NUP1032 bearing: complete specifications & equivalents
The NUP1032 is a ISO 15 radial bearing sized 160 x 240 x 38 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 160 mm |
| Outer diameter D | 240 mm |
| Width B | 38 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 263 kN |
| Basic static load rating C0 | 340 kN |
| Fatigue load limit Pu | 34 kN |
| Limiting speed (mechanical) | 2800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 5810 g |
| Manufacturer designation | NTN NUP1032 |
| 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 | 6.299 in |
|---|---|
| Outer diameter D | 9.449 in |
| Width B | 1.496 in |
| ISO bore code | 32 |
| Radial section height (D−d)/2 | 40 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) | 23 of 42 |
| Bore above smallest NUP1000-series size | 135 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| NUP1032 | 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 NUP1032 model number is decoded
For pure radial duty on a 160 mm shaft NTN supplies NUP1032: the NJ rib arrangement plus a loose L-shaped rib ring on the inner ring; the open execution is rated 2,800 r/min on grease and 3,300 r/min on oil. The leading NUP defines the rib arrangement (inner ring two ribs + loose L-ring); the dimension-series digits and the two-digit bore code resolve to 160 mm, with 240 mm OD and 38 mm width from the ISO 15 general plan. NTN prints the raceway diameters for this size — Fw 180 mm and Ew 220 mm — the envelope inside the 160/240 mm bore/OD where the rollers actually run. Equivalent-load planning treats NUP1032 as a pure radial bearing: keep P below 263 kN at the required L10, and let a paired angular-contact or thrust part carry any sustained axial component. Housing and shaft fillets must clear the ring chamfers of NUP1032; an oversized radius locks the ring on its face and tilts the 38 mm-wide seat.
Typical equipment & failure modes
Common applications
- mining SAG/ball-mill drive shafts
- offshore drawworks and winch drums
- heavy press and large gearbox main shafts
- rolling-mill work-roll and backup-roll positions
Known failure patterns
- roller smearing (microwelding) at start-up before the oil film builds under insufficient radial load
- cage distortion after a mounting blow carried through the roller set
- micro-pitting when the EHL film falls below the composite roughness at high specific load
- electrical pitting on VFD-driven motor shafts without grounding protection
- hard-particle indentation of raceways in unfiltered oil or open arrangements
Selection pitfalls — read before you substitute
- At 160 mm bore, oil-lubricated arrangements toward 3,300 r/min need positive flow and drain design; the 5810 g NUP1032 ring stores enough heat that grease-only duty needs a careful relubrication calculation.
- The 38 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 160 mm inner ring.
- The EA high-capacity roller complement changes the load figure versus the basic execution of the same number; the 263/340 kN pair here belongs to NUP1032 as printed, not to the bare size.
- Open NUP1032 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 160 mm contact.
- The NUP rib arrangement is not interchangeable with another prefix on the same 160 mm seat: inner ring two ribs + loose L-ring. Swapping NU for NJ changes axial location behaviour even though the 240×38 mm envelope matches.
- The 263/340 kN ratings, 34 kN Pu and 5810 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for NUP1032 (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 NUP1032?
NUP1032 is an NTN NUP single-row cylindrical roller bearing to ISO 15: 160 mm bore, 240 mm OD and 38 mm width (6.299 × 9.449 × 1.496 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 263 kN, C0 340 kN, Pu 34 kN, grease limiting speed 2,800 r/min, oil 3,300 r/min, mass about 5810 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. NUP1032 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. NUP1032 is supplied in the standard open execution shown in the table.
Can NUP1032 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 NUP1032?
Fw is the inner sub-assembly raceway/roller-set envelope diameter and Ew the outer-ring raceway diameter printed for geometric checks: Fw 180 mm, Ew 220 mm. The nominal bore/OD remain 160/240 mm; Fw/Ew describe the rolling-contact path, and speeds still run to 2,800 r/min grease / 3,300 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.