619-670-MA bearing: complete specifications & equivalents
The 619-670-MA is a ISO 15 radial bearing sized 670 x 900 x 103 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 | 900 mm |
| Width B | 103 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 676 kN |
| Basic static load rating C0 | 1500 kN |
| Fatigue load limit Pu | 22.4 kN |
| Reference speed (thermal) | 1200 rpm |
| Limiting speed (mechanical) | 1000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 192000 g |
| Manufacturer designation | 619/670 MA |
| 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 & 61900-series range
| Bore d | 26.378 in |
|---|---|
| Outer diameter D | 35.433 in |
| Width B | 4.055 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 115 mm |
| Smallest bore in 61900-series | 3 mm |
| Largest outer diameter in 61900-series | 1120 mm |
| Width range across 61900-series | 3–118 mm |
| Bore position in 61900-series (smallest first) | 59 of 63 |
| Bore above smallest 61900-series size | 667 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the 619-670-MA model number is decoded
In the large-bore 61900-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 670×900×103 mm (26.378×35.433×4.055 in) with a 115.0 mm radial section height, C 676 kN, C0 1500 kN and Pu 22.4 kN. The open 619/670 MA carries no shields or seals and relies on application lubrication and external sealing. The MA suffix identifies the machined brass cage execution, a separate order number from the pressed-steel version. Limiting speed 1000 r/min, catalogue mass 192000 g. A thin section saves space but leaves little margin for misalignment or shaft deflection.
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
- false brinelling from vibration while the shaft stands idle
- fretting corrosion on a creeping shaft or housing seat
Selection pitfalls — read before you substitute
- The fatigue load limit is 22.4 kN; it feeds the equivalent-mean-load check, not the basic life calculation — do not substitute one for the other.
- Fillet radii must clear the 619-670-MA chamfer so the 103 mm-wide ring seats square; an oversized shaft radius creates point contact on the ring face.
- The MA suffix on 619-670-MA 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 192000 g quoted mass includes the heavier cage.
- Open 619-670-MA 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 619-670-MA; run-to-failure on open deep-groove bearings is the dominant early-failure cause.
- Assign interference to the rotating ring: on a conventional shaft-mounted 670 mm position the inner ring rotates, so use a k5/m6 shaft seat with an H7 housing — reverse the logic if the outer ring rotates.
Frequently asked questions
What are the dimensions of 619-670-MA?
The SKF 619/670 MA measures 670 mm bore × 900 mm OD × 103 mm width (26.378 × 35.433 × 4.055 in), mass about 192000 g. It is open, with no shields or seals.
Why is there a slash in the designation 619/670 MA?
The slash writes a bore that falls outside the two-digit code table: 619/670 means 670 mm bore. The site slug 619-670-MA replaces the slash with a hyphen.
Which fits should I use for 619-670-MA?
With a rotating inner ring use roughly m6 on the shaft and H7 in the 900 mm housing; reverse the interference if the outer ring rotates.
How heavy is 619-670-MA?
Catalogue mass is 192000 g for 619/670 MA; seal and cage executions of the same envelope differ by a few grams.
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.