33214U 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 33214U model number is decoded

33214U is the NTN 4T catalogue entry for a 70×125×41 mm metric tapered roller bearing — separable cone and cup, designed for combined radial and axial load as an individually adjusted bearing. Reading the designation: the leading five digits follow the ISO 355 metric plan (dimension family plus two-digit bore code), and 33214U resolves to 70 mm bore; the NTN factory mark 4T is stamped on cone and cup but is a brand mark, not a size code, so the catalogue sku is printed without it. A tapered roller bearing reacts combined radial and one-direction axial load; NTN mounts 33214U cone and cup separately and adjusts end play or preload against a second bearing, so the arrangement locates the shaft in both directions. The 27.5 mm section height over the 70 mm bore positions the load centre; axial location of the pair depends on that contact line, so spacer faces must be square within the P0 tolerance of the bearing. Re-adjustment after bedding-in is standard practice: re-check end play once the paired 33214U arrangement has run in, because initial seat seating relaxes the set preload slightly.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Mount the 70 mm cone by induction heating (max 120 °C) and the cup with a press sleeve; the 2120 g ring mass makes cocking during fitting a direct raceway-brinelling risk.
• The medium-wide 33200 family at 70 mm bore (125×41 mm assembled) carries more capacity than the lighter 320/329 sections but generates more preload heat; confirm oil availability before running near the 3,900 r/min oil ceiling.
• Replacing one half of an adjusted pair without resetting end play negates the 41 mm T dimension logic: re-adjust the set and re-verify the contact pattern rather than reusing the old spacer stack.
• The 27.5 mm section leaves little room for an oversized shaft fillet; check the mounting-chamfer table for 33214U or the ring will bottom out on the radius instead of the shoulder face.
• Do not confuse T (41 mm assembled width of cone + cup) with the cone width when drawing spacers; an abutment sized to T instead of the ring width leaves the cup unseated.
• The 223/282 kN ratings and 34.5 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 33214U (ISO 355 3EE); internal geometry legitimately differs between manufacturers, so re-verify ratings, adjustment and suffix before substituting another make on a rated drive.