33017U 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 33017U model number is decoded

NTN supplies this 85 mm bore tapered roller position as 33017U: one cone assembly, one cup, line-contact rollers and a steel cage, rated 195 kN basic dynamic and 296 kN static on the slim 33000 family. The last two digits 17 are the ISO bore code, ×5 = 85 mm (codes 00–03 use the 10/12/15/17 exception table) under the ISO 355 numbering; the 36 mm value printed here is T, the width of the fully assembled cone-plus-cup set, not the inner-ring width alone. At 195 kN C the bearing offers about 2.3 kN of dynamic capacity per millimetre of the 85 mm bore — compare any substitution on this ratio and the 36 mm assembled T, not on bore alone. The 22.5 mm section height over the 85 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 33017U 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 85 mm cone by induction heating (max 120 °C) and the cup with a press sleeve; the 1690 g ring mass makes cocking during fitting a direct raceway-brinelling risk.
• The thin 36 mm section of 33017U is built for low friction and tight envelopes, not the heavy preload of a 322/323 set; over-tightening adjustment on this 85 mm bore smears the roller ends against the rib.
• The 22.5 mm section leaves little room for an oversized shaft fillet; check the mounting-chamfer table for 33017U or the ring will bottom out on the radius instead of the shoulder face.
• Grease packs must leave free volume in the 36 mm-wide set; over-greasing a paired bearing churning at the 3,500 r/min oil-band speed raises temperature and destroys the preload setting.
• Open 33017U units have no seals: a wheel-hub or gearbox application needs external sealing or the 2,600 r/min grease figure is meaningless once water reaches the cone rib.
• The 195/296 kN ratings and 35.5 kN Pu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 33017U (ISO 355 2CE); internal geometry legitimately differs between manufacturers, so re-verify ratings, adjustment and suffix before substituting another make on a rated drive.