NJ2264 bearing: complete specifications & equivalents
The NJ2264 is a ISO 15 radial bearing sized 320 x 580 x 150 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 320 mm |
| Outer diameter D | 580 mm |
| Width B | 150 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 2830 kN |
| Basic static load rating C0 | 4350 kN |
| Fatigue load limit Pu | 340 kN |
| Limiting speed (mechanical) | 950 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 168000 g |
| Manufacturer designation | NTN NJ2264 |
| 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 & NJ2200-series range
| Bore d | 12.598 in |
|---|---|
| Outer diameter D | 22.835 in |
| Width B | 5.906 in |
| ISO bore code | 64 |
| Radial section height (D−d)/2 | 130 mm |
| Smallest bore in NJ2200-series | 17 mm |
| Largest outer diameter in NJ2200-series | 580 mm |
| Width range across NJ2200-series | 16–150 mm |
| Bore position in NJ2200-series (smallest first) | 34 of 34 |
| Bore above smallest NJ2200-series size | 303 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| NJ2264 | ISO 15 | full Dimensions and internal design equivalent — standard interchange. | ISO 15 boundary-dimension envelope; brand-specific OEM equivalents (NSK/FAG/NTN) pending multi-source data. |
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 NJ2264 model number is decoded
NJ2264 is an NTN NJ cylindrical roller bearing: two integral ribs on the inner ring and one rib on the outer ring — it locates the shaft in one axial direction, inside the 320×580×150 mm ISO 15 envelope. Numbering ties NJ2264 to its envelope: type code NJ, series NJ2200, 320 mm bore; the 580×150 mm outline therefore swaps dimensionally with other ISO 15 bearings of the same code, though rib arrangements differ by prefix. The 150 mm width and 130.0 mm section put the NJ2200 series in the wide (22) section; wide 22/23 variants at the same bore change OD, width and heat generation and are not drop-in swaps. The 320 mm (12.598 in) bore and 580 mm (22.835 in) OD are ISO 15 boundary values; fillet and shoulder dimensions must still come from the NTN mounting table for the 150 mm-wide ring. Housing and shaft fillets must clear the ring chamfers of NJ2264; an oversized radius locks the ring on its face and tilts the 150 mm-wide seat.
Typical equipment & failure modes
Common applications
- heavy press and large gearbox main shafts
- rolling-mill work-roll and backup-roll positions
- large turbine and generator rotor bearings
- wind-turbine gearbox planet and rotor shafts
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
- edge loading from shaft deflection beyond the 3–4 arc-minute alignment limit
- brinelling from static overload or impact during handling
Selection pitfalls — read before you substitute
- At 320 mm bore, oil-lubricated arrangements toward 1,100 r/min need positive flow and drain design; the 168000 g NJ2264 ring stores enough heat that grease-only duty needs a careful relubrication calculation.
- Do not replace NJ2264 with a deep-groove ball bearing on rating alone: line contact gives 2830 kN radial capacity but the bearing cannot carry the thrust duty a ball bearing can and misalignment tolerance is only 3–4 arc-minutes.
- The 130.0 mm section at 320 mm bore leaves a narrow oil path; with the standard cage the relubrication groove and oil-level design must keep grease from churning in the 150 mm-wide cavity.
- Wide (22/23) and light (10/49) executions at 320 mm bore share bore but not OD/width; check the full NJ2200 series code before substituting, because housing and shoulder geometry will not interchange.
- Open NJ2264 units need application-supplied sealing and a defined lubricant schedule; film thickness is the first failure mode for line contact when viscosity drops at the 320 mm contact.
- The 2830/4350 kN ratings, 340 kN Pu and 168000 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for NJ2264 (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 NJ2264?
NJ2264 is an NTN NJ single-row cylindrical roller bearing to ISO 15: 320 mm bore, 580 mm OD and 150 mm width (12.598 × 22.835 × 5.906 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 2830 kN, C0 4350 kN, Pu 340 kN, grease limiting speed 950 r/min, oil 1,100 r/min, mass about 168000 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. NJ2264 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. NJ2264 is supplied in the standard open execution shown in the table.
Can NJ2264 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 NJ2264?
Fw is the inner sub-assembly raceway/roller-set envelope diameter and Ew the outer-ring raceway diameter printed for geometric checks: Fw 390 mm, Ew 510 mm. The nominal bore/OD remain 320/580 mm; Fw/Ew describe the rolling-contact path, and speeds still run to 950 r/min grease / 1,100 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.