Manufactured by CHG Bearing, the NA329116/329173D is a precision Double Row Tapered Roller Bearings. Key dimensional parameters include a 300.787 mm bore diameter, a 438.048 mm outer diameter, and a 161.925 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.
NA329116/329173D - Double Row Tapered Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NA329116/329173D |
| Brand | CHG® |
| Bearing | Double Row Tapered Roller Bearing |
| Characteristics | |
| Series | 370000 |
| Number of Rows | Double Row |
| Tolerance Class | Class 4 |
| Dimensions | |
| Bore Diameter (d) | 300.787 mm |
| Width (B) | 161.925 mm |
| Outer Diameter (D) | 438.048 mm |
| Bore Diameter Tolerance | 0 – +0.051 mm |
| Outside Diameter Tolerance | 0 – +0.076 mm |
| Inner Ring Chamfer | 6.4 mm |
| Outer Ring Chamfer | 3.2 mm |
| Inner Ring Assembly Width Tolerance | -0.508 – +0.711 mm |
| Outer Ring Assembly Width | 223.838 mm |
| Outer Ring Assembly Width Tolerance | -0.508 – +0.711 mm |
| Shaft Abutment Diameter | 490.5 mm |
| Housing Abutment Diameter | 610 mm |
| Lubrication Hole Diameter | 9 mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 3930 kN |
| Basic Static Load Rating C0 (kN) | 10500 kN |
| Material | |
| Mass (kg) | 234 kg |
| Ring Material | Case-Hardened Steel / Bearing Steel |
| Cage Material | 08Al Steel / Grade 10 Steel |
| Lubrication Groove Width | 20 mm |
| Roller Material | Bearing Steel |
NA329116/329173D 438.048 mm 300.787 mm Frequently Asked Questions about NA329116/329173D Double Row Tapered Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
The CHG Bearing NA329116/329173D is rated for limiting speeds up to standard rated RPM under forced oil-mist or circulating oil lubrication regimes. When lubricated with factory-filled synthetic high-speed grease, safe continuous velocity is maintained at approximately 75% to 85% of the maximum nominal limit, preventing thermal runaway.
As standard production, CHG Bearing subjects NA329116/329173D to precision bainite or martensite quenching, offering dimensional stability up to 120°C (248°F). For high-heat processing equipment, CHG Bearing also supplies custom S0 (150°C), S1 (200°C), or S2 (250°C) stabilization heat treatments upon request to prevent residual austenite transformation.
Engineered according to international ISO boundary plans, CHG Bearing supplies NA329116/329173D with a precision bore diameter (d) of 300.787 mm, an outside diameter (D) of 438.048 mm, and a nominal ring width (B) of 161.925 mm. This configuration yields an effective cross-sectional wall thickness of 68.6 mm and an envelope ratio (D/d) of 1.46, delivering compact rigidity for OEM machinery housings.
To match diverse operational dynamics, CHG Bearing supplies NA329116/329173D with multiple cage configurations: high-strength pressed steel ribbon cages for standard duty, solid machined brass cages (M/CA) for heavy vibration and shock loads, or lightweight glass-fiber reinforced polyamide cages (TN9/TVP) for high acceleration and ultra-low noise.
