NNCF5008-CV bearing: complete specifications & equivalents
The NNCF5008-CV is a ISO 15 radial bearing sized 40 x 68 x 38 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 40 mm |
| Outer diameter D | 68 mm |
| Width B | 38 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | none |
| Basic dynamic load rating C | 106 kN |
| Basic static load rating C0 | 140 kN |
| Fatigue load limit Pu | 17 kN |
| Reference speed (thermal) | 4800 rpm |
| Limiting speed (mechanical) | 6000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 560 g |
| Manufacturer designation | SKF NNCF 5008 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 & NNCF5000-series range
| Bore d | 1.575 in |
|---|---|
| Outer diameter D | 2.677 in |
| Width B | 1.496 in |
| ISO bore code | 08 |
| Radial section height (D−d)/2 | 14 mm |
| Smallest bore in NNCF5000-series | 20 mm |
| Largest outer diameter in NNCF5000-series | 600 mm |
| Width range across NNCF5000-series | 30–272 mm |
| Bore position in NNCF5000-series (smallest first) | 5 of 36 |
| Bore above smallest NNCF5000-series size | 20 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| NNF5008-ADB-2LSV | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Sealed, grease-packed counterpart (SKF NNF 5008 ADB-2LSV) on the same ISO 15 40×68×38 mm envelope; contact seals both sides reduce the limiting speed and catalogue ratings differ by execution. |
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 NNCF5008-CV model number is decoded
SKF NNCF 5008 CV is a double-row full-complement cylindrical roller bearing sized 40×68×38 mm — a dimension series 50 (compact heavy section, wide), listed in SKF catalogue PUB BU/P1 17000 ch. 6.4. Structurally, the NNCF design has a non-separable double-row full complement bearing with three integral flanges on the inner ring and one retaining ring in the outer ring; the outer ring also has an annular lubrication groove with holes. In arrangement terms it is one-direction locating: the retained outer ring guides the shaft axially in one direction. 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. With C 106 kN and C0 140 kN, size the bearing on the 40×68 mm ISO 15 envelope and check the 17 kN Pu against the equivalent-load floor; the catalogue lists 4,800 r/min thermal reference speed and 6,000 r/min mechanical limiting speed. Fit practice for NNCF5008-CV: the retaining ring must never be loaded axially in operation; route relubrication through the outer-ring groove and keep the unit non-separable during handling. 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
- construction machinery pivot points
- hydraulic press eccentric shafts
- crane rope-sheave assemblies
- heavy gearbox low-speed shafts
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
- cage pocket wear from roller skidding at insufficient radial load or during start-up before oil film build-up
- roller-end scoring from inadequate oil flow in the roller-raceway contact
- uneven row loading from misalignment, concentrating fatigue on one row of the double complement
- false brinelling on standby machines exposed to external vibration
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.
- Catalogue reference and limiting speeds are different criteria: observe the mechanical ceiling even when thermal calculations allow more.
- Shaft and housing fillets must clear the bearing chamfers; an oversized radius tilts the 38 mm-wide ring and concentrates load.
- The 106/140 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 NNCF5008-CV?
SKF NNCF 5008 CV is a double-row full-complement cylindrical roller bearing with 40 mm bore, 68 mm OD and 38 mm width per ISO 15. SKF lists C 106 kN, C0 140 kN, Pu 17 kN, reference speed 4,800 r/min and limiting speed 6,000 r/min, mass about 560 g.
What does the NNCF 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 non-separable double-row full complement bearing with three integral flanges on the inner ring and one retaining ring in the outer ring; the outer ring also has an annular lubrication groove with holes.
Can NNCF5008-CV take axial load and locate the shaft?
In one direction, via the retained outer ring; the retaining ring is not a load path for continuous thrust.
How does NNCF5008-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.