NJ1060 bearing: complete specifications & equivalents
The NJ1060 is a ISO 15 radial bearing sized 300 x 460 x 74 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 300 mm |
| Outer diameter D | 460 mm |
| Width B | 74 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 950 kN |
| Basic static load rating C0 | 1340 kN |
| Fatigue load limit Pu | 109 kN |
| Limiting speed (mechanical) | 1400 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 42900 g |
| Manufacturer designation | NTN NJ1060 |
| 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 | 11.811 in |
|---|---|
| Outer diameter D | 18.11 in |
| Width B | 2.913 in |
| ISO bore code | 60 |
| Radial section height (D−d)/2 | 80 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) | 32 of 42 |
| Bore above smallest NJ1000-series size | 275 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| NJ1060-MA | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 300×460×74 mm envelope per ISO 15; catalogue load ratings differ by >10% — re-rate the application before substituting. |
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 NJ1060 model number is decoded
In NTN Ball and Roller Bearings CAT.No.2203E, NJ1060 appears as a 300 mm bore single-row cylindrical roller bearing (950 kN C / 1340 kN C0) with a pressed sheet-steel cage, listed to the ISO 15 boundary plan. Numbering ties NJ1060 to its envelope: type code NJ, series NJ1000, 300 mm bore; the 460×74 mm outline therefore swaps dimensionally with other ISO 15 bearings of the same code, though rib arrangements differ by prefix. With C 950 kN and C0 1340 kN (C0/C ≈ 1.41) the bearing is proportioned for heavy radial load; the NJ design accepts axial load in one direction and provides one-way shaft location. Speed ratio check: limiting 1,400 r/min is .88 of the 1,600 r/min oil value for NJ1060; grease-churn heating closes that gap as fill quantity rises. After mounting verify the outer ring slides axially by hand at ambient temperature; a stuck float ring in a NJ1060 non-locating position preloads the bearing when the shaft grows.
Typical equipment & failure modes
Common applications
- large turbine and generator rotor bearings
- wind-turbine gearbox planet and rotor shafts
- ship propulsion line shafts and reduction gears
- mining SAG/ball-mill drive shafts
Known failure patterns
- inner-ring raceway spalling from overload in the line-contact Hertzian zone
- 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
- hard-particle indentation of raceways in unfiltered oil or open arrangements
Selection pitfalls — read before you substitute
- At 300 mm bore, oil-lubricated arrangements toward 1,600 r/min need positive flow and drain design; the 42900 g NJ1060 ring stores enough heat that grease-only duty needs a careful relubrication calculation.
- Grease limiting speed 1,400 r/min and oil 1,600 r/min are different limits for NJ1060: the first is the cage/lubricant mechanical ceiling, the second assumes real oil flow rather than an oil bath.
- Grease limiting speed 1,400 r/min and oil 1,600 r/min are different limits for NJ1060: the first is the cage/lubricant mechanical ceiling, the second assumes real oil flow rather than an oil bath.
- Never press either ring through the roller complement when fitting: mounting force goes through the ring faces, or the 460 mm race brinells and releases as vibration within hours.
- Minimum radial load is frequently missed in oversized motor and fan selections: an underloaded NJ1060 skids at 1,400 r/min and fails by smearing long before L10 fatigue.
- The 950/1340 kN ratings, 109 kN Pu and 42900 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for NJ1060 (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 NJ1060?
NJ1060 is an NTN NJ single-row cylindrical roller bearing to ISO 15: 300 mm bore, 460 mm OD and 74 mm width (11.811 × 18.11 × 2.913 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 950 kN, C0 1340 kN, Pu 109 kN, grease limiting speed 1,400 r/min, oil 1,600 r/min, mass about 42900 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. NJ1060 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. NJ1060 is supplied in the standard open execution shown in the table.
Can NJ1060 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 NJ1060?
Fw is the inner sub-assembly raceway/roller-set envelope diameter and Ew the outer-ring raceway diameter printed for geometric checks: Fw 340 mm, Ew 420 mm. The nominal bore/OD remain 300/460 mm; Fw/Ew describe the rolling-contact path, and speeds still run to 1,400 r/min grease / 1,600 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.