543-532X 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 543-532X model number is decoded

4T-543/532X is an NTN inch-series single-row tapered roller bearing: a separable cone-and-cup pair on the ABMA inch boundary plan, 40×107.95×36.512 mm (assembled width T), for a shaft of about 40 mm (1.575 in). Reading the designation: 4T-543/532X follows the ABMA inch convention — the number before the slash is the cone (inner ring with roller set and cage), the number after the slash is the cup (outer ring), and the pure-numeric inch family lettering ties the pair to its boundary plan. The 34.0 mm radial section over the 40 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 157/177 kN ratings belong to the assembled 543+532X 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. Minimum load matters at speed: an unloaded 4T-543/532X run near 3,600 r/min lets the rollers skid; lightly spring-preload high-speed pair arrangements.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Hub and pinion positions of this 40 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-543/532X.
• The pure-numeric inch family at 40 mm bore (107.95×36.512 mm assembled) is one of several inch families sharing similar bores; cross-series swaps change OD, T and contact angle, so match the full 543/532X reference at purchase.
• Do not confuse T (36.512 mm, the assembled cone-plus-cup width) with the cone width when drawing spacers; an abutment sized to T leaves the cup unseated.
• Replacing one half of an adjusted pair without resetting end play negates the 36.512 mm T logic: re-adjust the set and re-verify the contact pattern rather than reusing the old spacer stack.
• Inch and metric bores collide on paper — 40 mm is 1.575 in, not a round metric size; a metric bearing that seems 0.1 mm off will not seat on the inch shaft.
• The 157/177 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-543/532X; 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.