25590-25522-NTN bearing: complete specifications & equivalents

Specification table

Source: catalog reference (NTN 2203E 2026-09-25) · extracted 2026-10-01

Parameters extracted from the official NTN Ball and Roller Bearings catalogue (NTN 2203E 2026-09-25); 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 25590-25522-NTN model number is decoded

In NTN Ball and Roller Bearings CAT.No.2203E, the order number 4T-25590/25522 denotes the pure-numeric inch family of NTN inch tapered roller bearings — cone 25590 and cup 25522 delivered as a matched, separable pair of 45.618 mm bore and 83.058 mm outside diameter. Cone and cup of 4T-25590/25522 are separately stocked parts: a worn 25522 cup can be replaced against the existing 25590 cone, provided the new cup carries the identical reference — pairing across references changes the 23.876 mm assembled width and the rating. The 18.7 mm radial section over the 45.618 mm bore positions the contact line of the pair; abutment shoulders and spacers are dimensioned from that geometry, not from the bore alone. The printed 84.5/98 kN ratings belong to the assembled 25590+25522 pair; a sibling row using the same cone with a different cup carries its own rating row because the raceway track shifts with the cup. The rollers run with their large ends against the cone's guide rib; lubricant must reach that rib face of 4T-25590/25522, not only the raceway, or the pair smears on the first overloaded start.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Hub and pinion positions of this 45.618 mm class are adjusted in pairs; verify end play against the axle or gearbox drawing and re-torque after bedding-in instead of trusting the first setting on 4T-25590/25522.
• The pure-numeric inch family at 45.618 mm bore (83.058×23.876 mm assembled) is one of several inch families sharing similar bores; cross-series swaps change OD, T and contact angle, so match the full 25590/25522 reference at purchase.
• Inch and metric bores collide on paper — 45.618 mm is 1.796 in, not a round metric size; a metric bearing that seems 0.1 mm off will not seat on the inch shaft.
• ABMA makes the 45.618×83.058 mm envelope interchangeable, not the ratings: NTN prints 84.5/98 kN for this execution and another make of the same number can differ in roller complement.
• Fit selection follows the rotating ring: a rotating cone on a 45.618 mm shaft takes a k5/m5 seat, and a rotating cup reverses the logic — decide from the load diagram, not from habit.
• The 84.5/98 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-25590/25522; internal geometry legitimately differs between inch-series makers, so re-verify ratings, adjustment and the exact cone/cup references before substituting another brand on a rated drive.