22211EMD1 bearing: complete specifications & equivalents
The 22211EMD1 is a ISO 15 radial bearing sized 55 x 100 x 25 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 55 mm |
| Outer diameter D | 100 mm |
| Width B | 25 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass, machined (M1) |
| Basic dynamic load rating C | 148 kN |
| Basic static load rating C0 | 140 kN |
| Fatigue load limit Pu | 11.9 kN |
| Limiting speed (mechanical) | 5300 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 827 g |
| Manufacturer designation | NTN 22211EMD1 |
| 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 | 2.165 in |
|---|---|
| Outer diameter D | 3.937 in |
| Width B | 0.984 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 22.5 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) | 7 of 32 |
| Bore above smallest 22200-series size | 30 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 22211EMKD1 | 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 22211EMKD1 (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 22211EMD1 model number is decoded
NTN lists 22211EMD1 with a cylindrical bore and D1 outer-ring annular oil groove with holes: 55 mm bore, 100 mm OD, 25 mm width, rated 5,300 r/min on grease. On the NTN nameplate the suffix cluster after the size reads in order: cage design (EM), bore (cylindrical), lubrication feature (D1); 22211EMD1 is assembled exactly in that order. Open by design, 22211EMD1 requires application seals and a grease or oil system; NTN vibrating-duty executions of this envelope are selected with cage and clearance choices that are separate order codes. Equivalent-load planning keeps a radial plus moderate axial combination on 22211EMD1; if the axial component dominates, pair with a thrust bearing rather than running one roller row unloaded. Supply grease through the D1 feature during commissioning and at the calculated interval, rotating the 55 mm bore assembly by hand to distribute it across both rows.
Typical equipment & failure modes
Common applications
- vibrating screen and feeder shafts
- industrial gearbox and reducer shafts
- conveyor pulley and elevator drum shafts
- stone crusher and screen eccentric shafts
Known failure patterns
- raceway spalling at the roller ends when misalignment or deflection concentrates the line contact
- cage damage when a mounting force is applied through the roller set instead of the ring face
- sliding wear and heat when relubrication intervals ignore the groove (D1/W33) supply path
- false brinelling on stopped machines exposed to screen or crusher vibration
- hard-particle indentation through the open arrangement in dusty mining duty
Selection pitfalls — read before you substitute
- Vibrating-duty 55 mm bearings need the right clearance class and secure fits; verify the k5/m5 seat and relubrication routing rather than assuming the open 22211EMD1 is greased for life.
- Open spherical rollers swallow dust in mining duty; specify labyrinth or taconite seals externally, or the 5,300 r/min grease rating is lost to abrasive wear long before fatigue.
- Self-aligning does not mean unlimited misalignment: beyond the catalogue angle the outer ring's spherical travel is exhausted and the 148 kN rating no longer applies.
- Adapter-sleeve mounting requires the correct sleeve series and locknut for the 55 mm shaft; a sleeve sized to bore alone ignores thread, width and the oil-injection option on large K seats.
- Self-aligning does not mean unlimited misalignment: beyond the catalogue angle the outer ring's spherical travel is exhausted and the 148 kN rating no longer applies.
- The 148/140 kN ratings, 11.9 kN Pu and 827 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for 22211EMD1 (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 22211EMD1?
22211EMD1 is an NTN double-row spherical roller bearing to ISO 15: 55 mm bore, 100 mm OD and 25 mm width (2.165 × 3.937 × 0.984 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 148 kN, C0 140 kN, Pu 11.9 kN, grease limiting speed 5,300 r/min, oil 6,700 r/min, mass about 827 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?
22211EMD1 has a cylindrical bore and mounts directly on a machined shaft seat. Its tapered-bore counterpart is 22211EMKD1 (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. 22211EMD1 is the EM machined-brass-cage execution, listed with the ＊ ULTAGE new-generation mark.
What do D1 and W33 mean on 22211EMD1?
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. 22211EMD1 carries D1; W33 is the equivalent industry-spelled annular-groove-and-holes feature seen on other executions.
How much misalignment and axial load can 22211EMD1 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 — 148 kN C / 140 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.