N1038 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 N1038 model number is decoded

NTN lists N1038 on the 190×290 mm envelope, 46 mm wide: a line-contact radial bearing with a pressed sheet-steel cage and a grease limiting speed of 2,300 r/min. On the NTN nameplate N states which ring carries the ribs, which determines whether N1038 floats or locates; the numeric remainder is the ISO 15 series and 190 mm bore reference, not a fit or clearance instruction. NTN prints two speed ceilings: 2,300 r/min grease and 2,700 r/min oil — the pressed-steel cage and lubricant film set the real limit at the 190 mm bore. Thermal planning around the 2,300 r/min grease ceiling should include the cage type (a pressed sheet-steel cage) and oil-flow option to 2,700 r/min for continuously high-duty 190 mm positions. Keep the open bearing wrapped until fitting: the line-contact raceways of the 190 mm bore indent under a single hard particle, and the steel cage provides no sealing of its own.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• At 190 mm bore, oil-lubricated arrangements toward 2,700 r/min need positive flow and drain design; the 10500 g N1038 ring stores enough heat that grease-only duty needs a careful relubrication calculation.
• The 46 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 190 mm inner ring.
• Never press either ring through the roller complement when fitting: mounting force goes through the ring faces, or the 290 mm race brinells and releases as vibration within hours.
• If the shaft must be located both ways, do not use N1038 alone: pair it with a locating bearing or specify the NUP execution with the matching loose rib ring from the 2203E table.
• If the shaft must be located both ways, do not use N1038 alone: pair it with a locating bearing or specify the NUP execution with the matching loose rib ring from the 2203E table.
• The 390/510 kN ratings, 48 kN Pu and 10500 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for N1038 (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.