6220 bearing: complete specifications & equivalents
The 6220 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 / C3 available |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| 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) | 4800 rpm |
| Operating temperature | -40 to +150 °C |
| Mass | 3200 g |
| Manufacturer designation | SKF 6220 |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018) |
| Last verified | 2026-09-25 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018)) · extracted 2026-09-24
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 | ISO 15 | full Dimensions and internal design equivalent — standard interchange. | ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier. |
| 6220-2RS-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 100×180×34 mm envelope per ISO 15; seal variant differs (OPEN vs 2RS) — confirm sealing suits the duty. |
| 6220-NSK | NSK | 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. |
| 6220-RSR | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 100×180×34 mm envelope per ISO 15; seal variant differs (OPEN vs RSR) — confirm sealing suits the duty. |
| 6220-ZZ-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 100×180×34 mm envelope per ISO 15; seal variant differs (OPEN vs ZZ) — confirm sealing suits the duty. |
| 6220-2RS-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 100×180×34 mm envelope per ISO 15; seal variant differs (OPEN vs 2RS) — confirm sealing suits the duty. |
| 6220-NTN | NTN | 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. |
| 6220-RSR-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 100×180×34 mm envelope per ISO 15; seal variant differs (OPEN vs RSR) — confirm sealing suits the duty. |
| 6220-ZZ-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 100×180×34 mm envelope per ISO 15; seal variant differs (OPEN vs ZZ) — confirm sealing suits the duty. |
| 7220 | SKF | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | — |
| NU220 | SKF | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | — |
| 6220-M | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF 6220 M (machined brass cage, open arrangement) is the same-size execution on the 100×180×34 mm envelope with ratings within 10 % — boundary dimensions interchangeable. |
| 220 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF 220 shares the 100×180×34 mm envelope but catalogue C/C0 differ — envelope match only after a load check. |
| 220-ZZ | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF 220-2Z shares the 100×180×34 mm envelope but catalogue C/C0 differ — envelope match only after a load check. |
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 model number is decoded
6220 is supplied open, without shields or seals, so the arrangement around it must supply and retain the lubricant. Within the light 62xx section (diameter series 2 of ISO 15), multiplying bore code 20 by five gives the 100 mm bore; the 180 mm outside diameter and 34 mm width follow the same boundary-dimension plan. For a rotating inner ring on a 100 mm shaft under normal load, catalogue practice seats it on a k5 shaft fit with an H7 housing bore — confirm against the actual load direction and magnitude before committing. In the SKF catalogue this open execution carries the bare designation; protected variants are ordered separately as -2Z and -2RSH.
Typical equipment & failure modes
Common applications
- medium and heavy industrial drives
- large gearboxes
- industrial fans and blowers
- hoists and winches
Known failure patterns
- contamination wear from dust and dirt ingress through the open arrangement
- lubricant starvation when no regreasing interval is maintained
- electrical pitting in VFD-driven motors without grounding protection
- raceway smearing under marginal lubrication at start-up
Selection pitfalls — read before you substitute
- Large bores like the 100 mm of 6220 demand clean, burr-free seats; one raised burr under a ring this size cocks the bearing and concentrates load at the raceway edge, cutting life drastically.
- The 62xx light series is the default general-purpose section at 100 mm bore; before upgrading to a 6320 for extra capacity, confirm the housing accepts a 180 mm OD and 34 mm width — it is not a drop-in swap.
- Storage matters for open bearings: 6220 leaves the factory with rust preventive only, so clean it and apply the service grease at assembly even if the rings look oily from the wrapper.
- Open bearings tolerate the highest speeds in the 6200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 6220 units.
- Suffixes stack in a defined order — clearance follows the seal code, e.g. 6220-C3. No clearance suffix means normal CN clearance.
- The housing bore for the 180 mm OD should be round within IT7; an oval bore pinches the outer ring of 6220 and shows up later as two-point loaded raceway wear.
- The open 6220 needs external sealing and application-supplied lubrication; in the SKF catalogue the protected variants are separate order numbers 6220-2Z (shields) and 6220-2RSH (contact seals), not suffix-free 6220.
- The 127/93 kN ratings here are SKF Explorer-class figures from catalogue PUB BU/P1 17000/1 EN (Oct 2018); SKF can revise internal geometry and ratings without changing the designation, so treat the catalogue version and date as part of the specification and re-verify for critical drives.
Frequently asked questions
What are the dimensions of a 6220 bearing?
A 6220 deep-groove ball bearing has a 100 mm bore, 180 mm outer diameter and 34 mm width (3.937 × 7.087 × 1.339 in), per ISO 15 boundary dimensions. It is an open bearing with no seals or shields.
Are 6220 bearings from different brands interchangeable?
For boundary dimensions, yes: every brand's 6220 uses the same ISO 15 envelope (100×180×34 mm). Load ratings, limiting speeds, clearance, precision class and sealing design can differ, so verify those in the supplier catalogue when substituting.
What internal clearance does 6220 have?
Unless a clearance suffix says otherwise, 6220 is manufactured to normal (CN) radial internal clearance. Tight fits and hot shafts consume clearance in service — for those conditions order the C3 execution of 6220 and verify the residual clearance after mounting.
How should 6220 be mounted?
Apply the mounting force to the ring being fitted: on a 100 mm shaft seat the press load must pass through the inner-ring face only. Induction heating of the inner ring (max 120 °C) is the clean method at this size. Never strike the outer ring, the cage or the seals.
What is the SKF designation and catalogue data for 6220?
In the SKF Rolling Bearings catalogue this size is listed as 6220 — the open (unsealed) execution, 100×180×34 mm per ISO 15. Quoted values: C 127 kN, C0 93 kN, Pu 3.35 kN, limiting speed 4800 r/min, mass 3200 g. Brand suffixes (2Z, 2RSH, 2RSL) differ from the industry-neutral spelling 6220.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018) on 2026-09-25. Read our editorial & correction policy.