6084-M bearing: complete specifications & equivalents
The 6084-M is a ISO 15 radial bearing sized 420 x 620 x 90 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 420 mm |
| Outer diameter D | 620 mm |
| Width B | 90 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 507 kN |
| Basic static load rating C0 | 880 kN |
| Fatigue load limit Pu | 16.3 kN |
| Reference speed (thermal) | 2000 rpm |
| Limiting speed (mechanical) | 1600 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 91500 g |
| Manufacturer designation | 6084 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 | 16.535 in |
|---|---|
| Outer diameter D | 24.409 in |
| Width B | 3.543 in |
| ISO bore code | 84 |
| Radial section height (D−d)/2 | 100 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) | 49 of 61 |
| Bore above smallest 6000-series size | 416 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 6084 | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | NTN bearing NTN 6084 on the same 420×620×90 mm envelope, but catalogue C/C0 differ (507/880 kN vs 590/895 kN) — envelope interchange 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 6084-M model number is decoded
In the 6000-series, the last two digits encode the bore: 6084 carries code 84 = 420 mm (code × 5). The envelope is 420×620×90 mm (16.535×24.409×3.543 in) with a 100.0 mm radial section height, C 507 kN, C0 880 kN and Pu 16.3 kN. The open 6084 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 1600 r/min, catalogue mass 91500 g.
Typical equipment & failure modes
Common applications
- mill and kiln auxiliaries
- pulp and paper machinery
- marine deck machinery
- crusher auxiliary drives
Known failure patterns
- contamination wear when the open arrangement is used without external seals
- lubricant starvation where no regreasing interval is maintained
- edge loading from shaft deflection or housing misalignment
- rolling-contact fatigue spalling once the catalogue L10 life is exceeded
Selection pitfalls — read before you substitute
- Fillet radii must clear the 6084-M chamfer so the 90 mm-wide ring seats square; an oversized shaft radius creates point contact on the ring face.
- Do not preload 6084-M to silence it: a deep-groove ball bearing is not angular-contact, and axial preload only raises temperature and shortens grease life.
- The M suffix on 6084-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 91500 g quoted mass includes the heavier cage.
- Open 6084-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 6084-M; run-to-failure on open deep-groove bearings is the dominant early-failure cause.
- The fatigue load limit is 16.3 kN; it feeds the equivalent-mean-load check, not the basic life calculation — do not substitute one for the other.
Frequently asked questions
What are the dimensions of 6084-M?
The SKF 6084 M measures 420 mm bore × 620 mm OD × 90 mm width (16.535 × 24.409 × 3.543 in), mass about 91500 g. It is open, with no shields or seals.
How does the bore code in 6084 work?
The final two digits of 6084 are bore code 84, multiplied by 5 to give 420 mm.
What is the speed rating of 6084-M?
SKF lists a 2000 r/min thermal reference speed and a 1600 r/min mechanical limiting speed for 6084 M; real limits also depend on lubrication and fits.
What is the difference between 6084-M and a same-bore 62-series bearing?
Section height differs: 6084-M has a 100 mm radial section and C 507 kN; always match d, D and B — same bore alone never makes two bearings interchangeable.
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.