24164EMD1 bearing: complete specifications & equivalents
The 24164EMD1 is a ISO 15 radial bearing sized 320 x 540 x 218 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 320 mm |
| Outer diameter D | 540 mm |
| Width B | 218 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass, machined (M1) |
| Basic dynamic load rating C | 5010 kN |
| Basic static load rating C0 | 7720 kN |
| Fatigue load limit Pu | 225 kN |
| Limiting speed (mechanical) | 690 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 204000 g |
| Manufacturer designation | NTN 24164EMD1 |
| 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 & 24100-series range
| Bore d | 12.598 in |
|---|---|
| Outer diameter D | 21.26 in |
| Width B | 8.583 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 110 mm |
| Smallest bore in 24100-series | 100 mm |
| Largest outer diameter in 24100-series | 1150 mm |
| Width range across 24100-series | 65–438 mm |
| Bore position in 24100-series (smallest first) | 17 of 32 |
| Bore above smallest 24100-series size | 220 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 24164EMK30D1 | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same NTN 24100-series envelope, cage and ratings; this is the cylindrical-bore execution of the tapered-bore 24164EMK30D1 (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 24164EMD1 model number is decoded
For heavy radial load with misalignment on a 320 mm shaft, NTN supplies 24164EMD1: sphered outer raceway, two roller rows, one-piece machined brass cage (EM high-capacity design), oil speed 880 r/min. The leading digits are the ISO 15 dimension series (24100 series); the bore code resolves to 320 mm (two-digit code ×5, with the 00–03 exception table), and 540 mm OD / 218 mm width follow the general plan. At 5010 kN C and 204000 g mass the 24100 series part is built for shock and vibration; the 218 mm-wide ring needs square abutments to keep both rows equally loaded. Grease/oil ratio: the 690 r/min limiting value is .78 of the 880 r/min oil value; heavy 218 mm-wide cages run hot in churning grease, so quantity and groove supply both matter. Fit the cylindrical-bore 24164EMD1 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
- 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
- lubricant starvation at the centre rib area when the D1/W33 groove is not connected to a relubrication supply
- pressed EA cage fatigue under sustained vibration when minimum load is not maintained
- micro-pitting when the EHL film is thinner than the raceway composite roughness
- hard-particle indentation through the open arrangement in dusty mining duty
- hard-particle indentation through the open arrangement in dusty mining duty
Selection pitfalls — read before you substitute
- At 320 mm bore 24164EMD1 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 320 mm shaft; a sleeve sized to bore alone ignores thread, width and the oil-injection option on large K30 seats.
- The cylindrical-bore 24164EMD1 and its tapered-bore counterpart 24164EMK30D1 share envelope and ratings but not mounting: do not order the K variant unless the drawing specifies a sleeve or tapered seat.
- Oil relubrication toward 880 r/min needs drain and level design; flooding the 218 mm cavity churns heat through the heavy roller set and cage despite the higher oil speed figure.
- Open spherical rollers swallow dust in mining duty; specify labyrinth or taconite seals externally, or the 690 r/min grease rating is lost to abrasive wear long before fatigue.
- The 5010/7720 kN ratings, 225 kN Pu and 204000 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for 24164EMD1 (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 24164EMD1?
24164EMD1 is an NTN double-row spherical roller bearing to ISO 15: 320 mm bore, 540 mm OD and 218 mm width (12.598 × 21.26 × 8.583 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 5010 kN, C0 7720 kN, Pu 225 kN, grease limiting speed 690 r/min, oil 880 r/min, mass about 204000 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?
24164EMD1 has a cylindrical bore and mounts directly on a machined shaft seat. Its tapered-bore counterpart is 24164EMK30D1 (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. 24164EMD1 is the EM machined-brass-cage execution, listed with the ＊ ULTAGE new-generation mark.
What do D1 and W33 mean on 24164EMD1?
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. 24164EMD1 carries D1; W33 is the equivalent industry-spelled annular-groove-and-holes feature seen on other executions.
How much misalignment and axial load can 24164EMD1 take?
The sphered outer raceway compensates static and dynamic misalignment in the order of 1–2° (verify the exact 2203E figure for the 24100 series); beyond that, load concentrates on one roller row. Load is predominantly radial with a moderate axial share in either direction — 5010 kN C / 7720 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.