NJ1076 bearing: complete specifications & equivalents
The NJ1076 is a ISO 15 radial bearing sized 380 x 560 x 82 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 380 mm |
| Outer diameter D | 560 mm |
| Width B | 82 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 1220 kN |
| Basic static load rating C0 | 1840 kN |
| Fatigue load limit Pu | 141 kN |
| Limiting speed (mechanical) | 1100 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 66500 g |
| Manufacturer designation | NTN NJ1076 |
| Standard | ISO 15 |
| Catalog version | NTN Ball and Roller Bearings CAT.No.2203E |
| Last verified | 2026-10-01 |
Source: catalog reference (NTN Ball and Roller Bearings CAT.No.2203E) · extracted 2026-10-01
Parameters extracted from the official NTN Ball and Roller Bearings catalogue (NTN Ball and Roller Bearings CAT.No.2203E); NTN® is a trademark of NTN Corporation, used here for identification only — mpnbase is not an authorized NTN distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at ntnglobal.com.
Dimensions in inches & NJ1000-series range
| Bore d | 14.961 in |
|---|---|
| Outer diameter D | 22.047 in |
| Width B | 3.228 in |
| ISO bore code | 76 |
| Radial section height (D−d)/2 | 90 mm |
| Smallest bore in NJ1000-series | 25 mm |
| Largest outer diameter in NJ1000-series | 720 mm |
| Width range across NJ1000-series | 12–100 mm |
| Bore position in NJ1000-series (smallest first) | 36 of 42 |
| Bore above smallest NJ1000-series size | 355 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| NJ1076-MA | SKF | full Dimensions and internal design equivalent — standard interchange. | Identical ISO 15 envelope, seal and ratings band — standard interchange; re-verify precision class and clearance per supplier. |
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 NJ1076 model number is decoded
NJ1076 is the extra-light (10/49) section of the NTN NJ1000 dimension series for a 380 mm shaft — 1220 kN of basic dynamic capacity in a 66500 g, open bearing. Digit by digit, NJ1076 reads as NJ (inner ring two ribs + one outer rib), ISO 15 series, and bore 380 mm; trailing letters such as EA or E mark the cage/capacity execution and are part of the order number. NTN prints two speed ceilings: 1,100 r/min grease and 1,200 r/min oil — the pressed-steel cage and lubricant film set the real limit at the 380 mm bore. The 3.2 kN-per-mm-bore figure (1220 kN over 380 mm) lets a NJ1076 interchange candidate be screened quickly against the same-envelope ball or roller alternatives. The NJ design locates in one direction only: for two-direction location fit the matching loose rib ring (NUP execution) or pair the bearings back to back on the 380 mm shaft.
Typical equipment & failure modes
Common applications
- rolling-mill work-roll and backup-roll positions
- large turbine and generator rotor bearings
- wind-turbine gearbox planet and rotor shafts
- ship propulsion line shafts and reduction gears
Known failure patterns
- roller smearing (microwelding) at start-up before the oil film builds under insufficient radial load
- pressed-steel cage pocket wear when rollers skid at light load or too-thin lubricant
- roller-end and raceway scoring from inadequate oil flow under heavy radial load
- electrical pitting on VFD-driven motor shafts without grounding protection
- electrical pitting on VFD-driven motor shafts without grounding protection
Selection pitfalls — read before you substitute
- At 380 mm bore, oil-lubricated arrangements toward 1,200 r/min need positive flow and drain design; the 66500 g NJ1076 ring stores enough heat that grease-only duty needs a careful relubrication calculation.
- Never press either ring through the roller complement when fitting: mounting force goes through the ring faces, or the 560 mm race brinells and releases as vibration within hours.
- If the shaft must be located both ways, do not use NJ1076 alone: pair it with a locating bearing or specify the NUP execution with the matching loose rib ring from the 2203E table.
- Minimum radial load is frequently missed in oversized motor and fan selections: an underloaded NJ1076 skids at 1,100 r/min and fails by smearing long before L10 fatigue.
- If the shaft must be located both ways, do not use NJ1076 alone: pair it with a locating bearing or specify the NUP execution with the matching loose rib ring from the 2203E table.
- The 1220/1840 kN ratings, 141 kN Pu and 66500 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for NJ1076 (standard execution); other makes sharing the ISO 15 envelope revise internal geometry without changing the order number, so keep the 2203E reference with the specification for critical drives.
Frequently asked questions
What are the dimensions and catalogue data of NJ1076?
NJ1076 is an NTN NJ single-row cylindrical roller bearing to ISO 15: 380 mm bore, 560 mm OD and 82 mm width (14.961 × 22.047 × 3.228 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 1220 kN, C0 1840 kN, Pu 141 kN, grease limiting speed 1,100 r/min, oil 1,200 r/min, mass about 66500 g. It is open, with a pressed sheet-steel cage.
What is the difference between NU, NJ, NUP, N and NF cylindrical roller bearings?
The prefix states the rib arrangement: NU has two outer-ring ribs and a ribless inner ring (float, no axial load); NJ adds ribs for one-direction location; NUP adds a loose L-ring to locate both directions; N has two inner-ring ribs and a separable outer ring; NF has one rib per ring for one-direction guidance. NJ1076 is two integral ribs on the inner ring and one rib on the outer ring — it locates the shaft in one axial direction.
What do the EA, E and ＊ suffixes mean on NTN cylindrical roller bearings?
EA is NTN's high-capacity design with a pressed sheet-steel cage and optimised roller complement in the same ISO 15 envelope; E marks the high-capacity design at the larger bores; the ＊ symbol printed before the code in the NTN catalogue marks the ULTAGE new-generation specification and is not typed as part of the order number. NJ1076 is supplied in the standard open execution shown in the table.
Can NJ1076 take axial load and locate a shaft?
the NJ design accepts axial load in one direction and provides one-way shaft location. For two-direction location use an NUP execution or an NJ pair with loose rib rings.
What do Fw and Ew mean for NJ1076?
Fw is the inner sub-assembly raceway/roller-set envelope diameter and Ew the outer-ring raceway diameter printed for geometric checks: Fw 425 mm, Ew 515 mm. The nominal bore/OD remain 380/560 mm; Fw/Ew describe the rolling-contact path, and speeds still run to 1,100 r/min grease / 1,200 r/min oil.
Reviewed & verified by the MPN Base engineering desk against source catalog NTN Ball and Roller Bearings CAT.No.2203E on 2026-10-01. Read our editorial & correction policy.