60-670-N1MAS bearing: complete specifications & equivalents
The 60-670-N1MAS is a ISO 15 radial bearing sized 670 x 980 x 136 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 670 mm |
| Outer diameter D | 980 mm |
| Width B | 136 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 904 kN |
| Basic static load rating C0 | 2040 kN |
| Fatigue load limit Pu | 30 kN |
| Reference speed (thermal) | 1100 rpm |
| Limiting speed (mechanical) | 900 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 345000 g |
| Manufacturer designation | 60/670 N1MAS |
| 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 | 26.378 in |
|---|---|
| Outer diameter D | 38.583 in |
| Width B | 5.354 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 155 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) | 58 of 61 |
| Bore above smallest 6000-series size | 666 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the 60-670-N1MAS model number is decoded
In the large-bore 6000-series, the bore is written directly after the slash as 670 mm (large thin-section bores use the slash spelling instead of the two-digit code). The envelope is 670×980×136 mm (26.378×38.583×5.354 in) with a 155.0 mm radial section height, C 904 kN, C0 2040 kN and Pu 30 kN. The open 60/670 N1MAS carries no shields or seals and relies on application lubrication and external sealing. The N1MAS suffix identifies the machined brass cage execution (special cage variant for this large thin-section size), a separate order number from the pressed-steel version. Limiting speed 900 r/min, catalogue mass 345000 g.
Typical equipment & failure modes
Common applications
- crusher auxiliary drives
- space-constrained gearboxes
- clutch and transmission assemblies
- robotics and automation joints
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
- The fatigue load limit is 30 kN; it feeds the equivalent-mean-load check, not the basic life calculation — do not substitute one for the other.
- Mount by heating the inner ring (max 120 °C) — driving 60-670-N1MAS home through the outer ring or balls brinells the raceways.
- The N1MAS execution of 60-670-N1MAS is a special machined-brass cage variant listed in catalogue 17000 for the largest thin-section sizes; confirm the exact cage feature set with SKF when ordering and servicing.
- The N1MAS suffix on 60-670-N1MAS 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 345000 g quoted mass includes the heavier cage.
- Open 60-670-N1MAS 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 60-670-N1MAS; run-to-failure on open deep-groove bearings is the dominant early-failure cause.
Frequently asked questions
What are the dimensions of 60-670-N1MAS?
The SKF 60/670 N1MAS measures 670 mm bore × 980 mm OD × 136 mm width (26.378 × 38.583 × 5.354 in), mass about 345000 g. It is open, with no shields or seals.
Why is there a slash in the designation 60/670 N1MAS?
The slash writes a bore that falls outside the two-digit code table: 60/670 means 670 mm bore. The site slug 60-670-N1MAS replaces the slash with a hyphen.
What is the speed rating of 60-670-N1MAS?
SKF lists a 1100 r/min thermal reference speed and a 900 r/min mechanical limiting speed for 60/670 N1MAS; real limits also depend on lubrication and fits.
What is the difference between 60-670-N1MAS and a same-bore 62-series bearing?
Section height differs: 60-670-N1MAS has a 155 mm radial section and C 904 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.