
- The 4950 g mass and 49 mm width mean spacer and abutment faces must be square to the axis within the bearing's own P0 tolerance; a tilted spacer tilts the contact angle and concentrates load on one rib of 32220.
- The 390/440 kN ratings are SKF catalogue 17000 values for the basic execution; SKF can revise internal geometry without changing the order number, so keep the catalogue version (PUB BU/P1 17000/1 EN, 2018) with the specification and re-verify for critical drives.
- SKF lists several executions of 32220 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 32220 designation when purchasing and match the execution to the mounting arrangement.
Frequently asked questions
What are the dimensions and catalogue data of 32220?
The SKF 32220 is a single-row tapered roller bearing with 100 mm bore, 180 mm outer diameter and 49 mm width (3.937 × 7.087 × 1.929 in) per ISO 355. From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 390 kN, C0 440 kN, fatigue load limit Pu 48 kN, reference speed 3,000 r/min, limiting speed 3,600 r/min, mass about 4950 g. It is an open, separable bearing with a pressed-steel cage.
How does the 32220 bore code work?
The last two digits of 32220 are bore code 20, so 20 × 5 = 100 mm bore. The 180 mm OD and 49 mm width come from the ISO 355 dimension-series plan, shared with other tapered bearings of the same code.
What do the 32220 series and basic execution designations mean?
The leading 3 marks a single-row tapered roller bearing; the second digit 22 is the ISO 355 series (heavy section). The SKF catalogue lists the ISO 355 dimension-series code after the bare number. A steeper-contact-angle variant (B suffix) is a different order number and is not interchangeable with the basic execution.
Can a single 32220 take axial load in both directions?
No — one single-row tapered roller bearing reacts thrust in one direction only, and under radial load its contact angle induces an axial force. Use two bearings as a matched pair: O (back-to-back) for a rigid, moment-resisting arrangement, X (face-to-face) where thermal expansion must be tolerated, or tandem where one-direction thrust is shared.
How does 32220 compare with a ball bearing of the same bore?
A tapered roller bearing has line contact and a steep contact angle: much higher combined axial-plus-radial capacity and shock resistance than a ball bearing of the same bore, at the cost of speed, one-direction thrust, mandatory pairing for reversing loads and a minimum axial load requirement. A ball bearing cannot be dropped into a combined-load 32220 position and vice versa — verify load direction, Fa/Fr ratio and speed before substituting.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.1 metric single-row TRB on 2026-09-28. Read our editorial & correction policy.