898-892-NTN bearing: complete specifications & equivalents
The 898-892-NTN is a ANSI ABMA 19.2 radial bearing sized 139.7 x 228.6 x 57.15 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 139.7 mm |
| Outer diameter D | 228.6 mm |
| Width B | 57.15 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 495 kN |
| Basic static load rating C0 | 735 kN |
| Limiting speed (mechanical) | 1500 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 8810 g |
| Manufacturer designation | NTN 4T-898/892 |
| 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 | 5.5 in |
|---|---|
| Outer diameter D | 9 in |
| Width B | 2.25 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 44.5 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) | 138 of 148 |
| Bore above smallest 4t-inch-series size | 126.99999999999999 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 898-892 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 139.7×228.6×57.15 mm envelope per ISO 15; catalogue load ratings differ by >10% — re-rate the application before substituting. |
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 898-892-NTN model number is decoded
In NTN Ball and Roller Bearings CAT.No.2203E, the order number 4T-898/892 denotes the pure-numeric inch family of NTN inch tapered roller bearings — cone 898 and cup 892 delivered as a matched, separable pair of 139.7 mm bore and 228.6 mm outside diameter. Unlike ISO 355 metric numbers, this ABMA code does not encode the bore arithmetically: 898 identifies the cone of 139.7 mm (5.5 in) bore by catalogue lookup, and 892 fixes the 228.6 mm OD. Grease relubrication at the 1,500 r/min limiting speed targets the cone-rib contact; sustaining 2,000 r/min needs an oil supply directed at the large roller ends. The printed 495/735 kN ratings belong to the assembled 898+892 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. Minimum load matters at speed: an unloaded 4T-898/892 run near 1,500 r/min lets the rollers skid; lightly spring-preload high-speed pair arrangements.
Typical equipment & failure modes
Common applications
- rolling-mill pinion stands and roll-neck auxiliaries
- mine hoist and dragline drum shafts
- heavy press and forging-machine drive shafts
- port-crane travel and hoist gearboxes
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
- pressed-steel cage pocket wear from roller skid at light radial load and high speed
- water-induced pitting when the open bearing sees washdown without external seals
Selection pitfalls — read before you substitute
- At 139.7 mm bore the 4T-898/892 set is adjusted with hydraulic nuts or measured shims on mill and crane positions; manual torque methods cannot control preload at the 495 kN C level.
- The pure-numeric inch family at 139.7 mm bore (228.6×57.15 mm assembled) is one of several inch families sharing similar bores; cross-series swaps change OD, T and contact angle, so match the full 898/892 reference at purchase.
- Never drive the 228.6 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.
- Grease packs must leave free volume inside the 57.15 mm-wide set; over-greasing a pair churning near the oil-band speed of 2,000 r/min raises temperature and destroys the setting.
- An unloaded 4T-898/892 near 1,500 r/min lets rollers skid and smear the cone rib; spring-preload lightly loaded high-speed pairs.
- The 495/735 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-898/892; 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-898/892?
4T-898/892 is an inch-series single-row tapered roller bearing to the ABMA boundary plan: 139.7 mm bore (5.5 in), 228.6 mm outside diameter and 57.15 mm assembled width T (9 × 2.25 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 495 kN, C0 735 kN, grease limiting speed 1,500 r/min, oil speed 2,000 r/min, mass about 8810 g. It is an open, separable cone/cup set with a pressed-steel cage.
Are the cone and cup of 4T-898/892 interchangeable separately?
Yes — ABMA inch parts are individually interchangeable: the 898 cone or the 892 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 495/735 kN ratings change with the cup.
What is the difference between 4T-898/892 and a metric ISO 355 tapered bearing?
4T-898/892 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 139.7×228.6×57.15 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-898/892 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 898/892 references; the 4T spelling is retained among this page's search aliases.
Why does 4T-898/892 list two speeds, 1,500 and 2,000 r/min?
The lower figure, 1,500 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-898/892 at 2,000 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.