430315DU 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 430315DU model number is decoded

In NTN Ball and Roller Bearings CAT.No.2203E, the order number 4T-430315DU denotes the light-duty 430-family TDO double-row series — a 75 mm bore double-row tapered unit rated 410 kN basic dynamic and 510 kN static. Unlike a pair of single-row bearings, the TDO unit of 4T-430315DU integrates both rows in one article: the 87 mm overall width and the internal clearance are ground and set by NTN, so there is no field adjustment dimension. The 42.5 mm radial section over the 75 mm bore carries two roller rows across the 87 mm width; abutment shoulders must clear both cone bores and the double-cup OD. The internal clearance of 4T-430315DU is set at the factory by the double cup and spacer-less grinding; do not attempt to re-adjust it with shaft nuts — the 87 mm overall width is the finished dimension. Fillet radii and shoulder heights must follow the 2203E mounting table for 4T-430315DU; the double cup must seat square across its full 87 mm width.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Mount the 75 mm unit by induction heating (max 120 °C); at 7.31 kg a cocked lift damages the cages and ribs before the bearing ever runs.
• The 430 light plan keeps 4T-430315DU narrower and faster than the 432 heavy execution of the same 75 mm bore; where shock or a high thrust share dominates, verify whether the heavier 432-family row is the intended position.
• The 42.5 mm section leaves little room for oversized shaft fillets; follow the 2203E chamfer table for 4T-430315DU or the cones bottom out on the radius.
• An unloaded 4T-430315DU near 1,700 r/min lets rollers skid; ensure a minimum load or light spring preload on high-speed positions.
• At inspection do not mix the cone assemblies of 4T-430315DU with another unit; rows are ground together and re-matching is not guaranteed in the field.
• The 410/510 kN ratings and 59.5 kN Cu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-430315DU; internal geometry legitimately differs between manufacturers, so re-verify ratings, clearance class and suffix before substituting another make on a rated drive.