6576-6535 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 6576-6535 model number is decoded

For an inch shaft of 76.2 mm carrying combined radial and thrust load, NTN lists 4T-6576/6535, a single-row 4T tapered roller set of 340 kN C and 460 kN C0 inside the 161.925 mm OD cup. Letter prefixes inherited from the inch convention mark the load family: LM reads as light-medium, HM as heavy-medium, LL as extra-light, J-prefixed codes as metric-envelope families — 6576 sits in the pure-numeric inch family. Speed planning uses both catalogue columns: grease 2,300 r/min is the mechanical ceiling for 4T-6576/6535, oil 3,000 r/min with circulating oil — a 700 r/min margin at this size. The printed 340/460 kN ratings belong to the assembled 6576+6535 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. Back-to-back (O) and face-to-face (X) arrangements of two 4T-6576/6535 sets react differently to shaft bending; choose the orientation for the moment load before locking shoulder geometry.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Mount the 76.2 mm cone by induction heating (max 120 °C) and the 161.925 mm cup with a press sleeve; at 5430 g a cocked ring brinells the raceway directly.
• The pure-numeric inch family at 76.2 mm bore (161.925×53.975 mm assembled) is one of several inch families sharing similar bores; cross-series swaps change OD, T and contact angle, so match the full 6576/6535 reference at purchase.
• Do not confuse T (53.975 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 53.975 mm T logic: re-adjust the set and re-verify the contact pattern rather than reusing the old spacer stack.
• Replacing one half of an adjusted pair without resetting end play negates the 53.975 mm T logic: re-adjust the set and re-verify the contact pattern rather than reusing the old spacer stack.
• The 340/460 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-6576/6535; 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.