6020-ZZ bearing: complete specifications & equivalents
The 6020-ZZ is a ISO 15 radial bearing sized 100 x 150 x 24 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 | 150 mm |
| Width B | 24 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 | 63.7 kN |
| Basic static load rating C0 | 54 kN |
| Fatigue load limit Pu | 2.04 kN |
| Reference speed (thermal) | 9500 rpm |
| Limiting speed (mechanical) | 4500 rpm |
| Operating temperature | -30 to +120 °C |
| Mass | 1300 g |
| Manufacturer designation | SKF 6020-2Z |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018) |
| Last verified | 2026-09-24 |
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 & 6000-series range
| Bore d | 3.937 in |
|---|---|
| Outer diameter D | 5.906 in |
| Width B | 0.945 in |
| ISO bore code | 20 |
| Radial section height (D−d)/2 | 25 mm |
| Smallest bore in 6000-series | 4 mm |
| Largest outer diameter in 6000-series | 1150 mm |
| Width range across 6000-series | 4–155 mm |
| Bore position in 6000-series (smallest first) | 27 of 61 |
| Bore above smallest 6000-series size | 96 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 6020 | 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. |
| 6020-2RS-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 100×150×24 mm envelope per ISO 15; seal variant differs (ZZ vs 2RS) — confirm sealing suits the duty. |
| 6020-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 100×150×24 mm envelope per ISO 15; seal variant differs (ZZ vs OPEN) — confirm sealing suits the duty. |
| 6020-RSR | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 100×150×24 mm envelope per ISO 15; seal variant differs (ZZ vs RSR) — confirm sealing suits the duty. |
| 6020-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. |
| 6020-M | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF 6020 M (machined brass cage, open arrangement) is the same-size execution on the 100×150×24 mm envelope with ratings within 10 % — 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 6020-ZZ model number is decoded
6020-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 extra-light 60xx section (diameter series 0 of ISO 15), multiplying bore code 20 by five gives the 100 mm bore; the 150 mm outside diameter and 24 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 6020-2Z.
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
- edge loading from shaft deflection or housing misalignment
- rolling-contact fatigue spalling after the rated L10 life is exceeded
Selection pitfalls — read before you substitute
- At 100 mm bore the ring mass is significant: heat 6020 on an induction heater (max 120 °C), never over an open flame, and plan puller access or a withdrawal sleeve now for the day it has to come off again.
- Choosing the 60xx extra-light section saves radial space at 100 mm bore, but the trade-off is rating: if the drive sees shock or frequent start-stop cycles, re-check the L10 life against a 6220 before committing to the smaller envelope.
- Do not wash 6020-ZZ in solvent before mounting: the grease inside the shielded cavity is the service fill, and solvent creeping past the shield gap strips it out.
- Shielded 6020-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.
- Suffixes stack in a defined order — clearance follows the seal code, e.g. 6020-C3. No clearance suffix means normal CN clearance.
- The housing bore for the 150 mm OD should be round within IT7; an oval bore pinches the outer ring of 6020-ZZ and shows up later as two-point loaded raceway wear.
- SKF spells the shielded version 6020-2Z (one shield: 6020-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 6020-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 6020-2Z for high-contamination positions.
- The 63.7/54 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 6020-ZZ bearing?
A 6020-ZZ deep-groove ball bearing has a 100 mm bore, 150 mm outer diameter and 24 mm width (3.937 × 5.906 × 0.945 in), per ISO 15 boundary dimensions. It is fitted with two non-contact metallic shields.
How does the 6000 compare with other series at the same 100 mm bore?
The second digit is the diameter series: 60 is the smallest standard section (150×24 mm, 25.0 mm radial section) at 100 mm bore — below 62/63/64 in load capacity, for light loads in compact spaces.
Are 6020 bearings from different brands interchangeable?
For boundary dimensions, yes: every brand's 6020 uses the same ISO 15 envelope (100×150×24 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 6020-ZZ have?
Unless a clearance suffix says otherwise, 6020-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 6020 and verify the residual clearance after mounting.
What is the SKF designation and catalogue data for 6020-ZZ?
In the SKF Rolling Bearings catalogue this size is listed as 6020-2Z — two non-contact sheet-metal shields, 100×150×24 mm per ISO 15. Quoted values: C 63.7 kN, C0 54 kN, Pu 2.04 kN, limiting speed 4500 r/min, mass 1300 g. Brand suffixes (2Z, 2RSH, 2RSL) differ from the industry-neutral spelling 6020-ZZ.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018) on 2026-09-24. Read our editorial & correction policy.