H414242-H414210 bearing: complete specifications & equivalents
The H414242-H414210 is a ANSI ABMA 19.2 radial bearing sized 66.675 x 136.525 x 41.275 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 66.675 mm |
| Outer diameter D | 136.525 mm |
| Width B | 41.275 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 251 kN |
| Basic static load rating C0 | 293 kN |
| Limiting speed (mechanical) | 2700 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 2750 g |
| Manufacturer designation | NTN 4T-H414242/H414210 |
| Standard | ANSI ABMA 19.2 |
| Catalog version | NTN 2203E 2026-09-25 |
| Last verified | 2026-10-01 |
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.
Dimensions in inches & 4t-inch-series range
| Bore d | 2.625 in |
|---|---|
| Outer diameter D | 5.375 in |
| Width B | 1.625 in |
| ISO bore code | 42 |
| Radial section height (D−d)/2 | 34.9 mm |
| Smallest bore in 4t-inch-series | 12.7 mm |
| Largest outer diameter in 4t-inch-series | 260 mm |
| Width range across 4t-inch-series | 10.998–77.788 mm |
| Bore position in 4t-inch-series (smallest first) | 84 of 148 |
| Bore above smallest 4t-inch-series size | 53.974999999999994 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| H414242 | ISO 15 | full Dimensions and internal design equivalent — standard interchange. | ISO 15 boundary-dimension envelope; brand-specific OEM equivalents (NSK/FAG/NTN) pending multi-source data. |
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 H414242-H414210 model number is decoded
NTN supplies this 2.625 in (66.675 mm) shaft position as 4T-H414242/H414210: cone H414242, cup H414210, profiled rollers and a pressed-steel cage, rated 251 kN basic dynamic and 293 kN static. Unlike ISO 355 metric numbers, this ABMA code does not encode the bore arithmetically: H414242 identifies the cone of 66.675 mm (2.625 in) bore by catalogue lookup, and H414210 fixes the 136.525 mm OD. The 3.8 kN of dynamic capacity per millimetre of bore summarises the 251 kN rating over the 66.675 mm bore — sanity-check any interchange candidate against this ratio and the 41.275 mm T. Cup-side note for H414210: within the heavy H family tables the H414242 cone is listed against several cup options, and it is the cup that fixes the 136.525 mm OD and the 41.275 mm assembled width — quote the full H414242/H414210 pair, never the cone alone. Minimum load matters at speed: an unloaded 4T-H414242/H414210 run near 2,700 r/min lets the rollers skid; lightly spring-preload high-speed pair arrangements.
Typical equipment & failure modes
Common applications
- paper-machine and calender roll supports
- off-highway and forestry machine axles
- marine winch and deck-machinery shafts
- crusher and screening-plant eccentric shafts
Known failure patterns
- cone-rib and roller large-end smearing when the adjusted pair runs with preload but starved lubricant film
- preload loss and noise after one bearing of the adjusted pair is replaced without resetting end play
- false brinelling on a stationary pair exposed to vibration during transport or standby
- cage fatigue when the pair runs continuously near the grease limiting speed without oil cooling
- brinell marks on cone and cup raceways from impact during handling or hammer fitting
Selection pitfalls — read before you substitute
- Mount the 66.675 mm cone by induction heating (max 120 °C) and the 136.525 mm cup with a press sleeve; at 2750 g a cocked ring brinells the raceway directly.
- The heavy H family at 66.675 mm bore (136.525×41.275 mm assembled) is one of several inch families sharing similar bores; cross-series swaps change OD, T and contact angle, so match the full H414242/H414210 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.
- Never drive the 136.525 mm cup home through the rollers: fitting force goes through the ring faces only, or brinell marks release as noise within the first running hours.
- Quote the full H414242/H414210 pair at ordering: the H414242 cone also ships against sibling cups, and a cup from another reference changes the 41.275 mm assembled width and the rating.
- The 251/293 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-H414242/H414210; 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.
Frequently asked questions
What are the dimensions and catalogue ratings of NTN 4T-H414242/H414210?
4T-H414242/H414210 is an inch-series single-row tapered roller bearing to the ABMA boundary plan: 66.675 mm bore (2.625 in), 136.525 mm outside diameter and 41.275 mm assembled width T (5.375 × 1.625 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 251 kN, C0 293 kN, grease limiting speed 2,700 r/min, oil speed 3,700 r/min, mass about 2750 g. It is an open, separable cone/cup set with a pressed-steel cage.
Are the cone and cup of 4T-H414242/H414210 interchangeable separately?
Yes — ABMA inch parts are individually interchangeable: the H414242 cone or the H414210 cup can be replaced by an identical reference from NTN or another ABMA-dimensioned maker. Pairing the cone with a different cup reference is a different catalogue row: OD, assembled T and the 251/293 kN ratings change with the cup.
What is the difference between 4T-H414242/H414210 and a metric ISO 355 tapered bearing?
4T-H414242/H414210 follows the ABMA inch boundary plan with cone/cup references; ISO 355 bearings use metric dimension-series numbers (302, 322, …). Even where a metric size looks close to 66.675×136.525×41.275 mm, the envelopes and contact angles differ — the two systems are not drop-in interchangeable; check every boundary value before substituting.
What does the 4T prefix on 4T-H414242/H414210 mean?
4T is NTN's tapered roller bearing quality mark, stamped on cone and cup in the factory. It identifies NTN's 4T programme and is not a dimension or variant code, so interchange lists quote the bare H414242/H414210 references; the 4T spelling is retained among this page's search aliases.
Why does 4T-H414242/H414210 list two speeds, 2,700 and 3,700 r/min?
The lower figure, 2,700 r/min, is the grease-lubricated limiting speed — the mechanical ceiling for the cage, rollers and cone-rib contact. With oil lubrication NTN rates 4T-H414242/H414210 at 3,700 r/min because oil removes rib-contact heat better. Real limits still depend on pair adjustment, oil flow and cooling.
Reviewed & verified by the MPN Base engineering desk against source catalog NTN 2203E 2026-09-25 on 2026-10-01. Read our editorial & correction policy.