NTN22224BKD1Double-Row Spherical Roller Bearing 120x215x58 mm, Tapered 1:12 Bore, Outer-Ring Lubrication Groove and Three Holes

Product Description

Product identification

NTN 22224BKD1 double-row spherical roller bearing, self-aligning, tapered bore.

Brand: NTN

Part Number: 22224BKD1

Carton Marking: 22224 B K D1/W33

Base Number: 22224

Series: 222 (ISO 22224)

Bearing Type: Spherical roller bearing, double row, self-aligning, tapered bore

Design Units: Metric

Principal dimensions

Bore (d): 120 mm, tapered 1:12

Outside Diameter (D): 215 mm

Width (B): 58 mm

Bore Type: Tapered, 1:12

Ring Chamfer (rs min): 2.1 mm

Construction and materials

Number Of Rows: 2

Rolling Elements: Barrel (spherical) rollers

Seal Type: Open

Closure Type: Open

Bearing Material: Through-hardened bearing steel

Precision Class: Normal (ISO P0, ABEC 1)

Internal Clearance: Normal (CN) as manufactured

Lubricant: Oil or grease

Relubrication Feature: Outer-ring annular lubrication groove with three radial feed holes (D1 / W33)

Load-calculation factors

For the ISO 22224 envelope in NTN’s spherical roller tables: e 0.25, Y1 2.74, Y2 4.08, Y0 2.68.

Mounting data

Shaft Abutment Diameter (da min): 132 mm

Shaft Abutment Diameter (da max): 141 mm

Housing Abutment Diameter (Da max): 203 mm

Housing Bore Clearance Diameter (D1 max): 193 mm

Maximum Fillet Radius (ras max): 2.1 mm

Locking Method: the bearing seats on a shaft machined with a matching 1:12 taper at 120 mm, or on a straight shaft through an adapter sleeve whose tapered outside diameter measures 120 mm to match the bore seat — the H3124 sleeve, which takes a 110 mm straight shaft, with its HM or KM lock nut and MB lock washer. A withdrawal-sleeve arrangement using the AH-series sleeve is the alternative.

Lubrication feature

The D1 execution puts an annular lubrication groove and three radial holes in the outer ring. The groove and its three radial holes take lubricant from the housing lubrication port and distribute it circumferentially around the outer ring and inward to both roller rows. Other makers designate this feature W33, which the carton marking repeats.

Self-aligning behaviour

Two rows of barrel rollers share one spherical raceway in the outer ring, so the inner ring and roller set swivel inside the outer ring. The bearing accommodates static misalignment from housing bore variation and dynamic misalignment from shaft deflection under load, while carrying very high radial load with axial load in both directions.

Application types

Vibrating screens, crushers and mills, conveyor head and tail shafts, gearboxes, fan and blower shafts, paper machine rolls, mixers and agitators.

Set composition

Unit Quantity: 1 Pc. The bearing is a complete, non-separable assembly: outer ring, both roller rows, cage and inner ring. Tapered-bore mounting hardware is a separate purchase — the H3124 adapter sleeve family with HM or KM lock nut and MB lock washer, or an AH-series withdrawal sleeve.

Related designations

Cross-Reference 1: SKF 22224 EK

Cross-Reference 2: FAG 22224-E1-K

Cross-Reference 3: NSK 22224K

Cross-Reference 6: Timken 22224K

Cross-Reference 7: Rollway / Regal Rexnord 22224 MB K W33

Cross-Reference 10: NTN 22224EAKD1 / 22224EMKD1 – current E-design

MPN Variants: 22224BKD1; 22224 BKD1; 22224-BKD1; 22224 B K D1; 22224BKD1W33; 22224 B K D1/W33; 22224-B-K-D1-W33; 22224BK; 22224 BK; 22224K; 22224 K W33; 22224

NTN short form: 22224BK. The 232-series 23224 is a wider section in the same bore and occupies a different housing envelope.

Origin and classification

Country of Origin: Japan

Harmonization Code: 8482.30.00