6030-M (brass cage) bearing: complete specifications & equivalents
The 6030-M is a ISO 15 radial bearing sized 150 x 225 x 35 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 150 mm |
| Outer diameter D | 225 mm |
| Width B | 35 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 125 kN |
| Basic static load rating C0 | 125 kN |
| Fatigue load limit Pu | 3.9 kN |
| Reference speed (thermal) | 6000 rpm |
| Limiting speed (mechanical) | 5000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 4900 g |
| Manufacturer designation | 6030 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 | 5.906 in |
|---|---|
| Outer diameter D | 8.858 in |
| Width B | 1.378 in |
| ISO bore code | 30 |
| Radial section height (D−d)/2 | 37.5 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) | 33 of 61 |
| Bore above smallest 6000-series size | 146 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 6030-FAG | FAG | full Dimensions and internal design equivalent — standard interchange. | FAG counterpart FAG 6030 on the same 150×225×35 mm envelope with ratings within 10 % — interchange after checking seal, cage and precision details on both pages. |
| 6030-2RS-FAG | FAG | full Dimensions and internal design equivalent — standard interchange. | FAG counterpart FAG 6030-2RSR on the same 150×225×35 mm envelope with ratings within 10 % — interchange after checking seal, cage and precision details on both pages. |
| 6030-ZZ-FAG | FAG | full Dimensions and internal design equivalent — standard interchange. | FAG counterpart FAG 6030-2Z on the same 150×225×35 mm envelope with ratings within 10 % — interchange after checking seal, cage and precision details on both pages. |
| 6030-2RS-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | NSK bearing NSK 6030DDU on the same 150×225×35 mm envelope, but catalogue C/C0 differ (125/125 kN vs 138/126 kN) — envelope interchange only after a load check. |
| 6030-RSR | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | NSK bearing NSK 6030VV on the same 150×225×35 mm envelope, but catalogue C/C0 differ (125/125 kN vs 138/126 kN) — envelope interchange only after a load check. |
| 6030-ZZ-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | NSK bearing NSK 6030ZZ on the same 150×225×35 mm envelope, but catalogue C/C0 differ (125/125 kN vs 138/126 kN) — envelope interchange only after a load check. |
| 6030-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | NSK bearing NSK 6030 on the same 150×225×35 mm envelope, but catalogue C/C0 differ (125/125 kN vs 138/126 kN) — envelope interchange only after a load check. |
| 6030-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | NTN bearing 6030 on the same 150×225×35 mm envelope, but catalogue C/C0 differ (125/125 kN vs 139/126 kN) — envelope interchange only after a load check. |
| 6030-2RS-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | NTN bearing 6030LLU on the same 150×225×35 mm envelope, but catalogue C/C0 differ (125/125 kN vs 139/126 kN) — envelope interchange only after a load check. |
| 6030-ZZ-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | NTN bearing 6030ZZ on the same 150×225×35 mm envelope, but catalogue C/C0 differ (125/125 kN vs 139/126 kN) — envelope interchange only after a load check. |
| 6030 | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF SKF 6030 (open arrangement) shares the 150×225×35 mm envelope with ratings within 10 % — execution variant of the same size; boundary dimensions interchangeable. |
| 6030-2RS | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF SKF 6030-2RS1 (two contact elastomer seals) shares the 150×225×35 mm envelope with ratings within 10 % — execution variant of the same size; boundary dimensions interchangeable. |
| 6030-ZZ | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF SKF 6030-2Z (two non-contact shields) shares the 150×225×35 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 6030-M model number is decoded
In the 6000-series, the last two digits encode the bore: 6030 carries code 30 = 150 mm (code × 5). The envelope is 150×225×35 mm (5.906×8.858×1.378 in) with a 37.5 mm radial section height, C 125 kN, C0 125 kN and Pu 3.9 kN. The open 6030 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 5000 r/min, catalogue mass 4900 g.
Typical equipment & failure modes
Common applications
- pulp and paper machinery
- marine deck machinery
- crusher auxiliary drives
- large industrial gearboxes
Known failure patterns
- contamination wear when the open arrangement is used without external seals
- lubricant starvation where no regreasing interval is maintained
- rolling-contact fatigue spalling once the catalogue L10 life is exceeded
- brinelling from static overload or hammer blows during mounting
Selection pitfalls — read before you substitute
- Fillet radii must clear the 6030-M chamfer so the 35 mm-wide ring seats square; an oversized shaft radius creates point contact on the ring face.
- Deep-groove geometry tolerates only minutes of misalignment; if the 225 mm housing bore cannot be aligned, move to a self-aligning bearing rather than shimming 6030-M.
- The M suffix on 6030-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 4900 g quoted mass includes the heavier cage.
- Open 6030-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 6030-M; run-to-failure on open deep-groove bearings is the dominant early-failure cause.
- The fatigue load limit is 3.9 kN; it feeds the equivalent-mean-load check, not the basic life calculation — do not substitute one for the other.
- Where two 6030 bearings share one shaft in a preloaded or matched arrangement, order both from the same production lot; catalogue figures describe a single bearing, not a matched set.
- For positions that need relubrication, choose the open execution of 6030 and design the housing with a grease path; shielded and sealed versions are intended as fit-and-forget units.
Frequently asked questions
What are the dimensions of 6030-M?
The SKF 6030 M measures 150 mm bore × 225 mm OD × 35 mm width (5.906 × 8.858 × 1.378 in), mass about 4900 g. It is open, with no shields or seals.
How does the bore code in 6030 work?
The final two digits of 6030 are bore code 30, multiplied by 5 to give 150 mm.
How heavy is 6030-M?
Catalogue mass is 4900 g for 6030 M; seal and cage executions of the same envelope differ by a few grams.
What internal clearance does 6030-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.
How long can a greased 6030-M be stored?
Sealed and shielded SKF units carry a finite grease shelf life: SKF recommends first-in-first-out stock rotation and dry, cool, vibration-free storage. Open units ship with rust preventive only and are greased at assembly.
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.