N2312 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 N2312 model number is decoded

In NTN Ball and Roller Bearings CAT.No.2203E, N2312 appears as a 60 mm bore single-row cylindrical roller bearing (187 kN C / 188 kN C0) with a pressed sheet-steel cage, listed to the ISO 15 boundary plan. The leading N defines the rib arrangement (inner ring ribbed, outer ring ribless); the dimension-series digits and the two-digit bore code resolve to 60 mm, with 130 mm OD and 46 mm width from the ISO 15 general plan. NTN prints the raceway diameters for this size — Fw 77 mm and Ew 113 mm — the envelope inside the 60/130 mm bore/OD where the rollers actually run. The 3.1 kN-per-mm-bore figure (187 kN over 60 mm) lets a N2312 interchange candidate be screened quickly against the same-envelope ball or roller alternatives. After mounting verify the outer ring slides axially by hand at ambient temperature; a stuck float ring in a N2312 non-locating position preloads the bearing when the shaft grows.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Induction-heat the 60 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 130 mm raceway.
• Open N2312 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 60 mm contact.
• 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 60 mm inner ring.
• Wide (22/23) and light (10/49) executions at 60 mm bore share bore but not OD/width; check the full N2300 series code before substituting, because housing and shoulder geometry will not interchange.
• The N rib arrangement is not interchangeable with another prefix on the same 60 mm seat: inner ring ribbed, outer ring ribless. Swapping NU for NJ changes axial location behaviour even though the 130×46 mm envelope matches.
• The 187/188 kN ratings, 22.9 kN Pu and 2660 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for N2312 (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.