16056-MA bearing: complete specifications & equivalents
The 16056-MA is a ISO 15 radial bearing sized 280 x 420 x 44 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 280 mm |
| Outer diameter D | 420 mm |
| Width B | 44 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 | 335 kN |
| Fatigue load limit Pu | 7.5 kN |
| Reference speed (thermal) | 3000 rpm |
| Limiting speed (mechanical) | 2600 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 23500 g |
| Manufacturer designation | 16056 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 & 16000-series range
| Bore d | 11.024 in |
|---|---|
| Outer diameter D | 16.535 in |
| Width B | 1.732 in |
| ISO bore code | 56 |
| Radial section height (D−d)/2 | 70 mm |
| Smallest bore in 16000-series | 12 mm |
| Largest outer diameter in 16000-series | 560 mm |
| Width range across 16000-series | 7–57 mm |
| Bore position in 16000-series (smallest first) | 35 of 40 |
| Bore above smallest 16000-series size | 268 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 16056 | NTN | full Dimensions and internal design equivalent — standard interchange. | NTN counterpart NTN 16056 on the same 280×420×44 mm envelope with ratings within 10 % — interchange after checking seal, cage and precision details on both pages. |
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 16056-MA model number is decoded
In the 16000-series, the last two digits encode the bore: 16056 carries code 56 = 280 mm (code × 5). The envelope is 280×420×44 mm (11.024×16.535×1.732 in) with a 70.0 mm radial section height, C 242 kN, C0 335 kN and Pu 7.5 kN. The open 16056 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 2600 r/min, catalogue mass 23500 g. A thin section saves space but leaves little margin for misalignment or shaft deflection.
Typical equipment & failure modes
Common applications
- industrial fans and blowers
- mill and kiln auxiliaries
- pulp and paper machinery
- marine deck machinery
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
- Mount by heating the inner ring (max 120 °C) — driving 16056-MA home through the outer ring or balls brinells the raceways.
- Do not preload 16056-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 16056-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 23500 g quoted mass includes the heavier cage.
- Open 16056-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 16056-MA; run-to-failure on open deep-groove bearings is the dominant early-failure cause.
- Fillet radii must clear the 16056-MA chamfer so the 44 mm-wide ring seats square; an oversized shaft radius creates point contact on the ring face.
Frequently asked questions
What are the dimensions of 16056-MA?
The SKF 16056 MA measures 280 mm bore × 420 mm OD × 44 mm width (11.024 × 16.535 × 1.732 in), mass about 23500 g. It is open, with no shields or seals.
How does the bore code in 16056 work?
The final two digits of 16056 are bore code 56, multiplied by 5 to give 280 mm.
What load can 16056-MA take?
Catalogue values for 16056 MA: dynamic C 242 kN, static C0 335 kN, fatigue limit Pu 7.5 kN. Use C in life calculation and C0 for static checks at 280 mm bore.
What is the speed rating of 16056-MA?
SKF lists a 3000 r/min thermal reference speed and a 2600 r/min mechanical limiting speed for 16056 MA; real limits also depend on lubrication and fits.
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.