61880-MA bearing: complete specifications & equivalents
The 61880-MA is a ISO 15 radial bearing sized 400 x 500 x 46 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 400 mm |
| Outer diameter D | 500 mm |
| Width B | 46 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 247 kN |
| Basic static load rating C0 | 405 kN |
| Fatigue load limit Pu | 8.15 kN |
| Reference speed (thermal) | 2400 rpm |
| Limiting speed (mechanical) | 1900 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 20500 g |
| Manufacturer designation | 61880 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 & 61800-series range
| Bore d | 15.748 in |
|---|---|
| Outer diameter D | 19.685 in |
| Width B | 1.811 in |
| ISO bore code | 80 |
| Radial section height (D−d)/2 | 50 mm |
| Smallest bore in 61800-series | 1 mm |
| Largest outer diameter in 61800-series | 1820 mm |
| Width range across 61800-series | 1–140 mm |
| Bore position in 61800-series (smallest first) | 52 of 74 |
| Bore above smallest 61800-series size | 399 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 61880 | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | NTN bearing NTN 6880 on the same 400×500×46 mm envelope, but catalogue C/C0 differ (247/405 kN vs 251/340 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 61880-MA model number is decoded
In the 61800-series, the last two digits encode the bore: 61880 carries code 80 = 400 mm (code × 5). The envelope is 400×500×46 mm (15.748×19.685×1.811 in) with a 50.0 mm radial section height, C 247 kN, C0 405 kN and Pu 8.15 kN. The open 61880 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 1900 r/min, catalogue mass 20500 g. A thin section saves space but leaves little margin for misalignment or shaft deflection.
Typical equipment & failure modes
Common applications
- textile and packaging machinery
- slew and indexing drives
- large industrial gearboxes
- heavy conveyor drives
Known failure patterns
- contamination wear when the open arrangement is used without external seals
- lubricant starvation where no regreasing interval is maintained
- fretting corrosion on a creeping shaft or housing seat
- cage damage from running beyond the limiting speed
Selection pitfalls — read before you substitute
- Deep-groove geometry tolerates only minutes of misalignment; if the 500 mm housing bore cannot be aligned, move to a self-aligning bearing rather than shimming 61880-MA.
- Assign interference to the rotating ring: on a conventional shaft-mounted 400 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.
- The MA suffix on 61880-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 20500 g quoted mass includes the heavier cage.
- Open 61880-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 61880-MA; run-to-failure on open deep-groove bearings is the dominant early-failure cause.
- Mount by heating the inner ring (max 120 °C) — driving 61880-MA home through the outer ring or balls brinells the raceways.
Frequently asked questions
What are the dimensions of 61880-MA?
The SKF 61880 MA measures 400 mm bore × 500 mm OD × 46 mm width (15.748 × 19.685 × 1.811 in), mass about 20500 g. It is open, with no shields or seals.
How does the bore code in 61880 work?
The final two digits of 61880 are bore code 80, multiplied by 5 to give 400 mm.
Which fits should I use for 61880-MA?
With a rotating inner ring use roughly m6 on the shaft and H7 in the 500 mm housing; reverse the interference if the outer ring rotates.
How heavy is 61880-MA?
Catalogue mass is 20500 g for 61880 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.