NUP220 bearing: complete specifications & equivalents
The NUP220 is a ISO 15 radial bearing sized 100 x 180 x 34 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 100 mm |
| Outer diameter D | 180 mm |
| Width B | 34 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 203 kN |
| Basic static load rating C0 | 217 kN |
| Fatigue load limit Pu | 23.9 kN |
| Limiting speed (mechanical) | 3800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 3260 g |
| Manufacturer designation | NTN NUP220 |
| 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 & NUP200-series range
| Bore d | 3.937 in |
|---|---|
| Outer diameter D | 7.087 in |
| Width B | 1.339 in |
| ISO bore code | 20 |
| Radial section height (D−d)/2 | 40 mm |
| Smallest bore in NUP200-series | 17 mm |
| Largest outer diameter in NUP200-series | 580 mm |
| Width range across NUP200-series | 12–92 mm |
| Bore position in NUP200-series (smallest first) | 18 of 35 |
| Bore above smallest NUP200-series size | 83 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| NUP220-ECP | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 100×180×34 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 NUP220 model number is decoded
For pure radial duty on a 100 mm shaft NTN supplies NUP220: the NJ rib arrangement plus a loose L-shaped rib ring on the inner ring; the open execution is rated 3,800 r/min on grease and 4,500 r/min on oil. Numbering ties NUP220 to its envelope: type code NUP, series NUP200, 100 mm bore; the 180×34 mm outline therefore swaps dimensionally with other ISO 15 bearings of the same code, though rib arrangements differ by prefix. NTN prints the raceway diameters for this size — Fw 120 mm and Ew 160 mm — the envelope inside the 100/180 mm bore/OD where the rollers actually run. The 100 mm (3.937 in) bore and 180 mm (7.087 in) OD are ISO 15 boundary values; fillet and shoulder dimensions must still come from the NTN mounting table for the 34 mm-wide ring. Confirm the loose L-shaped rib ring is fitted and seated, since it is what turns the NJ-type arrangement into the two-direction-locating NUP set on the 100 mm shaft.
Typical equipment & failure modes
Common applications
- crusher and vibrating-screen drive shafts
- marine gearbox and deck-machinery shafts
- large electric-motor and generator rotors
- cement and mining conveyor drive pulleys
Known failure patterns
- inner-ring raceway spalling from overload in the line-contact Hertzian zone
- cage distortion after a mounting blow carried through the roller set
- roller-end and raceway scoring from inadequate oil flow under heavy radial load
- rolling-contact fatigue after the catalogue L10 life is exceeded
- false brinelling on standby machines exposed to external vibration
Selection pitfalls — read before you substitute
- Induction-heat the 100 mm inner ring (max 120 °C) and mount it before fitting the outer ring; the ring mass makes square guidance essential — driving through the rollers brinells the 180 mm raceway.
- The EA high-capacity roller complement changes the load figure versus the basic execution of the same number; the 203/217 kN pair here belongs to NUP220 as printed, not to the bare size.
- Minimum radial load is frequently missed in oversized motor and fan selections: an underloaded NUP220 skids at 3,800 r/min and fails by smearing long before L10 fatigue.
- Never press either ring through the roller complement when fitting: mounting force goes through the ring faces, or the 180 mm race brinells and releases as vibration within hours.
- The NUP rib arrangement is not interchangeable with another prefix on the same 100 mm seat: inner ring two ribs + loose L-ring. Swapping NU for NJ changes axial location behaviour even though the 180×34 mm envelope matches.
- The 203/217 kN ratings, 23.9 kN Pu and 3260 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for NUP220 (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 NUP220?
NUP220 is an NTN NUP single-row cylindrical roller bearing to ISO 15: 100 mm bore, 180 mm OD and 34 mm width (3.937 × 7.087 × 1.339 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 203 kN, C0 217 kN, Pu 23.9 kN, grease limiting speed 3,800 r/min, oil 4,500 r/min, mass about 3260 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. NUP220 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. NUP220 is supplied in the standard open execution shown in the table.
Can NUP220 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 NUP220?
Fw is the inner sub-assembly raceway/roller-set envelope diameter and Ew the outer-ring raceway diameter printed for geometric checks: Fw 120 mm, Ew 160 mm. The nominal bore/OD remain 100/180 mm; Fw/Ew describe the rolling-contact path, and speeds still run to 3,800 r/min grease / 4,500 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.