22212EAD1 bearing: complete specifications & equivalents
The 22212EAD1 is a ISO 15 radial bearing sized 60 x 110 x 28 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | NTN |
| Bore diameter d | 60 mm |
| Outer diameter D | 110 mm |
| Width B | 28 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 187 kN |
| Basic static load rating C0 | 181 kN |
| Fatigue load limit Pu | 15.4 kN |
| Limiting speed (mechanical) | 4800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1140 g |
| Manufacturer designation | NTN 22212EAD1 |
| 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 | 2.362 in |
|---|---|
| Outer diameter D | 4.331 in |
| Width B | 1.102 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 25 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) | 8 of 32 |
| Bore above smallest 22200-series size | 35 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 22212EAKD1 | 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 22212EAKD1 (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 22212EAD1 model number is decoded
The NTN order number 22212EAD1 identifies a 60×110×28 mm (2.362 × 4.331 × 1.102 in) spherical roller bearing, cylindrical bore, to the ISO 15 boundary plan. Numbering ties 22212EAD1 to its envelope and execution: same-number EA versus EM or plain variants share the 60 mm bore but differ in cage and sometimes mass, so they are quoted as separate articles. The bearing accepts predominantly radial load with a moderate axial share, but is not a pure thrust bearing: sustained axial-only load skids the unloaded row and damages the EA pressed-steel-cage cage. The 25.0 mm section height hosts the spherical roller geometry; shaft and housing fillet radii must clear the chamfer table so the 28 mm-wide ring seats fully on both sides. On vibrating-duty shafts verify the radial clearance class and cage choice at order time; the open 22212EAD1 leaves sealing and the C3/C4 clearance decision to the application drawing.
Typical equipment & failure modes
Common applications
- paper-machine dryer and press rolls
- cement-mill and kiln auxiliary drives
- large gearbox and marine gear shafts
- wind-turbine gearbox and rotor bearings
Known failure patterns
- lubricant starvation at the centre rib area when the D1/W33 groove is not connected to a relubrication supply
- machined EM cage wear from inadequate oil film at the cage-guiding surfaces
- sliding wear and heat when relubrication intervals ignore the groove (D1/W33) supply path
- asymmetric wear on the two roller rows from sustained angular misalignment beyond the self-aligning range
- water-induced pitting in washdown or outdoor duty without effective external seals
Selection pitfalls — read before you substitute
- Mount the 60 mm ring with induction heat or the sleeve drive-up procedure; at 1140 g cocking damages the spherical raceways, and repositioning after seating is impractical.
- Oil relubrication toward 6,000 r/min needs drain and level design; flooding the 28 mm cavity churns heat through the heavy roller set and cage despite the higher oil speed figure.
- Oil relubrication toward 6,000 r/min needs drain and level design; flooding the 28 mm cavity churns heat through the heavy roller set and cage despite the higher oil speed figure.
- Oil relubrication toward 6,000 r/min needs drain and level design; flooding the 28 mm cavity churns heat through the heavy roller set and cage despite the higher oil speed figure.
- Never substitute 22212EAD1 by envelope alone: the 181 kN C0 and 15.4 kN Pu are specific to the NTN EA pressed-steel-cage execution, and vibrating duty depends heavily on cage identity.
- The 187/181 kN ratings, 15.4 kN Pu and 1140 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for 22212EAD1 (EA pressed-steel-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 22212EAD1?
22212EAD1 is an NTN double-row spherical roller bearing to ISO 15: 60 mm bore, 110 mm OD and 28 mm width (2.362 × 4.331 × 1.102 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 187 kN, C0 181 kN, Pu 15.4 kN, grease limiting speed 4,800 r/min, oil 6,000 r/min, mass about 1140 g. It is open, with pressed sheet-steel window cage (EA high-capacity design).
What is the difference between the K/K30 tapered bore and the cylindrical bore versions?
22212EAD1 has a cylindrical bore and mounts directly on a machined shaft seat. Its tapered-bore counterpart is 22212EAKD1 (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. 22212EAD1 is the EA pressed-steel-cage execution, listed with the ＊ ULTAGE new-generation mark.
What do D1 and W33 mean on 22212EAD1?
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. 22212EAD1 carries D1; W33 is the equivalent industry-spelled annular-groove-and-holes feature seen on other executions.
How much misalignment and axial load can 22212EAD1 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 — 187 kN C / 181 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.