23076EMKD1 bearing: complete specifications & equivalents
The 23076EMKD1 is a ISO 15 radial bearing sized 380 x 560 x 135 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 380 mm |
| Outer diameter D | 560 mm |
| Width B | 135 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass, machined (M1) |
| Basic dynamic load rating C | 3230 kN |
| Basic static load rating C0 | 5270 kN |
| Fatigue load limit Pu | 247 kN |
| Limiting speed (mechanical) | 720 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 113000 g |
| Manufacturer designation | NTN 23076EMKD1 |
| Standard | ISO 15 |
| Catalog version | NTN Ball and Roller Bearings CAT.No.2203E |
| Last verified | 2026-10-01 |
Source: catalog reference (NTN Ball and Roller Bearings CAT.No.2203E) · extracted 2026-10-01
Parameters extracted from the official NTN Ball and Roller Bearings catalogue (NTN Ball and Roller Bearings CAT.No.2203E); 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 & 23000-series range
| Bore d | 14.961 in |
|---|---|
| Outer diameter D | 22.047 in |
| Width B | 5.315 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 90 mm |
| Smallest bore in 23000-series | 70 mm |
| Largest outer diameter in 23000-series | 1580 mm |
| Width range across 23000-series | 27–345 mm |
| Bore position in 23000-series (smallest first) | 26 of 46 |
| Bore above smallest 23000-series size | 310 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 23076EMD1 | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same NTN 23000-series envelope, cage and ratings; this is the tapered-bore execution (K, 1:12) of the cylindrical-bore 23076EMD1 — mounting (adapter/withdrawal sleeve or tapered seat, drive-up) differs. Verify shaft arrangement. |
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 23076EMKD1 model number is decoded
In NTN Ball and Roller Bearings CAT.No.2203E, 23076EMKD1 denotes the 380 mm bore spherical roller bearing (3230 kN C / 5270 kN C0) in the 23000 series, the self-aligning choice for heavy combined load. Numbering ties 23076EMKD1 to its envelope and execution: same-number EA versus EM or plain variants share the 380 mm bore but differ in cage and sometimes mass, so they are quoted as separate articles. The 90.0 mm radial section over the 380 mm bore carries two roller rows; capacity per millimetre of bore is about 8.5 kN/mm, among the highest of rolling bearings for the ISO 15 envelope. The 90.0 mm section height hosts the spherical roller geometry; shaft and housing fillet radii must clear the chamfer table so the 135 mm-wide ring seats fully on both sides. Fillet radii on shaft and housing must clear the ring chamfers of the 135 mm-wide set; use the NTN shoulder/withdrawal-groove table rather than copying a ball-bearing layout.
Typical equipment & failure modes
Common applications
- cement-rotary-kiln support and trunnion rolls
- large SAG/ball-mill trunnion and pinion shafts
- heavy vibrating screens and grizzly feeders
- offshore and marine propulsion shaftlines
Known failure patterns
- raceway spalling at the roller ends when misalignment or deflection concentrates the line contact
- pressed EA cage fatigue under sustained vibration when minimum load is not maintained
- sliding wear and heat when relubrication intervals ignore the groove (D1/W33) supply path
- hard-particle indentation through the open arrangement in dusty mining duty
- asymmetric wear on the two roller rows from sustained angular misalignment beyond the self-aligning range
Selection pitfalls — read before you substitute
- At 380 mm bore 23076EMKD1 is normally mounted on adapter/withdrawal sleeves with hydraulic assistance; follow the NTN drive-up angle or oil-injection procedure — manual nut tightening cannot set the multi-tonne seating correctly.
- Adapter-sleeve mounting requires the correct sleeve series and locknut for the 380 mm shaft; a sleeve sized to bore alone ignores thread, width and the oil-injection option on large K30 seats.
- Adapter-sleeve mounting requires the correct sleeve series and locknut for the 380 mm shaft; a sleeve sized to bore alone ignores thread, width and the oil-injection option on large K30 seats.
- K and K30 are different tapers — K is 1:12 and K30 is 1:30 on the wide series; an adapter sleeve for one will not mount the other 380 mm bearing, and drive-up procedures differ.
- The 1:12 tapered bore is the only difference from the cylindrical-bore 23076EMD1: envelopes and ratings match, but drive-up tooling, sleeve and seat do not — never mix the two mounting methods.
- The 3230/5270 kN ratings, 247 kN Pu and 113000 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for 23076EMKD1 (EM machined-brass-cage/D1); another maker's same-envelope part revises internal geometry, so re-verify ratings and cage before substitution on vibrating or rated drives.
Frequently asked questions
What are the dimensions and catalogue data of 23076EMKD1?
23076EMKD1 is an NTN double-row spherical roller bearing to ISO 15: 380 mm bore, 560 mm OD and 135 mm width (14.961 × 22.047 × 5.315 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 3230 kN, C0 5270 kN, Pu 247 kN, grease limiting speed 720 r/min, oil 910 r/min, mass about 113000 g. It is open, with one-piece machined brass cage (EM high-capacity design) and a 1:12 tapered bore.
What is the difference between the K/K30 tapered bore and the cylindrical bore versions?
K denotes a 1:12 tapered bore. 23076EMKD1 mounts on an adapter sleeve (or tapered shaft seat) and is driven up to the specified residual clearance; its cylindrical-bore counterpart in the same envelope and ratings is 23076EMD1.
What do EA and EM mean on NTN spherical roller bearings?
EA is the NTN standard-capacity/high-capacity execution with a pressed sheet-steel window cage; EM is the high-capacity execution with a one-piece machined brass cage. Both use the optimised symmetric-roller design, but cage identity changes mass, speed behaviour and suitability for duties like vibrating screens, so they are separate order numbers. 23076EMKD1 is the EM machined-brass-cage execution, listed with the ＊ ULTAGE new-generation mark.
What do D1 and W33 mean on 23076EMKD1?
D1 is NTN's outer-ring lubrication feature: an annular groove with oil holes around the outer ring, aligned with a housing grease port so lubricant reaches both roller rows directly. 23076EMKD1 carries D1; W33 is the equivalent industry-spelled annular-groove-and-holes feature seen on other executions.
How much misalignment and axial load can 23076EMKD1 take?
The sphered outer raceway compensates static and dynamic misalignment in the order of 1–2° (verify the exact 2203E figure for the 23000 series); beyond that, load concentrates on one roller row. Load is predominantly radial with a moderate axial share in either direction — 3230 kN C / 5270 kN C0 — but sustained pure axial load is not recommended because it unloads one row.
Reviewed & verified by the MPN Base engineering desk against source catalog NTN Ball and Roller Bearings CAT.No.2203E on 2026-10-01. Read our editorial & correction policy.