N2312EA 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 N2312EA model number is decoded

The NTN order number N2312EA denotes a 60×130×46 mm (2.362 × 5.118 × 1.811 in) cylindrical roller bearing in the N2300 family, the EA high-capacity pressed sheet-steel cage. On the NTN nameplate N states which ring carries the ribs, which determines whether N2312EA floats or locates; the numeric remainder is the ISO 15 series and 60 mm bore reference, not a fit or clearance instruction. NTN prints the raceway diameters for this size — Fw 77 mm and Ew 115 mm — the envelope inside the 60/130 mm bore/OD where the rollers actually run. Rating life at 263 kN C assumes clean oil and adequate film; the 32 kN Pu floor means contamination derating — not the C rating alone — governs adjusted life in dusty gearboxes. Heat the inner ring to max 120 °C for the 60 mm interference fit and support the ring face square during fitting; cocking over a keyway brinells the raceway before first rotation.

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.
• If the shaft must be located both ways, do not use N2312EA 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 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.
• Grease limiting speed 4,400 r/min and oil 6,200 r/min are different limits for N2312EA: the first is the cage/lubricant mechanical ceiling, the second assumes real oil flow rather than an oil bath.
• 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 263/262 kN ratings, 32 kN Pu and 2730 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for N2312EA (EA pressed-steel-cage 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.