6034-M (brass cage) bearing: complete specifications & equivalents
The 6034-M is a ISO 15 radial bearing sized 170 x 260 x 42 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 170 mm |
| Outer diameter D | 260 mm |
| Width B | 42 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 168 kN |
| Basic static load rating C0 | 173 kN |
| Fatigue load limit Pu | 5 kN |
| Reference speed (thermal) | 5300 rpm |
| Limiting speed (mechanical) | 4300 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 8150 g |
| Manufacturer designation | 6034 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 | 6.693 in |
|---|---|
| Outer diameter D | 10.236 in |
| Width B | 1.654 in |
| ISO bore code | 34 |
| Radial section height (D−d)/2 | 45 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) | 35 of 61 |
| Bore above smallest 6000-series size | 166 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 6034-FAG | FAG | full Dimensions and internal design equivalent — standard interchange. | FAG counterpart FAG 6034 on the same 170×260×42 mm envelope with ratings within 10 % — interchange after checking seal, cage and precision details on both pages. |
| 6034-2RS | FAG | full Dimensions and internal design equivalent — standard interchange. | FAG counterpart FAG 6034-2RSR on the same 170×260×42 mm envelope with ratings within 10 % — interchange after checking seal, cage and precision details on both pages. |
| 6034-RSR | NSK | full Dimensions and internal design equivalent — standard interchange. | NSK counterpart NSK 6034VV on the same 170×260×42 mm envelope with ratings within 10 % — interchange after checking seal, cage and precision details on both pages. |
| 6034-ZZ | NSK | full Dimensions and internal design equivalent — standard interchange. | NSK counterpart NSK 6034ZZ on the same 170×260×42 mm envelope with ratings within 10 % — interchange after checking seal, cage and precision details on both pages. |
| 6034-NSK | NSK | full Dimensions and internal design equivalent — standard interchange. | NSK counterpart NSK 6034 on the same 170×260×42 mm envelope with ratings within 10 % — interchange after checking seal, cage and precision details on both pages. |
| 6034-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | NTN bearing 6034 on the same 170×260×42 mm envelope, but catalogue C/C0 differ (168/173 kN vs 187/172 kN) — envelope interchange only after a load check. |
| 6034-ZZ-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | NTN bearing 6034ZZ on the same 170×260×42 mm envelope, but catalogue C/C0 differ (168/173 kN vs 187/172 kN) — envelope interchange only after a load check. |
| 6034 | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF SKF 6034 (open arrangement) shares the 170×260×42 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 6034-M model number is decoded
In the 6000-series, the last two digits encode the bore: 6034 carries code 34 = 170 mm (code × 5). The envelope is 170×260×42 mm (6.693×10.236×1.654 in) with a 45.0 mm radial section height, C 168 kN, C0 173 kN and Pu 5 kN. The open 6034 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 4300 r/min, catalogue mass 8150 g.
Typical equipment & failure modes
Common applications
- heavy conveyor drives
- hoists and winches
- industrial fans and blowers
- mill and kiln auxiliaries
Known failure patterns
- contamination wear when the open arrangement is used without external seals
- lubricant starvation where no regreasing interval is maintained
- cage damage from running beyond the limiting speed
- raceway smearing under marginal lubrication at start-up
Selection pitfalls — read before you substitute
- At 170 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.
- Fillet radii must clear the 6034-M chamfer so the 42 mm-wide ring seats square; an oversized shaft radius creates point contact on the ring face.
- The M suffix on 6034-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 8150 g quoted mass includes the heavier cage.
- Open 6034-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 6034-M; run-to-failure on open deep-groove bearings is the dominant early-failure cause.
- Clearance suffixes follow the seal code in the designation stack (e.g. 6034-2Z/C3 in SKF spelling); no suffix means normal CN internal clearance.
- Sealed SKF units are filled with a lithium-based grease for general service; food-grade, low-temperature and high-temperature fills are order options and are not field-interchangeable once the unit is sealed.
- Where two 6034 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.
Frequently asked questions
What are the dimensions of 6034-M?
The SKF 6034 M measures 170 mm bore × 260 mm OD × 42 mm width (6.693 × 10.236 × 1.654 in), mass about 8150 g. It is open, with no shields or seals.
How does the bore code in 6034 work?
The final two digits of 6034 are bore code 34, multiplied by 5 to give 170 mm.
How heavy is 6034-M?
Catalogue mass is 8150 g for 6034 M; seal and cage executions of the same envelope differ by a few grams.
What internal clearance does 6034-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 6034-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.