NNF5019-B-2LS bearing: complete specifications & equivalents
The NNF5019-B-2LS is a ISO 15 radial bearing sized 95 x 145 x 67 mm (bore x OD x width) with 2RS sealing. Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 95 mm |
| Outer diameter D | 145 mm |
| Width B | 67 mm |
| Material | GCr15 |
| Seal / shield | 2RS |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | none |
| Basic dynamic load rating C | 330 kN |
| Basic static load rating C0 | 570 kN |
| Fatigue load limit Pu | 71 kN |
| Reference speed (thermal) | 900 rpm |
| Limiting speed (mechanical) | 900 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 3900 g |
| Manufacturer designation | SKF NNF 5019 B-2LS |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 6.5 sealed 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. 6.5 sealed 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. 6.5 sealed 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 & NNF5000-series range
| Bore d | 3.74 in |
|---|---|
| Outer diameter D | 5.709 in |
| Width B | 2.638 in |
| ISO bore code | 19 |
| Radial section height (D−d)/2 | 25 mm |
| Smallest bore in NNF5000-series | 20 mm |
| Largest outer diameter in NNF5000-series | 420 mm |
| Width range across NNF5000-series | 30–190 mm |
| Bore position in NNF5000-series (smallest first) | 16 of 31 |
| Bore above smallest NNF5000-series size | 75 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the NNF5019-B-2LS model number is decoded
In SKF catalogue PUB BU/P1 17000, SKF NNF 5019 B-2LS denotes a sealed double-row full-complement cylindrical roller bearing on the ISO 15 95×145×67 mm envelope, dimension series 50 (compact heavy section, wide), with catalogue mass 3900 g. Reading the NNF prefix: a double-row full complement bearing with contact seals on both sides, three integral inner-ring flanges, an annular lube groove in the outer ring and additional lubrication holes in the inner ring, delivered grease-packed. This makes the execution a sealed locating unit for very heavy radial loads; the sealed-for-life execution is the classic crane-sheave bearing. The B-2LS suffix denotes nitrile-rubber contact seals on both sides of a grease-packed full-complement unit. The full complement of extra rollers fitted in place of a cage is reflected in the published speeds and temperature limits. Selection arithmetic: C0/C ≈ 1.73 (570 against 330 kN), and the Pu figure 71 kN is the fatigue load-limit floor for the SKF life equation; SKF publishes only a limiting speed of 900 r/min for this sealed execution — the seal contact and packed grease, not a thermal reference speed, set the ceiling. Assembly note: mount as a complete sealed unit — never wash out the factory grease; the seals set the speed ceiling, and relubrication, where specified, goes through the ring grooves. Heat steel rings inductively to max 120 °C, and never wash a full-complement unit in a way that displaces rollers.
Typical equipment & failure modes
Common applications
- bulk-material rope-pulley systems
- heavy harbour and offshore crane sheaves
- steelwork and scrap-yard crane blocks
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
- seal-lip wear and grease loss in dusty crane and construction service after the relubrication interval is exceeded
- 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
- grease degradation inside the sealed unit after long high-temperature periods, invisible until noise rises
- false brinelling on standby machines exposed to external vibration
Selection pitfalls — read before you substitute
- The sealed NNF unit is packed for life with the correct grease — do not heat it above the seal limit or wash it before mounting; damaged lip seals invalidate the heavy-load duty.
- The B1 width (66 mm inner-assembly width) differs from the overall B 67 mm; check housing and spacer geometry against both values.
- Shaft and housing fillets must clear the bearing chamfers; an oversized radius tilts the 67 mm-wide ring and concentrates load.
- Press-fit force goes through ring faces only; driving a ring home through the rollers brinells the 145 mm raceway.
- The 330/570 kN ratings are SKF catalogue 17000 (2018) values for the B-2LS 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 NNF5019-B-2LS?
SKF NNF 5019 B-2LS is a sealed double-row full-complement cylindrical roller bearing with 95 mm bore, 145 mm OD and 67 mm width per ISO 15. SKF lists C 330 kN, C0 570 kN, Pu 71 kN, limiting speed 900 r/min (sealed execution), mass about 3900 g. Inner-assembly width B1 is 66 mm.
What does the NNF designation and B-2LS suffix mean?
The B-2LS suffix denotes nitrile-rubber contact seals on both sides of a grease-packed full-complement unit. Structurally this execution has a double-row full complement bearing with contact seals on both sides, three integral inner-ring flanges, an annular lube groove in the outer ring and additional lubrication holes in the inner ring, delivered grease-packed.
Can NNF5019-B-2LS take axial load and locate the shaft?
The sealed NNF unit can guide light axial loads in both directions via the flanged inner ring, but its primary duty is very heavy radial load in sealed positions.
How does NNF5019-B-2LS compare with the other executions in the same envelope?
The sealed NNF execution shares its envelope with the open NNCF/NNCL/NNC full-complement bearings but is delivered grease-packed with contact seals and a much lower speed ceiling.
Does the sealed NNF bearing need relubrication?
NNF bearings are delivered grease-packed and sealed for long service; where the design provides relubrication grooves/holes, replenish through them at the prescribed interval. Never wash the bearing out or exceed the seal-limited speed.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 6.5 sealed double-row full complement cylindrical roller bearings on 2026-09-26. Read our editorial & correction policy.