Manufactured by CHG Bearing, the NU640 is a precision Single Row Cylindrical Roller Bearings. Key dimensional parameters include a 200 mm bore diameter, a 320 mm outer diameter, and a 88.9 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.
NU640 - Single Row Cylindrical Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NU640 |
| Brand | CHG® |
| Characteristics | |
| Bearing Type | Single Row Cylindrical Roller Bearing |
| Number of Rows | Single Row |
| Tolerance Class | P0 |
| Dimensions | |
| Bore Diameter (d) | 200 mm |
| Width (B) | 88.9 mm |
| Outer Diameter (D) | 320 mm |
| Bore Diameter Tolerance | -0.030 – 0 mm |
| Outside Diameter Tolerance | -0.040 – 0 mm |
| Width Tolerance | -0.30 – 0 mm |
| Enveloping Circle Diameter Fw | 230 mm |
| Inner Ring Chamfer | 2.5 min mm |
| Outer Ring Chamfer | 2.5 min mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 830 kN |
| Basic Static Load Rating C0 (kN) | 1400 kN |
| Material | |
| Mass (kg) | 28.6 kg |
| Ring Material | Bearing Steel |
| Rolling Element Material | Bearing Steel |
| Cage Material | Brass |
NU640 320 mm 200 mm 88.9 mm 230 mm Frequently Asked Questions about NU640 Single Row Cylindrical Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Sourcing NU640 directly from CHG Bearing eliminates intermediate brokerage markups while granting you factory-direct engineering backup, rigorous ISO-certified quality assurance, competitive volume wholesale pricing, and dependable supply chain stability for Single Row Cylindrical Roller Bearings.
Quality starts with raw material selection: CHG Bearing crafts NU640 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.
Engineered according to international ISO boundary plans, CHG Bearing supplies NU640 with a precision bore diameter (d) of 200 mm, an outside diameter (D) of 320 mm, and a nominal ring width (B) of 88.9 mm. This configuration yields an effective cross-sectional wall thickness of 60.0 mm and an envelope ratio (D/d) of 1.6, delivering compact rigidity for OEM machinery housings.
Absolutely. The CHG Bearing NU640 Single Row Cylindrical Roller Bearings is a 1:1 direct interchange for renowned brands, matching part numbers: SKF NU640, FAG NU640, NSK NU640. It shares identical envelope boundary dimensions, load capacities, and shaft fits, allowing instant drop-in replacement without retrofitting your machinery.
