NJ1876-ECMP bearing: complete specifications & equivalents
The NJ1876-ECMP 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 | 561 kN |
| Basic static load rating C0 | 1120 kN |
| Fatigue load limit Pu | 98 kN |
| Reference speed (thermal) | 1300 rpm |
| Limiting speed (mechanical) | 2000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 21000 g |
| Manufacturer designation | SKF NJ 1876 ECMP |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 6.1 single-row cylindrical roller bearings |
| Last verified | 2026-09-26 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 6.1 single-row 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. 6.1 single-row 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 & NJ1800-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 NJ1800-series | 380 mm |
| Largest outer diameter in NJ1800-series | 780 mm |
| Width range across NJ1800-series | 46–69 mm |
| Bore position in NJ1800-series (smallest first) | 1 of 3 |
| Bore above smallest NJ1800-series size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| NU1876-ECMP | SKF | full Dimensions and internal design equivalent — standard interchange. | Same ISO 15 envelope 380×480×46 mm and equivalent catalogue ratings; the NU 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 NJ1876-ECMP model number is decoded
In SKF catalogue PUB BU/P1 17000, SKF NJ 1876 ECMP denotes a single-row caged cylindrical roller bearing on the ISO 15 380×480×46 mm envelope, dimension series 18 (ultra-slim section for large shafts), with catalogue mass 21000 g. The NJ configuration means two integral flanges on the inner ring and no flanges on the outer ring; the inner ring retains the roller set; functionally the bearing is able to locate the shaft axially in one direction; an HJ angle ring on the opposite side converts it into two-direction location. The ECMP suffix denotes the E-design execution with a one-piece machined brass cage for higher-temperature and higher-speed continuous duty. Speed planning for NJ1876-ECMP: the catalogue lists 1,300 r/min thermal reference speed and 2,000 r/min mechanical limiting speed. The mass entry 21000 g covers the complete catalogue execution. Fit practice for NJ1876-ECMP: orient the inner-ring flange side toward the axial load direction; if an HJ angle ring is used, verify its fit and clearance before locking the arrangement. 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
- mining hoist and winder shafts
- offshore drawworks shafts
- large rolling-mill drive trains
- marine propulsion line 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
- cage pocket wear from roller skew at light 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
- edge-loading fatigue after shaft deflection beyond the 3–4 minute alignment limit
- smearing (microwelding) on roller surfaces during skid starts with insufficient minimum load
Selection pitfalls — read before you substitute
- Do not use a NJ bearing where two-direction axial location is required without an HJ angle ring
- The dimension series 18 (ultra-slim section for large shafts) envelope is shared with the N/NU/NJ/NUP executions of 1876, but flange configuration and axial-locating behaviour differ — quote the full SKF NJ 1876 ECMP and do not substitute rib styles without checking the shaft locating scheme.
- Press-fit force goes through ring faces only; driving a ring home through the rollers brinells the 480 mm raceway.
- Shaft and housing fillets must clear the bearing chamfers; an oversized radius tilts the 46 mm-wide ring and concentrates load.
- The 561/1120 kN ratings are SKF catalogue 17000 (2018) values for the ECMP 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 NJ1876-ECMP?
SKF NJ 1876 ECMP is a single-row caged cylindrical roller bearing with 380 mm bore, 480 mm OD and 46 mm width per ISO 15. SKF lists C 561 kN, C0 1120 kN, Pu 98 kN, reference speed 1,300 r/min and limiting speed 2,000 r/min, mass about 21000 g.
What does the NJ designation and ECMP suffix mean?
The ECMP suffix denotes the E-design execution with a one-piece machined brass cage for higher-temperature and higher-speed continuous duty. Structurally this execution has two integral flanges on the inner ring and no flanges on the outer ring; the inner ring retains the roller set.
Can NJ1876-ECMP take axial load and locate the shaft?
In one direction only, via the two inner-ring flanges. Add an HJ angle ring on the opposite side for two-direction location.
How does NJ1876-ECMP compare with the other executions in the same envelope?
The N/NU/NJ/NUP executions share the ISO 15 envelope and load ratings but differ in flange arrangement and axial-locating behaviour; quote the exact order number.
What limits the service life of this bearing most often?
Line-contact fatigue above the L10 rating, cage wear at light loads and high temperatures, and edge loading from misalignment beyond about 3–4 minutes of arc are the typical failure drivers.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 6.1 single-row cylindrical roller bearings on 2026-09-26. Read our editorial & correction policy.