6220-M bearing: complete specifications & equivalents
The 6220-M is a ISO 15 radial bearing sized 100 x 180 x 34 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 | 34 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 127 kN |
| Basic static load rating C0 | 93 kN |
| Fatigue load limit Pu | 3.35 kN |
| Reference speed (thermal) | 7500 rpm |
| Limiting speed (mechanical) | 7000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 3800 g |
| Manufacturer designation | 6220 M |
| 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 & 6200-series range
| Bore d | 3.937 in |
|---|---|
| Outer diameter D | 7.087 in |
| Width B | 1.339 in |
| ISO bore code | 20 |
| Radial section height (D−d)/2 | 40 mm |
| Smallest bore in 6200-series | 3 mm |
| Largest outer diameter in 6200-series | 540 mm |
| Width range across 6200-series | 2.5–85 mm |
| Bore position in 6200-series (smallest first) | 29 of 45 |
| Bore above smallest 6200-series size | 97 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 6220-RSR | NSK | full Dimensions and internal design equivalent — standard interchange. | NSK counterpart NSK 6220VV on the same 100×180×34 mm envelope with ratings within 10 % — interchange after checking seal, cage and precision details on both pages. |
| 220 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 100×180×34 mm envelope as SKF 220, but catalogue C/C0 differ (127/93 kN vs 134/140 kN) — envelope match only after a load check. |
| 220-ZZ | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 100×180×34 mm envelope as SKF 220-2Z, but catalogue C/C0 differ (127/93 kN vs 134/140 kN) — envelope match only after a load check. |
| 6220 | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF SKF 6220 (open arrangement) shares the 100×180×34 mm envelope with ratings within 10 % — execution variant of the same size; boundary dimensions interchangeable. |
| 6220-ZZ | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF SKF 6220-2Z (two non-contact shields) shares the 100×180×34 mm envelope with ratings within 10 % — execution variant of the same size; boundary dimensions interchangeable. |
| 6220-2RS | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF SKF 6220-2RS1 (two contact elastomer seals) shares the 100×180×34 mm envelope with ratings within 10 % — execution variant of the same size; boundary dimensions interchangeable. |
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 6220-M model number is decoded
In the 6200-series, the last two digits encode the bore: 6220 carries code 20 = 100 mm (code × 5). The envelope is 100×180×34 mm (3.937×7.087×1.339 in) with a 40.0 mm radial section height, C 127 kN, C0 93 kN and Pu 3.35 kN. The open 6220 M carries no shields or seals and relies on application lubrication and external sealing. The M suffix identifies the machined brass cage execution, a separate order number from the pressed-steel version. Limiting speed 7000 r/min, catalogue mass 3800 g.
Typical equipment & failure modes
Common applications
- centrifugal and positive-displacement pumps
- material-handling equipment
- industrial fans
- compressor drives
Known failure patterns
- contamination wear when the open arrangement is used without external seals
- lubricant starvation where no regreasing interval is maintained
- fretting corrosion on a creeping shaft or housing seat
- cage damage from running beyond the limiting speed
Selection pitfalls — read before you substitute
- Mount by heating the inner ring (max 120 °C) — driving 6220-M home through the outer ring or balls brinells the raceways.
- Mount by heating the inner ring (max 120 °C) — driving 6220-M home through the outer ring or balls brinells the raceways.
- The M suffix on 6220-M denotes a machined brass cage: it is the choice for high speeds, marginal lubrication and shock/vibration duty, and it is temperature-tolerant where polymer cages are not — the 3800 g quoted mass includes the heavier cage.
- Open 6220-M needs external sealing at the arrangement level; in dusty housings its life depends entirely on those external seals and the regreasing schedule.
- Plan a relubrication interval for 6220-M; run-to-failure on open deep-groove bearings is the dominant early-failure cause.
- Assign interference to the rotating ring: on a conventional shaft-mounted 100 mm position the inner ring rotates, so use a k5/m6 shaft seat with an H7 housing — reverse the logic if the outer ring rotates.
Frequently asked questions
What are the dimensions of 6220-M?
The SKF 6220 M measures 100 mm bore × 180 mm OD × 34 mm width (3.937 × 7.087 × 1.339 in), mass about 3800 g. It is open, with no shields or seals.
How does the bore code in 6220 work?
The final two digits of 6220 are bore code 20, multiplied by 5 to give 100 mm.
What is the difference between 6220-M and a same-bore 62-series bearing?
Section height differs: 6220-M has a 40 mm radial section and C 127 kN; always match d, D and B — same bore alone never makes two bearings interchangeable.
Which fits should I use for 6220-M?
With a rotating inner ring use roughly k5 on the shaft and H7 in the 180 mm housing; reverse the interference if the outer ring rotates.
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.