N2228 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 N2228 model number is decoded

In NTN Ball and Roller Bearings CAT.No.2203E, N2228 appears as a 140 mm bore single-row cylindrical roller bearing (495 kN C / 635 kN C0) with a pressed sheet-steel cage, listed to the ISO 15 boundary plan. Digit by digit, N2228 reads as N (inner ring ribbed, outer ring ribless), ISO 15 series, and bore 140 mm; trailing letters such as EA or E mark the cage/capacity execution and are part of the order number. The separable ring comes off without removing the roller assembly from the other ring, which eases inspection and lets the non-locating arrangement accommodate thermal shaft growth. Rating life at 495 kN C assumes clean oil and adequate film; the 63.5 kN Pu floor means contamination derating — not the C rating alone — governs adjusted life in dusty gearboxes. Provide axial location with an adjacent locating bearing rather than expecting the float cylindrical set to hold thrust on the 140 mm shaft.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• At 140 mm bore, oil-lubricated arrangements toward 2,800 r/min need positive flow and drain design; the 12600 g N2228 ring stores enough heat that grease-only duty needs a careful relubrication calculation.
• Minimum radial load is frequently missed in oversized motor and fan selections: an underloaded N2228 skids at 2,400 r/min and fails by smearing long before L10 fatigue.
• The 68 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 140 mm inner ring.
• The N rib arrangement is not interchangeable with another prefix on the same 140 mm seat: inner ring ribbed, outer ring ribless. Swapping NU for NJ changes axial location behaviour even though the 250×68 mm envelope matches.
• The EA high-capacity roller complement changes the load figure versus the basic execution of the same number; the 495/635 kN pair here belongs to N2228 as printed, not to the bare size.
• The 495/635 kN ratings, 63.5 kN Pu and 12600 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for N2228 (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.