NUP1030 bearing: complete specifications & equivalents
The NUP1030 is a ISO 15 radial bearing sized 150 x 225 x 35 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 150 mm |
| Outer diameter D | 225 mm |
| Width B | 35 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 224 kN |
| Basic static load rating C0 | 294 kN |
| Fatigue load limit Pu | 29.6 kN |
| Limiting speed (mechanical) | 3000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 4700 g |
| Manufacturer designation | NTN NUP1030 |
| 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 & NUP1000-series range
| Bore d | 5.906 in |
|---|---|
| Outer diameter D | 8.858 in |
| Width B | 1.378 in |
| ISO bore code | 30 |
| Radial section height (D−d)/2 | 37.5 mm |
| Smallest bore in NUP1000-series | 25 mm |
| Largest outer diameter in NUP1000-series | 720 mm |
| Width range across NUP1000-series | 12–100 mm |
| Bore position in NUP1000-series (smallest first) | 22 of 42 |
| Bore above smallest NUP1000-series size | 125 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| NUP1030 | 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 NUP1030 model number is decoded
NTN lists NUP1030 on the 150×225 mm envelope, 35 mm wide: a line-contact radial bearing with a pressed sheet-steel cage and a grease limiting speed of 3,000 r/min. Numbering ties NUP1030 to its envelope: type code NUP, series NUP1000, 150 mm bore; the 225×35 mm outline therefore swaps dimensionally with other ISO 15 bearings of the same code, though rib arrangements differ by prefix. With C 224 kN and C0 294 kN (C0/C ≈ 1.31) the bearing is proportioned for heavy radial load; the NUP design provides two-direction axial location via its loose rib ring, for light/moderate thrust guidance. Selection arithmetic: Pu 29.6 kN is the fatigue load limit feeding the adjusted-life equation, and the C0/C ratio of 1.31 (294/224 kN) shows the high-static-capacity proportioning of this 150 mm bore. Mount the separable inner ring + roller assembly on the shaft first and slide the outer ring into the housing; never press the outer ring through the rollers of NUP1030.
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
- 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
- rolling-contact fatigue after the catalogue L10 life is exceeded
- electrical pitting on VFD-driven motor shafts without grounding protection
Selection pitfalls — read before you substitute
- At 150 mm bore, oil-lubricated arrangements toward 3,500 r/min need positive flow and drain design; the 4700 g NUP1030 ring stores enough heat that grease-only duty needs a careful relubrication calculation.
- The EA high-capacity roller complement changes the load figure versus the basic execution of the same number; the 224/294 kN pair here belongs to NUP1030 as printed, not to the bare size.
- The NUP rib arrangement is not interchangeable with another prefix on the same 150 mm seat: inner ring two ribs + loose L-ring. Swapping NU for NJ changes axial location behaviour even though the 225×35 mm envelope matches.
- The EA high-capacity roller complement changes the load figure versus the basic execution of the same number; the 224/294 kN pair here belongs to NUP1030 as printed, not to the bare size.
- Minimum radial load is frequently missed in oversized motor and fan selections: an underloaded NUP1030 skids at 3,000 r/min and fails by smearing long before L10 fatigue.
- The 224/294 kN ratings, 29.6 kN Pu and 4700 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for NUP1030 (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 NUP1030?
NUP1030 is an NTN NUP single-row cylindrical roller bearing to ISO 15: 150 mm bore, 225 mm OD and 35 mm width (5.906 × 8.858 × 1.378 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 224 kN, C0 294 kN, Pu 29.6 kN, grease limiting speed 3,000 r/min, oil 3,500 r/min, mass about 4700 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. NUP1030 is the NJ rib arrangement plus a loose L-shaped rib ring on the inner ring — it locates the shaft in both axial directions.
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. NUP1030 is supplied in the standard open execution shown in the table.
Can NUP1030 take axial load and locate a shaft?
the NUP design provides two-direction axial location via its loose rib ring, for light/moderate thrust guidance. The loose rib ring still only suits light/short-duration axial guidance; heavy thrust belongs to a dedicated thrust bearing.
What do Fw and Ew mean for NUP1030?
Fw is the inner sub-assembly raceway/roller-set envelope diameter and Ew the outer-ring raceway diameter printed for geometric checks: Fw 169.5 mm, Ew 205.5 mm. The nominal bore/OD remain 150/225 mm; Fw/Ew describe the rolling-contact path, and speeds still run to 3,000 r/min grease / 3,500 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.