6220-ZZ bearing: complete specifications & equivalents
The 6220-ZZ is a ISO 15 radial bearing sized 100 x 180 x 34 mm (bore x OD x width) with ZZ sealing. 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 | ZZ |
| 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) | 3800 rpm |
| Operating temperature | -30 to +120 °C |
| Mass | 3300 g |
| Manufacturer designation | SKF 6220-2Z |
| 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 | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting. |
| 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 (ZZ vs 2RS) — confirm sealing suits the duty. |
| 6220-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 100×180×34 mm envelope per ISO 15; seal variant differs (ZZ vs OPEN) — confirm sealing suits the duty. |
| 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 (ZZ vs RSR) — confirm sealing suits the duty. |
| 6220-ZZ-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. |
| 6220-2RS-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 100×180×34 mm envelope per ISO 15; seal variant differs (ZZ vs 2RS) — confirm sealing suits the duty. |
| 6220-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 100×180×34 mm envelope per ISO 15; seal variant differs (ZZ vs OPEN) — confirm sealing suits the duty. |
| 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 (ZZ vs RSR) — confirm sealing suits the duty. |
| 6220-ZZ-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. |
| 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-ZZ model number is decoded
6220-ZZ carries two non-contact sheet-steel shields that hold the factory grease in and keep coarse debris out; they do not seal against liquids. 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. SKF's own suffix is 2Z (this page's industry-neutral spelling is -ZZ); catalogue number 6220-2Z.
Typical equipment & failure modes
Common applications
- heavy conveyors
- pulp and paper machinery
- medium and heavy industrial drives
- large gearboxes
Known failure patterns
- fine-particle abrasion when non-contact shields let dust past in dirty duty
- grease aging in the shield-for-life cavity with no relubrication path
- brinelling from static overload or hammering during mounting
- false brinelling from vibration while the shaft is stationary
Selection pitfalls — read before you substitute
- Mount this 100 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.
- 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.
- ZZ shields are non-contact: 6220-ZZ blocks chips and coarse dust but is not waterproof — do not install it expecting a pressure-wash seal, step up to 6220-2RS for that.
- Shielded 6220-ZZ units are typically greased for life; prying the shields out for regreasing usually bends them and leaves a gap that throws grease in service.
- Assign fits by which ring rotates: an interference shaft fit for a rotating inner ring; if the outer ring rotates instead, reverse the logic — a loose rotating ring creeps and frets its seat.
- Measure the shaft, do not trust the drawing: a 100 mm nominal journal worn by even 0.02 mm turns an interference seat into a creeping fit that frets the bore of 6220-ZZ.
- SKF spells the shielded version 6220-2Z (one shield: 6220-Z), not "-ZZ": the suffix language differs by brand even though the ISO envelope is identical, so quote the brand designation when ordering.
- The single-shield execution 6220-Z is a distinct order number in catalogue 17000: it suits open gears or oil-bath arrangements where the unshielded face faces the lubricant, and it is not interchangeable with the double-shield 6220-2Z for high-contamination positions.
- 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-ZZ bearing?
A 6220-ZZ 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 fitted with two non-contact metallic 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. Seal suffixes also differ by brand (2RS, DDU, LLU, 2RSL and similar).
What internal clearance does 6220-ZZ have?
Unless a clearance suffix says otherwise, 6220-ZZ 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-ZZ 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-ZZ?
In the SKF Rolling Bearings catalogue this size is listed as 6220-2Z — two non-contact sheet-metal shields, 100×180×34 mm per ISO 15. Quoted values: C 127 kN, C0 93 kN, Pu 3.35 kN, limiting speed 3800 r/min, mass 3300 g. Brand suffixes (2Z, 2RSH, 2RSL) differ from the industry-neutral spelling 6220-ZZ.
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.