432310U 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 432310U model number is decoded

4T-432310U is the NTN 4T catalogue entry for a 50×110×90 mm double-row tapered roller bearing — the TDO arrangement reacts radial load plus thrust in both directions without a second bearing. Large sizes continue the plans under different leading digits: 4130/4131 and 4230/4231 belong to the 430-family dimension plan, while 3230/3231 continue the 432 heavy plan — 432310U reads accordingly. Axial capacity is bidirectional because the rows are opposed: 4T-432310U locates the shaft in both directions with C0 465 kN behind the static check of the more heavily loaded row. Because the unit is preset, mounting 4T-432310U resembles mounting a double-row spherical or cylindrical bearing: seat the unit, clamp axially to the stated end cover torque, and verify rotation — no end-play measurement is required. Fillet radii and shoulder heights must follow the 2203E mounting table for 4T-432310U; the double cup must seat square across its full 90 mm width.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Gearbox positions of this 50 mm class rely on the preset clearance of 4T-432310U; shimming or nut-tightening the unit like a single-row pair overruns the factory setting and runs the rows hot.
• The 432 heavy plan gives 4T-432310U its 90 mm width and 350 kN rating at the 50 mm bore; do not downgrade to a 430-family unit of the same bore without re-checking C, C0 and the 56.5 kN Cu.
• The 350 kN C already includes two-row load sharing — do not double it when pairing the unit with a floating bearing in the L10 calculation.
• Open 4T-432310U units have no seals: the housing must seal both rows or the 3,000 r/min grease figure is meaningless once contamination enters.
• The internal clearance of 4T-432310U is factory-set: no end-play adjustment exists at mounting, and any attempt to set preload with a shaft nut overloads one row.
• The 350/465 kN ratings and 56.5 kN Cu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-432310U; internal geometry legitimately differs between manufacturers, so re-verify ratings, clearance class and suffix before substituting another make on a rated drive.