22208EMD1 bearing: complete specifications & equivalents
The 22208EMD1 is a ISO 15 radial bearing sized 40 x 80 x 23 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 40 mm |
| Outer diameter D | 80 mm |
| Width B | 23 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass, machined (M1) |
| Basic dynamic load rating C | 110 kN |
| Basic static load rating C0 | 98 kN |
| Fatigue load limit Pu | 7.29 kN |
| Limiting speed (mechanical) | 6800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 529 g |
| Manufacturer designation | NTN 22208EMD1 |
| 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 & 22200-series range
| Bore d | 1.575 in |
|---|---|
| Outer diameter D | 3.15 in |
| Width B | 0.906 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 20 mm |
| Smallest bore in 22200-series | 25 mm |
| Largest outer diameter in 22200-series | 580 mm |
| Width range across 22200-series | 18–150 mm |
| Bore position in 22200-series (smallest first) | 4 of 32 |
| Bore above smallest 22200-series size | 15 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 22208EMKD1 | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same NTN 22200-series envelope, cage and ratings; this is the cylindrical-bore execution of the tapered-bore 22208EMKD1 (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 22208EMD1 model number is decoded
The NTN order number 22208EMD1 identifies a 40×80×23 mm (1.575 × 3.15 × 0.906 in) spherical roller bearing, cylindrical bore, to the ISO 15 boundary plan. Numbering ties 22208EMD1 to its envelope and execution: same-number EA versus EM or plain variants share the 40 mm bore but differ in cage and sometimes mass, so they are quoted as separate articles. Pu 7.29 kN is the catalogue fatigue load limit for 22208EMD1, used in the adjusted-life equation at contaminated or partial-film conditions typical of mining and vibrating duty. With about 2.8 kN of C per millimetre of the 40 mm bore, 22208EMD1 screens interchange candidates quickly — then verify cage (EA/EM), bore (K/K30) and lubrication feature (D1/W33) suffixes. After mounting on a tapered seat, lock the nut and re-check clearance after a short running-in period, because sleeve seating and ring lift-off can change the residual clearance of the 40 mm set.
Typical equipment & failure modes
Common applications
- marine propulsion auxiliary shafts
- vibrating screen and feeder shafts
- industrial gearbox and reducer shafts
- conveyor pulley and elevator drum shafts
Known failure patterns
- raceway spalling at the roller ends when misalignment or deflection concentrates the line contact
- machined EM cage wear from inadequate oil film at the cage-guiding surfaces
- roller-end smearing during skidding starts under light load and high viscosity grease
- false brinelling on stopped machines exposed to screen or crusher vibration
- rolling-contact fatigue after the catalogue L10 life at the actual load
Selection pitfalls — read before you substitute
- Vibrating-duty 40 mm bearings need the right clearance class and secure fits; verify the k5/m5 seat and relubrication routing rather than assuming the open 22208EMD1 is greased for life.
- Do not confuse EA and EM at the same number: 22208EMD1 carries EM machined-brass-cage; swapping to the other cage execution changes mass, speed behaviour and sometimes suitability for vibration, even though the 40×80 mm envelope is identical.
- Never substitute 22208EMD1 by envelope alone: the 98 kN C0 and 7.29 kN Pu are specific to the NTN EM machined-brass-cage execution, and vibrating duty depends heavily on cage identity.
- Never substitute 22208EMD1 by envelope alone: the 98 kN C0 and 7.29 kN Pu are specific to the NTN EM machined-brass-cage execution, and vibrating duty depends heavily on cage identity.
- The D1/W33 groove only helps if the housing has a matching grease passage; mounting a D1 22208EMD1 in a solid block with no port wastes the feature and leaves the centre rows under-lubricated.
- The 110/98 kN ratings, 7.29 kN Pu and 529 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for 22208EMD1 (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 22208EMD1?
22208EMD1 is an NTN double-row spherical roller bearing to ISO 15: 40 mm bore, 80 mm OD and 23 mm width (1.575 × 3.15 × 0.906 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 110 kN, C0 98 kN, Pu 7.29 kN, grease limiting speed 6,800 r/min, oil 8,500 r/min, mass about 529 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?
22208EMD1 has a cylindrical bore and mounts directly on a machined shaft seat. Its tapered-bore counterpart is 22208EMKD1 (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. 22208EMD1 is the EM machined-brass-cage execution, listed with the ＊ ULTAGE new-generation mark.
What do D1 and W33 mean on 22208EMD1?
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. 22208EMD1 carries D1; W33 is the equivalent industry-spelled annular-groove-and-holes feature seen on other executions.
How much misalignment and axial load can 22208EMD1 take?
The sphered outer raceway compensates static and dynamic misalignment in the order of 1–2° (verify the exact 2203E figure for the 22200 series); beyond that, load concentrates on one roller row. Load is predominantly radial with a moderate axial share in either direction — 110 kN C / 98 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.