323160UTG bearing: complete specifications & equivalents
The 323160UTG is a ANSI ABMA 19.2 radial bearing sized 300 x 500 x 160 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 300 mm |
| Outer diameter D | 500 mm |
| Width B | 160 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 2690 kN |
| Basic static load rating C0 | 4050 kN |
| Fatigue load limit Pu | 325 kN |
| Limiting speed (mechanical) | 540 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 130000 g |
| Manufacturer designation | NTN 4T-323160UTG |
| 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-432-series range
| Bore d | 11.811 in |
|---|---|
| Outer diameter D | 19.685 in |
| Width B | 6.299 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 100 mm |
| Smallest bore in 4t-432-series | 40 mm |
| Largest outer diameter in 4t-432-series | 790 mm |
| Width range across 4t-432-series | 46–266 mm |
| Bore position in 4t-432-series (smallest first) | 29 of 39 |
| Bore above smallest 4t-432-series size | 260 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 323160UTG | 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 323160UTG model number is decoded
4T-323160UTG is the NTN 4T catalogue entry for a 300×500×160 mm double-row tapered roller bearing — the TDO arrangement reacts radial load plus thrust in both directions without a second bearing. The 4T- prefix is NTN's tapered roller quality mark; 430 numbers the light TDO plan and 432 the heavy TDO plan — at the same 300 mm bore the 432 execution carries a wider, heavier section than the 430. Axial capacity is bidirectional because the rows are opposed: 4T-323160UTG locates the shaft in both directions with C0 4050 kN behind the static check of the more heavily loaded row. TDO construction means the two cone assemblies of 4T-323160UTG face away from each other inside one double cup: the load lines diverge outward, giving a wide effective spread and high moment stiffness for the 300 mm shaft. The preset clearance suits the standard temperature range; unusual thermal gradients between shaft and housing call for a clearance review against the 300 mm size before ordering 4T-323160UTG.
Typical equipment & failure modes
Common applications
- power-plant mill and fan shafts
- rolling-mill roll-neck and pinion-stand positions
- mine hoist and dragline drum shafts
- cement-plant mill and kiln drive trains
Known failure patterns
- edge loading on one row when the housing seats the double cup cocked across its width
- one-row flaking when a bent shaft concentrates the combined load on a single row of the pair
- overheated running after a field attempt to "tighten up" the factory-set internal clearance
- cage fatigue after continuous running near the grease limiting speed without oil cooling
- water-induced pitting when washdown reaches the open unit without external seals
Selection pitfalls — read before you substitute
- At 300 mm bore the 4T-323160UTG unit needs hydraulic or crane-assisted fitting and a verified oil supply; manual methods cannot control seating at the 2690 kN C level.
- The 432 heavy plan gives 4T-323160UTG its 160 mm width and 2690 kN rating at the 300 mm bore; do not downgrade to a 430-family unit of the same bore without re-checking C, C0 and the 325 kN Cu.
- Never interchange a TDO double-row unit with two single-row bearings of similar size: the 160 mm width, load spread and clearance logic of 4T-323160UTG are unit-specific.
- The 100.0 mm section leaves little room for oversized shaft fillets; follow the 2203E chamfer table for 4T-323160UTG or the cones bottom out on the radius.
- Clamping the double cup with a cocked end cover pinches one row: tighten the 500 mm OD clamping uniformly around the circumference.
- The 2690/4050 kN ratings and 325 kN Cu here are NTN Ball and Roller Bearings CAT.No.2203E figures for 4T-323160UTG; 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-323160UTG?
4T-323160UTG is a double-row tapered roller bearing of TDO (back-to-back) construction: 300 mm bore, 500 mm outside diameter and 160 mm overall width. From NTN Ball and Roller Bearings CAT.No.2203E: C 2690 kN, C0 4050 kN, Cu 325 kN, grease limiting speed 540 r/min, oil speed 770 r/min, mass about 130 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 300 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-323160UTG belongs to the heavy-duty 432-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-323160UTG 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 160 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 323160UTG mean?
Suffix reading on 323160UTG: UTG marks the ULTAGE specification for large NTN tapered rollers — upgraded material and internal design, printed with the ＊ symbol ahead of the order number; suffixed variants are separate order numbers and are not interchangeable articles.
Why does 4T-323160UTG list two speeds, 540 and 770 r/min?
The lower figure, 540 r/min, is the grease-lubricated limiting speed for the two rows and their cages. With oil lubrication NTN rates 4T-323160UTG at 770 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.