663-652 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 663-652 model number is decoded

The NTN 2203E inch table prints 4T-663/652 at 82.55 mm bore (3.25 in), 152.4 mm cup OD and 41.275 mm assembled T, with a grease limiting speed of 2,500 r/min and an oil ceiling of 3,300 r/min. Cone and cup of 4T-663/652 are separately stocked parts: a worn 652 cup can be replaced against the existing 663 cone, provided the new cup carries the identical reference — pairing across references changes the 41.275 mm assembled width and the rating. The 34.9 mm radial section over the 82.55 mm bore positions the contact line of the pair; abutment shoulders and spacers are dimensioned from that geometry, not from the bore alone. Housing fitment sequence for 4T-663/652: press the 652 cup square into the 152.4 mm seat first, then bring the 663 cone (on its 82.55 mm shaft) into adjustment — the two references are separate engineering parts that happen to ship as one set. Fillet radii must clear the chamfers of the 663 cone and 652 cup; undercut shoulders seat the rings fully instead of bridging on a radius.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Mount the 82.55 mm cone by induction heating (max 120 °C) and the 152.4 mm cup with a press sleeve; at 3160 g a cocked ring brinells the raceway directly.
• The pure-numeric inch family at 82.55 mm bore (152.4×41.275 mm assembled) is one of several inch families sharing similar bores; cross-series swaps change OD, T and contact angle, so match the full 663/652 reference at purchase.
• Replacing one half of an adjusted pair without resetting end play negates the 41.275 mm T logic: re-adjust the set and re-verify the contact pattern rather than reusing the old spacer stack.
• Fit selection follows the rotating ring: a rotating cone on a 82.55 mm shaft takes a k5/m5 seat, and a rotating cup reverses the logic — decide from the load diagram, not from habit.
• Replacing one half of an adjusted pair without resetting end play negates the 41.275 mm T logic: re-adjust the set and re-verify the contact pattern rather than reusing the old spacer stack.
• The 228/295 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-663/652; 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.