23036EMD1 bearing: complete specifications & equivalents
The 23036EMD1 is a ISO 15 radial bearing sized 180 x 280 x 74 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 180 mm |
| Outer diameter D | 280 mm |
| Width B | 74 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass, machined (M1) |
| Basic dynamic load rating C | 1080 kN |
| Basic static load rating C0 | 1450 kN |
| Fatigue load limit Pu | 78.6 kN |
| Limiting speed (mechanical) | 1600 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 16900 g |
| Manufacturer designation | NTN 23036EMD1 |
| 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 | 7.087 in |
|---|---|
| Outer diameter D | 11.024 in |
| Width B | 2.913 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 50 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) | 15 of 46 |
| Bore above smallest 23000-series size | 110 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 23036EMKD1 | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same NTN 23000-series envelope, cage and ratings; this is the cylindrical-bore execution of the tapered-bore 23036EMKD1 (K/K30 sleeve or tapered-seat mounting). 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 23036EMD1 model number is decoded
23036EMD1 is the EM machined-brass-cage execution of NTN's spherical roller range for a 180 mm shaft — 1080 kN basic dynamic capacity in a 16900 g, open ISO 15 envelope. Digit by digit the code reads as spherical-roller dimension series plus 180 mm bore; the 74 mm width is the wide ISO 15 section, which is why spherical rollers interchange dimensionally but not in cage or rating detail. At 1080 kN C and 16900 g mass the 23000 series part is built for shock and vibration; the 74 mm-wide ring needs square abutments to keep both rows equally loaded. Grease/oil ratio: the 1,600 r/min limiting value is .80 of the 2,000 r/min oil value; heavy 74 mm-wide cages run hot in churning grease, so quantity and groove supply both matter. Fit the cylindrical-bore 23036EMD1 with the inner ring heated (max 120 °C) for the shaft interference; the outer ring slides into the housing with its spherical seat able to pivot after seating.
Typical equipment & failure modes
Common applications
- offshore and marine propulsion shaftlines
- large wind-turbine main-shaft arrangements
- steel-mill and heavy crusher main shafts
- mining shovel and dragline swing shafts
Known failure patterns
- lubricant starvation at the centre rib area when the D1/W33 groove is not connected to a relubrication supply
- cage damage when a mounting force is applied through the roller set instead of the ring face
- roller-end smearing during skidding starts under light load and high viscosity grease
- rolling-contact fatigue after the catalogue L10 life at the actual load
- asymmetric wear on the two roller rows from sustained angular misalignment beyond the self-aligning range
Selection pitfalls — read before you substitute
- At 180 mm bore 23036EMD1 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.
- Oil relubrication toward 2,000 r/min needs drain and level design; flooding the 74 mm cavity churns heat through the heavy roller set and cage despite the higher oil speed figure.
- Never substitute 23036EMD1 by envelope alone: the 1450 kN C0 and 78.6 kN Pu are specific to the NTN EM machined-brass-cage execution, and vibrating duty depends heavily on cage identity.
- The cylindrical-bore 23036EMD1 and its tapered-bore counterpart 23036EMKD1 share envelope and ratings but not mounting: do not order the K variant unless the drawing specifies a sleeve or tapered seat.
- Open spherical rollers swallow dust in mining duty; specify labyrinth or taconite seals externally, or the 1,600 r/min grease rating is lost to abrasive wear long before fatigue.
- The 1080/1450 kN ratings, 78.6 kN Pu and 16900 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for 23036EMD1 (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 23036EMD1?
23036EMD1 is an NTN double-row spherical roller bearing to ISO 15: 180 mm bore, 280 mm OD and 74 mm width (7.087 × 11.024 × 2.913 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 1080 kN, C0 1450 kN, Pu 78.6 kN, grease limiting speed 1,600 r/min, oil 2,000 r/min, mass about 16900 g. It is open, with one-piece machined brass cage (EM high-capacity design).
What is the difference between the K/K30 tapered bore and the cylindrical bore versions?
23036EMD1 has a cylindrical bore and mounts directly on a machined shaft seat. Its tapered-bore counterpart is 23036EMKD1 (K = 1:12, or K30 = 1:30 on the wide series), intended for adapter/withdrawal-sleeve mounting.
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. 23036EMD1 is the EM machined-brass-cage execution, listed with the ＊ ULTAGE new-generation mark.
What do D1 and W33 mean on 23036EMD1?
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. 23036EMD1 carries D1; W33 is the equivalent industry-spelled annular-groove-and-holes feature seen on other executions.
How much misalignment and axial load can 23036EMD1 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 — 1080 kN C / 1450 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.