6020-M (brass cage) bearing: complete specifications & equivalents
The 6020-M is a ISO 15 radial bearing sized 100 x 150 x 24 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 | 150 mm |
| Width B | 24 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| 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) | 7500 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1450 g |
| Manufacturer designation | 6020 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 & 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 |
|---|---|---|---|
| 6020-2RS-NSK | NSK | full Dimensions and internal design equivalent — standard interchange. | NSK counterpart NSK 6020DDU on the same 100×150×24 mm envelope with ratings within 10 % — interchange after checking seal, cage and precision details on both pages. |
| 6020-RSR | NSK | full Dimensions and internal design equivalent — standard interchange. | NSK counterpart NSK 6020VV on the same 100×150×24 mm envelope with ratings within 10 % — interchange after checking seal, cage and precision details on both pages. |
| 6020-ZZ-NSK | NSK | full Dimensions and internal design equivalent — standard interchange. | NSK counterpart NSK 6020ZZ on the same 100×150×24 mm envelope with ratings within 10 % — interchange after checking seal, cage and precision details on both pages. |
| 6020-NSK | NSK | full Dimensions and internal design equivalent — standard interchange. | NSK counterpart NSK 6020 on the same 100×150×24 mm envelope with ratings within 10 % — interchange after checking seal, cage and precision details on both pages. |
| 6020 | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF SKF 6020 (open arrangement) shares the 100×150×24 mm envelope with ratings within 10 % — execution variant of the same size; boundary dimensions interchangeable. |
| 6020-ZZ | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF SKF 6020-2Z (two non-contact shields) shares the 100×150×24 mm envelope with ratings within 10 % — execution variant of the same size; boundary dimensions interchangeable. |
| 6020-2RS | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF SKF 6020-2RS1 (two contact elastomer seals) shares the 100×150×24 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 6020-M model number is decoded
In the 6000-series, the last two digits encode the bore: 6020 carries code 20 = 100 mm (code × 5). The envelope is 100×150×24 mm (3.937×5.906×0.945 in) with a 25.0 mm radial section height, C 63.7 kN, C0 54 kN and Pu 2.04 kN. The open 6020 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 7500 r/min, catalogue mass 1450 g.
Typical equipment & failure modes
Common applications
- industrial electric motors
- gearboxes and speed reducers
- centrifugal and positive-displacement pumps
- material-handling equipment
Known failure patterns
- contamination wear when the open arrangement is used without external seals
- lubricant starvation where no regreasing interval is maintained
- raceway smearing under marginal lubrication at start-up
- electrical pitting in VFD-driven motors without shaft grounding
Selection pitfalls — read before you substitute
- Clearance suffixes follow the seal code in the designation stack (e.g. 6020-2Z/C3 in SKF spelling); no suffix means normal CN internal clearance.
- Fillet radii must clear the 6020-M chamfer so the 24 mm-wide ring seats square; an oversized shaft radius creates point contact on the ring face.
- The M suffix on 6020-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 1450 g quoted mass includes the heavier cage.
- Open 6020-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 6020-M; run-to-failure on open deep-groove bearings is the dominant early-failure cause.
- At 100 mm bore, C3 clearance is the safe choice when interference fits plus temperature rise consume the CN clearance; a hot tight bearing with no residual clearance fails fast.
- SKF date-codes its packaging, and greased sealed or shielded bearings carry a finite shelf life: rotate stock first-in-first-out and store boxes dry, cool and away from vibration.
- A replacement 6020 should go onto inspected seats only: SKF mounting guidance calls for clean, burr-free journals within tolerance, since a large share of early failures traces back to damaged or worn seats.
Frequently asked questions
What are the dimensions of 6020-M?
The SKF 6020 M measures 100 mm bore × 150 mm OD × 24 mm width (3.937 × 5.906 × 0.945 in), mass about 1450 g. It is open, with no shields or seals.
How does the bore code in 6020 work?
The final two digits of 6020 are bore code 20, multiplied by 5 to give 100 mm.
Which fits should I use for 6020-M?
With a rotating inner ring use roughly k5 on the shaft and H7 in the 150 mm housing; reverse the interference if the outer ring rotates.
How heavy is 6020-M?
Catalogue mass is 1450 g for 6020 M; seal and cage executions of the same envelope differ by a few grams.
What internal clearance does 6020-M have?
Standard supply is normal CN radial clearance unless a suffix states otherwise; for tight fits or hot shafts SKF lists the C3 execution of the same size — the residual clearance left after mounting is what governs running life.
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.