H917840-H917810 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 H917840-H917810 model number is decoded

In NTN Ball and Roller Bearings CAT.No.2203E, the order number 4T-H917840/H917810 denotes the heavy H family of NTN inch tapered roller bearings — cone H917840 and cup H917810 delivered as a matched, separable pair of 76.2 mm bore and 180.975 mm outside diameter. Unlike ISO 355 metric numbers, this ABMA code does not encode the bore arithmetically: H917840 identifies the cone of 76.2 mm (3 in) bore by catalogue lookup, and H917810 fixes the 180.975 mm OD. The 4.7 kN of dynamic capacity per millimetre of bore summarises the 360 kN rating over the 76.2 mm bore — sanity-check any interchange candidate against this ratio and the 53.975 mm T. Housing fitment sequence for 4T-H917840/H917810: press the H917810 cup square into the 180.975 mm seat first, then bring the H917840 cone (on its 76.2 mm shaft) into adjustment — the two references are separate engineering parts that happen to ship as one set. Back-to-back (O) and face-to-face (X) arrangements of two 4T-H917840/H917810 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 180.975 mm cup with a press sleeve; at 6570 g a cocked ring brinells the raceway directly.
• The heavy H family at 76.2 mm bore (180.975×53.975 mm assembled) is one of several inch families sharing similar bores; cross-series swaps change OD, T and contact angle, so match the full H917840/H917810 reference at purchase.
• 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.
• Quote the full H917840/H917810 pair at ordering: the H917840 cone also ships against sibling cups, and a cup from another reference changes the 53.975 mm assembled width and the rating.
• Fit selection follows the rotating ring: a rotating cone on a 76.2 mm shaft takes a k5/m5 seat, and a rotating cup reverses the logic — decide from the load diagram, not from habit.
• The 360/415 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-H917840/H917810; 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.