430214 bearing: complete specifications & equivalents
The 430214 is a ANSI ABMA 19.2 radial bearing sized 70 x 125 x 59 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 70 mm |
| Outer diameter D | 125 mm |
| Width B | 59 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 250 kN |
| Basic static load rating C0 | 325 kN |
| Limiting speed (mechanical) | 2400 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 2830 g |
| Manufacturer designation | NTN 4T-430214 |
| 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-430-series range
| Bore d | 2.756 in |
|---|---|
| Outer diameter D | 4.921 in |
| Width B | 2.323 in |
| ISO bore code | 14 |
| Radial section height (D−d)/2 | 27.5 mm |
| Smallest bore in 4t-430-series | 40 mm |
| Largest outer diameter in 4t-430-series | 870 mm |
| Width range across 4t-430-series | 45–310 mm |
| Bore position in 4t-430-series (smallest first) | 7 of 41 |
| Bore above smallest 4t-430-series size | 30 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 430214 | 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 430214 model number is decoded
NTN supplies this 70 mm shaft position as 4T-430214: a factory-adjusted double-row tapered roller bearing whose two roller rows share one double cup, overall width 59 mm. Reading the designation: the last two digits 14 are the bore code, ×5 = 70 mm (codes 00–03 use the 10/12/15/17 exception table); the leading digits place the bearing in the light-duty 430-family TDO double-row series. The 27.5 mm radial section over the 70 mm bore carries two roller rows across the 59 mm width; abutment shoulders must clear both cone bores and the double-cup OD. The internal clearance of 4T-430214 is set at the factory by the double cup and spacer-less grinding; do not attempt to re-adjust it with shaft nuts — the 59 mm overall width is the finished dimension. At 250 kN C the unit offers about 3.6 kN per millimetre of the 70 mm bore — heavy-section TDO rows of this class run warm, so confirm oil availability before working near 3,200 r/min.
Typical equipment & failure modes
Common applications
- bulk-handling stacker/reclaimer travel drives
- large mixer and agitator shafts
- heavy gearbox and mill drive shafts
- crusher and screening-plant main shafts
Known failure patterns
- edge loading on one row when the housing seats the double cup cocked across its width
- brinelling of both rows from a mounting blow transmitted through the roller complements
- preload loss and hammering noise when the cup clamping loosens and the unit gains axial float
- cage fatigue after continuous running near the grease limiting speed without oil cooling
- indentation of both raceways by hard particles in an open, unsealed arrangement
Selection pitfalls — read before you substitute
- Mount the 70 mm unit by induction heating (max 120 °C); at 2.83 kg a cocked lift damages the cages and ribs before the bearing ever runs.
- The 430 light plan keeps 4T-430214 narrower and faster than the 432 heavy execution of the same 70 mm bore; where shock or a high thrust share dominates, verify whether the heavier 432-family row is the intended position.
- Never interchange a TDO double-row unit with two single-row bearings of similar size: the 59 mm width, load spread and clearance logic of 4T-430214 are unit-specific.
- An unloaded 4T-430214 near 2,400 r/min lets rollers skid; ensure a minimum load or light spring preload on high-speed positions.
- Open 4T-430214 units have no seals: the housing must seal both rows or the 2,400 r/min grease figure is meaningless once contamination enters.
- The 250/325 kN ratings here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-430214; internal geometry legitimately differs between manufacturers, so re-verify ratings, clearance class and suffix before substituting another make on a rated drive.
Frequently asked questions
What are the dimensions and catalogue ratings of NTN 4T-430214?
4T-430214 is a double-row tapered roller bearing of TDO (back-to-back) construction: 70 mm bore, 125 mm outside diameter and 59 mm overall width. From NTN Ball and Roller Bearings CAT.No.2203E: C 250 kN, C0 325 kN (2203E prints a dash for Cu on this size), grease limiting speed 2,400 r/min, oil speed 3,200 r/min, mass about 2.83 kg. It is an open, preset-clearance unit with pressed-steel cages.
What is the difference between the NTN 430 and 432 double-row series at 70 mm bore?
Both are TDO double-row tapered roller units, but 430 is the light plan and 432 the heavy plan: at the same bore the 432 execution is wider and heavier with higher load ratings. 4T-430214 belongs to the light-duty 430-family TDO double-row series. Large sizes continue the plans as 4130/4131/4230/4231 (430 family) and 3230/3231 (432 family).
Can the internal clearance of 4T-430214 be adjusted at mounting?
No. The TDO unit — two cone assemblies against one double cup — is ground and set by NTN at the factory, and the 59 mm overall width is the finished dimension. Mounting sets no end play: seat the unit square, clamp the cup uniformly and verify free rotation. Field re-adjustment overloads one row.
What do the suffix letters on 430214 mean?
With no letter suffix, 430214 is the basic open double-row execution: steel cages, factory-set internal clearance, no feature suffix in the order code.
Why does 4T-430214 list two speeds, 2,400 and 3,200 r/min?
The lower figure, 2,400 r/min, is the grease-lubricated limiting speed for the two rows and their cages. With oil lubrication NTN rates 4T-430214 at 3,200 r/min because oil removes heat from both roller rows better — the housing feed must reach both rows through the double cup.
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.