NJ2313 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 NJ2313 model number is decoded

NJ2313 is an NTN NJ cylindrical roller bearing: two integral ribs on the inner ring and one rib on the outer ring — it locates the shaft in one axial direction, inside the 65×140×48 mm ISO 15 envelope. Digit by digit, NJ2313 reads as NJ (inner ring two ribs + one outer rib), ISO 15 series, and bore 65 mm; trailing letters such as EA or E mark the cage/capacity execution and are part of the order number. NTN prints two speed ceilings: 4,400 r/min grease and 5,200 r/min oil — the pressed-steel cage and lubricant film set the real limit at the 65 mm bore. The 65 mm (2.559 in) bore and 140 mm (5.512 in) OD are ISO 15 boundary values; fillet and shoulder dimensions must still come from the NTN mounting table for the 48 mm-wide ring. Heat the inner ring to max 120 °C for the 65 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 65 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 140 mm raceway.
• The EA high-capacity roller complement changes the load figure versus the basic execution of the same number; the 208/212 kN pair here belongs to NJ2313 as printed, not to the bare size.
• Do not replace NJ2313 with a deep-groove ball bearing on rating alone: line contact gives 208 kN radial capacity but the bearing cannot carry the thrust duty a ball bearing can and misalignment tolerance is only 3–4 arc-minutes.
• The EA high-capacity roller complement changes the load figure versus the basic execution of the same number; the 208/212 kN pair here belongs to NJ2313 as printed, not to the bare size.
• If the shaft must be located both ways, do not use NJ2313 alone: pair it with a locating bearing or specify the NUP execution with the matching loose rib ring from the 2203E table.
• The 208/212 kN ratings, 25.7 kN Pu and 3200 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for NJ2313 (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.