61876-MA bearing: complete specifications & equivalents
The 61876-MA is a ISO 15 radial bearing sized 380 x 480 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 | 380 mm |
| Outer diameter D | 480 mm |
| Width B | 46 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 242 kN |
| Basic static load rating C0 | 390 kN |
| Fatigue load limit Pu | 8 kN |
| Reference speed (thermal) | 2400 rpm |
| Limiting speed (mechanical) | 2000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 20000 g |
| Manufacturer designation | 61876 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 | 14.961 in |
|---|---|
| Outer diameter D | 18.898 in |
| Width B | 1.811 in |
| ISO bore code | 76 |
| 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) | 51 of 74 |
| Bore above smallest 61800-series size | 379 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 61876 | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | NTN bearing NTN 6876 on the same 380×480×46 mm envelope, but catalogue C/C0 differ (242/390 kN vs 256/340 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 61876-MA model number is decoded
In the 61800-series, the last two digits encode the bore: 61876 carries code 76 = 380 mm (code × 5). The envelope is 380×480×46 mm (14.961×18.898×1.811 in) with a 50.0 mm radial section height, C 242 kN, C0 390 kN and Pu 8 kN. The open 61876 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 2000 r/min, catalogue mass 20000 g. A thin section saves space but leaves little margin for misalignment or shaft deflection.
Typical equipment & failure modes
Common applications
- clutch and transmission assemblies
- robotics and automation joints
- lay shafts and idler shafts
- textile and packaging machinery
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
- Assign interference to the rotating ring: on a conventional shaft-mounted 380 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.
- Do not preload 61876-MA to silence it: a deep-groove ball bearing is not angular-contact, and axial preload only raises temperature and shortens grease life.
- The MA suffix on 61876-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 20000 g quoted mass includes the heavier cage.
- Open 61876-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 61876-MA; run-to-failure on open deep-groove bearings is the dominant early-failure cause.
- Do not preload 61876-MA to silence it: a deep-groove ball bearing is not angular-contact, and axial preload only raises temperature and shortens grease life.
Frequently asked questions
What are the dimensions of 61876-MA?
The SKF 61876 MA measures 380 mm bore × 480 mm OD × 46 mm width (14.961 × 18.898 × 1.811 in), mass about 20000 g. It is open, with no shields or seals.
How does the bore code in 61876 work?
The final two digits of 61876 are bore code 76, multiplied by 5 to give 380 mm.
What is the speed rating of 61876-MA?
SKF lists a 2400 r/min thermal reference speed and a 2000 r/min mechanical limiting speed for 61876 MA; real limits also depend on lubrication and fits.
What is the difference between 61876-MA and a same-bore 62-series bearing?
Section height differs: 61876-MA has a 50 mm radial section and C 242 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.