NU1080 bearing: complete specifications & equivalents

Specification table

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.

Cross references & equivalents

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 NU1080 model number is decoded

NU1080 is the extra-light (10/49) section of the NTN NU1000 dimension series for a 400 mm shaft — 1460 kN of basic dynamic capacity in a 86300 g, open bearing. Numbering ties NU1080 to its envelope: type code NU, series NU1000, 400 mm bore; the 600×90 mm outline therefore swaps dimensionally with other ISO 15 bearings of the same code, though rib arrangements differ by prefix. NTN prints two speed ceilings: 990 r/min grease and 1,200 r/min oil — the pressed-steel cage and lubricant film set the real limit at the 400 mm bore. Thermal planning around the 990 r/min grease ceiling should include the cage type (a pressed sheet-steel cage) and oil-flow option to 1,200 r/min for continuously high-duty 400 mm positions. 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 NU1080.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• At 400 mm bore, oil-lubricated arrangements toward 1,200 r/min need positive flow and drain design; the 86300 g NU1080 ring stores enough heat that grease-only duty needs a careful relubrication calculation.
• If the shaft must be located both ways, do not use NU1080 alone: pair it with a locating bearing or specify the NUP execution with the matching loose rib ring from the 2203E table.
• Wide (22/23) and light (10/49) executions at 400 mm bore share bore but not OD/width; check the full NU1000 series code before substituting, because housing and shoulder geometry will not interchange.
• Do not replace NU1080 with a deep-groove ball bearing on rating alone: line contact gives 1460 kN radial capacity but the bearing cannot carry the thrust duty a ball bearing can and misalignment tolerance is only 3–4 arc-minutes.
• If the shaft must be located both ways, do not use NU1080 alone: pair it with a locating bearing or specify the NUP execution with the matching loose rib ring from the 2203E table.
• The 1460/2190 kN ratings, 164 kN Pu and 86300 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for NU1080 (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.