Manufactured by CHG Bearing, the NA48291/48220D is a precision Double Row Tapered Roller Bearings. Key dimensional parameters include a 127 mm bore diameter, a 182.563 mm outer diameter, and a 85.725 mm overall width. This component is designed to meet standard load requirements and ensure consistent operational performance. For comprehensive technical evaluation, please explore the detailed specifications, dimensional data, product images, and CAD drawings provided below. A complete PDF data sheet is also readily available for direct download to support your engineering and procurement needs.
NA48291/48220D - Double Row Tapered Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NA48291/48220D |
| Brand | CHG® |
| Bearing | Double Row Tapered Roller Bearing |
| Characteristics | |
| Series | 370000 |
| Number of Rows | Double Row |
| Tolerance Class | Class 4 |
| Dimensions | |
| Bore Diameter (d) | 127 mm |
| Width (B) | 85.725 mm |
| Outer Diameter (D) | 182.563 mm |
| Bore Diameter Tolerance | 0 – +0.025 mm |
| Outside Diameter Tolerance | 0 – +0.025 mm |
| Inner Ring Chamfer | 3.2 mm |
| Outer Ring Chamfer | 1.6 mm |
| Inner Ring Assembly Width Tolerance | -0.508 – +0.711 mm |
| Outer Ring Assembly Width | 120.65 mm |
| Outer Ring Assembly Width Tolerance | -0.508 – +0.711 mm |
| Shaft Abutment Diameter | 171.1 mm |
| Housing Abutment Diameter | 242.6 mm |
| Lubrication Hole Diameter | 5 mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 941 kN |
| Basic Static Load Rating C0 (kN) | 1830 kN |
| Material | |
| Mass (kg) | 25.3 kg |
| Ring Material | Bearing Steel |
| Cage Material | 08Al Steel / Grade 10 Steel |
| Lubrication Groove Width | 10 mm |
| Roller Material | Bearing Steel |
NA48291/48220D 182.563 mm 127 mm Frequently Asked Questions about NA48291/48220D Double Row Tapered Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Engineered according to international ISO boundary plans, CHG Bearing supplies NA48291/48220D with a precision bore diameter (d) of 127 mm, an outside diameter (D) of 182.563 mm, and a nominal ring width (B) of 85.725 mm. This configuration yields an effective cross-sectional wall thickness of 27.8 mm and an envelope ratio (D/d) of 1.44, delivering compact rigidity for OEM machinery housings.
Quality starts with raw material selection: CHG Bearing crafts NA48291/48220D inner and outer rings from high-purity High-Quality Chrome Steel (GCr15/100Cr6). Our raw billets undergo vacuum degassing and secondary ESR (electroslag remelting) processes to drastically eliminate non-metallic sulfide and oxide inclusions, elevating subsurface contact fatigue resistance.
For international ocean and air freight, CHG Bearing packs NA48291/48220D with industrial VCI anti-corrosion barrier wrapping, sealed polybags, individual cartons, and fumigated ocean-worthy wooden crates. This multi-layer barrier guarantees rust-free storage for a minimum shelf life of 24 to 36 months.
Yes, CHG Bearing works closely with industrial OEMs and brand distributors. We offer turnkey custom engineering for NA48291/48220D, including laser-etched customer logos, custom internal radial clearances, specialized grease formulations, and bespoke protective packaging.
