NNCL4856-CV bearing: complete specifications & equivalents
The NNCL4856-CV is a ISO 15 radial bearing sized 280 x 350 x 69 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 | 350 mm |
| Width B | 69 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | none |
| Basic dynamic load rating C | 737 kN |
| Basic static load rating C0 | 1860 kN |
| Fatigue load limit Pu | 173 kN |
| Reference speed (thermal) | 750 rpm |
| Limiting speed (mechanical) | 950 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 15500 g |
| Manufacturer designation | SKF NNCL 4856 CV |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 6.4 double-row full complement cylindrical roller bearings |
| Last verified | 2026-09-26 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 6.4 double-row full complement cylindrical roller bearings) · extracted 2026-09-26
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 6.4 double-row full complement cylindrical roller bearings); 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 & NNCL4800-series range
| Bore d | 11.024 in |
|---|---|
| Outer diameter D | 13.78 in |
| Width B | 2.717 in |
| ISO bore code | 56 |
| Radial section height (D−d)/2 | 35 mm |
| Smallest bore in NNCL4800-series | 150 mm |
| Largest outer diameter in NNCL4800-series | 500 mm |
| Width range across NNCL4800-series | 40–100 mm |
| Bore position in NNCL4800-series (smallest first) | 10 of 16 |
| Bore above smallest NNCL4800-series size | 130 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| NNC4856-CV | SKF | full Dimensions and internal design equivalent — standard interchange. | Same ISO 15 envelope 280×350×69 mm and equivalent catalogue ratings; the NNC execution differs in flange/retaining-ring configuration — boundary-dimension interchangeable, but axial-locating behaviour is not identical. |
| NNCF4856-CV | SKF | full Dimensions and internal design equivalent — standard interchange. | Same ISO 15 envelope 280×350×69 mm and equivalent catalogue ratings; the NNCF execution differs in flange/retaining-ring configuration — boundary-dimension interchangeable, but axial-locating behaviour is not identical. |
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 NNCL4856-CV model number is decoded
SKF NNCL 4856 CV is a double-row full-complement cylindrical roller bearing sized 280×350×69 mm — a dimension series 48 (compact heavy section), listed in SKF catalogue PUB BU/P1 17000 ch. 6.4. The NNCL configuration means a double-row full complement bearing with three integral flanges on the inner ring and no retaining ring in the smooth outer ring, which is free to pass over the roller set; functionally the bearing is non-locating: the outer ring can be displaced axially, like an NN design, to absorb shaft expansion. Reading the order-string suffix CV: the full-complement execution — extra rollers replace the cage, trading speed for maximum radial capacity and stiffness. Speed planning for NNCL4856-CV: the catalogue lists 750 r/min thermal reference speed and 950 r/min mechanical limiting speed. The mass entry 15500 g covers the complete catalogue execution. Fit practice for NNCL4856-CV: treat the outer ring as the floating element; keep the inner ring with its three flanges square on the shaft and relubricate through the outer-ring groove. Single-row cylindrical rollers tolerate only about 3–4 minutes of arc misalignment, so verify shaft and housing alignment.
Typical equipment & failure modes
Common applications
- large offshore winch and hook blocks
- mining shovel and dragline pivots
- steelmaking and heavy crane sheaves
Known failure patterns
- inner-ring raceway spalling from overload or contamination in the line-contact hertz zone
- outer-ring raceway fatigue after extended service at loads above the catalogue L10 rating
- roller smearing between the uncaged rollers during slow skidding starts under heavy static load
- polymer cage cracking or softening after sustained running above 120 °C or with incompatible lubricant
- surface distress (micro-pitting) when the EHL film falls below the composite roughness at high specific load
- uneven row loading from misalignment, concentrating fatigue on one row of the double complement
- fretting corrosion on a loose rotating shaft seat or in a vibratory stand-still
Selection pitfalls — read before you substitute
- The NNCF/NNCL/NNC triplet shares the envelope and ratings but differs in outer-ring retention — one retaining ring, none, or two; selecting the wrong one changes the axial-locating scheme.
- Relubrication must reach both roller rows through the annular groove; blocked lube holes starve one row silently and show later as asymmetric raceway wear.
- Press-fit force goes through ring faces only; driving a ring home through the rollers brinells the 350 mm raceway.
- Press-fit force goes through ring faces only; driving a ring home through the rollers brinells the 350 mm raceway.
- The 737/1860 kN ratings are SKF catalogue 17000 (2018) values for the CV execution; re-verify against the current catalogue for critical drives and keep the catalogue version with the specification.
Frequently asked questions
What are the dimensions and catalogue data of NNCL4856-CV?
SKF NNCL 4856 CV is a double-row full-complement cylindrical roller bearing with 280 mm bore, 350 mm OD and 69 mm width per ISO 15. SKF lists C 737 kN, C0 1860 kN, Pu 173 kN, reference speed 750 r/min and limiting speed 950 r/min, mass about 15500 g.
What does the NNCL designation and CV suffix mean?
Suffix CV identifies the full-complement execution: the space a cage would occupy is filled with extra rollers, trading speed for maximum radial capacity and stiffness. Structurally this execution has a double-row full complement bearing with three integral flanges on the inner ring and no retaining ring in the smooth outer ring, which is free to pass over the roller set.
Can NNCL4856-CV take axial load and locate the shaft?
No — the smooth outer ring floats, making NNCL the non-locating member of the arrangement.
How does NNCL4856-CV compare with the other executions in the same envelope?
NNCF (one outer retaining ring, one-direction guidance), NNCL (no retaining ring, floating outer ring) and NNC (retaining rings both sides, two-direction location) share the ISO envelope and ratings but are not interchangeable in a locating arrangement.
What limits the service life of this bearing most often?
On full-complement bearings the dominant risks are roller smearing from skidding below minimum load and contamination; maintain minimum radial load, keep lubricant film thick and accelerate gently.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 6.4 double-row full complement cylindrical roller bearings on 2026-09-26. Read our editorial & correction policy.