NJ1072 bearing: complete specifications & equivalents
The NJ1072 is a ISO 15 radial bearing sized 360 x 540 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 | 360 mm |
| Outer diameter D | 540 mm |
| Width B | 82 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 1190 kN |
| Basic static load rating C0 | 1750 kN |
| Fatigue load limit Pu | 136 kN |
| Limiting speed (mechanical) | 1100 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 63700 g |
| Manufacturer designation | NTN NJ1072 |
| 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 | 14.173 in |
|---|---|
| Outer diameter D | 21.26 in |
| Width B | 3.228 in |
| ISO bore code | 72 |
| 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) | 35 of 42 |
| Bore above smallest NJ1000-series size | 335 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| NJ1072 | 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 NJ1072 model number is decoded
NJ1072 belongs to the NTN cylindrical roller range in NTN Ball and Roller Bearings CAT.No.2203E: line-contact rollers between ground raceways for a 1190 kN dynamic rating in the 360 mm bore. On the NTN nameplate NJ states which ring carries the ribs, which determines whether NJ1072 floats or locates; the numeric remainder is the ISO 15 series and 360 mm bore reference, not a fit or clearance instruction. NTN ships these bearings open with normal (CN) radial clearance and P0 tolerance as standard; precision classes and C3/C4 clearance are separate order suffixes, not part of NJ1072. Mass 63700 g for the 360×540×82 mm NJ1072 execution covers the pressed-steel cage and full roller complement; substitute on mass plus rating, not envelope alone. Housing and shaft fillets must clear the ring chamfers of NJ1072; an oversized radius locks the ring on its face and tilts the 82 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
- cage wear accelerated when the EA high-capacity roller complement runs continuously above its thermal balance
- grease starvation and cage drag when relubrication intervals are extended past the grease life
- brinelling from static overload or impact during handling
- fretting corrosion on a loose rotating shaft seat
Selection pitfalls — read before you substitute
- At 360 mm bore, oil-lubricated arrangements toward 1,300 r/min need positive flow and drain design; the 63700 g NJ1072 ring stores enough heat that grease-only duty needs a careful relubrication calculation.
- The 82 mm width and abutment faces must be square to the axis; a tilted spacer concentrates load across the roller set and shows as uneven raceway polish on the 360 mm inner ring.
- Grease limiting speed 1,100 r/min and oil 1,300 r/min are different limits for NJ1072: the first is the cage/lubricant mechanical ceiling, the second assumes real oil flow rather than an oil bath.
- Open NJ1072 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 360 mm contact.
- Never press either ring through the roller complement when fitting: mounting force goes through the ring faces, or the 540 mm race brinells and releases as vibration within hours.
- The 1190/1750 kN ratings, 136 kN Pu and 63700 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for NJ1072 (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 NJ1072?
NJ1072 is an NTN NJ single-row cylindrical roller bearing to ISO 15: 360 mm bore, 540 mm OD and 82 mm width (14.173 × 21.26 × 3.228 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 1190 kN, C0 1750 kN, Pu 136 kN, grease limiting speed 1,100 r/min, oil 1,300 r/min, mass about 63700 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. NJ1072 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. NJ1072 is supplied in the standard open execution shown in the table.
Can NJ1072 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 NJ1072?
Fw is the inner sub-assembly raceway/roller-set envelope diameter and Ew the outer-ring raceway diameter printed for geometric checks: Fw 405 mm, Ew 495 mm. The nominal bore/OD remain 360/540 mm; Fw/Ew describe the rolling-contact path, and speeds still run to 1,100 r/min grease / 1,300 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.