JHM534149-JHM534110 bearing: complete specifications & equivalents
The JHM534149-JHM534110 is a ANSI ABMA 19.2 radial bearing sized 170 x 230 x 39 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 170 mm |
| Outer diameter D | 230 mm |
| Width B | 39 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 310 kN |
| Basic static load rating C0 | 520 kN |
| Limiting speed (mechanical) | 1400 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 4370 g |
| Manufacturer designation | NTN 4T-JHM534149/JHM534110 |
| 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 | 6.693 in |
|---|---|
| Outer diameter D | 9.055 in |
| Width B | 1.535 in |
| ISO bore code | 49 |
| Radial section height (D−d)/2 | 30 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) | 144 of 148 |
| Bore above smallest 4t-inch-series size | 157.3 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| JHM534149 | 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 JHM534149-JHM534110 model number is decoded
NTN supplies this 6.693 in (170 mm) shaft position as 4T-JHM534149/JHM534110: cone JHM534149, cup JHM534110, profiled rollers and a pressed-steel cage, rated 310 kN basic dynamic and 520 kN static. The 4T prefix is NTN's tapered roller quality mark stamped on both parts; it is a brand mark, not a size code, so cross-references quote JHM534149/JHM534110 without it. Selection: C 310 kN against C0 520 kN gives a C0/C ratio of 1.68 for the 170 mm bore; the pair is counted as one adjusted unit when checking L10 at the equivalent combined load. The printed 310/520 kN ratings belong to the assembled JHM534149+JHM534110 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. Contact-pattern check with marking blue: a pattern biased to one roller end means the 170 mm pair is misadjusted and the set will edge-load in service.
Typical equipment & failure modes
Common applications
- large shredder and recycler main shafts
- power-plant coal-mill and fan shafts
- rolling-mill pinion stands and roll-neck auxiliaries
- mine hoist and dragline drum shafts
Known failure patterns
- rib-face scoring when the thrust share of the combined load exceeds what the cone rib of this size carries
- flaking on one cone only when a bent shaft loads the O/X pair unevenly
- cup creep and housing fretting when the cup seat is cut too loose for the rotating load
- cage damage from a mounting blow transmitted through the roller complement
- water-induced pitting when the open bearing sees washdown without external seals
Selection pitfalls — read before you substitute
- At 170 mm bore the 4T-JHM534149/JHM534110 set is adjusted with hydraulic nuts or measured shims on mill and crane positions; manual torque methods cannot control preload at the 310 kN C level.
- The J-prefixed JHM534149 code belongs to a metric-envelope inch family: its 170 mm bore is a round metric figure, yet the part still follows ABMA cone/cup numbering — do not substitute an ISO 355 metric 302/322 bearing of the same bore without checking OD, T and contact angle.
- Grease packs must leave free volume inside the 39 mm-wide set; over-greasing a pair churning near the oil-band speed of 1,800 r/min raises temperature and destroys the setting.
- Fit selection follows the rotating ring: a rotating cone on a 170 mm shaft takes a m6/n6 seat, and a rotating cup reverses the logic — decide from the load diagram, not from habit.
- Inch and metric bores collide on paper — 170 mm is 6.693 in, not a round metric size; a metric bearing that seems 0.1 mm off will not seat on the inch shaft.
- The 310/520 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-JHM534149/JHM534110; 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-JHM534149/JHM534110?
4T-JHM534149/JHM534110 is an inch-series single-row tapered roller bearing to the ABMA boundary plan: 170 mm bore (6.693 in), 230 mm outside diameter and 39 mm assembled width T (9.055 × 1.535 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 310 kN, C0 520 kN, grease limiting speed 1,400 r/min, oil speed 1,800 r/min, mass about 4370 g. It is an open, separable cone/cup set with a pressed-steel cage.
Are the cone and cup of 4T-JHM534149/JHM534110 interchangeable separately?
Yes — ABMA inch parts are individually interchangeable: the JHM534149 cone or the JHM534110 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 310/520 kN ratings change with the cup.
What is the difference between 4T-JHM534149/JHM534110 and a metric ISO 355 tapered bearing?
4T-JHM534149/JHM534110 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 170×230×39 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-JHM534149/JHM534110 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 JHM534149/JHM534110 references; the 4T spelling is retained among this page's search aliases.
Why does 4T-JHM534149/JHM534110 list two speeds, 1,400 and 1,800 r/min?
The lower figure, 1,400 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-JHM534149/JHM534110 at 1,800 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.