Manufactured by CHG Bearing, the NN48/630K/W33 is a precision Double Row Cylindrical Roller Bearings. Key dimensional parameters include a 630 mm bore diameter, a 780 mm outer diameter, and a 150 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.
NN48/630K/W33 - Double Row Cylindrical Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NN48/630K/W33 |
| Brand | CHG® |
| Characteristics | |
| Bearing Type | Double Row Cylindrical Roller Bearing |
| Number of Rows | Double Row |
| Tolerance Class | P0 |
| Dimensions | |
| Bore Diameter (d) | 630 mm |
| Width (B) | 150 mm |
| Outer Diameter (D) | 780 mm |
| Bore Diameter Tolerance | 0 – +0.040 mm |
| Outside Diameter Tolerance | -0.075 – 0 mm |
| Width Tolerance | -0.50 – 0 mm |
| Enveloping Circle Diameter Fw | 746 mm |
| Inner Ring Chamfer | 4 min mm |
| Outer Ring Chamfer | 4 min mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 2780 kN |
| Basic Static Load Rating C0 (kN) | 7180 kN |
| Material | |
| Mass (kg) | 153 kg |
| Ring Material | Bearing Steel |
| Rolling Element Material | Bearing Steel |
| Cage Material | Brass |
| Lubrication Groove Width | 15 mm |
| Lubrication Holes (qty × Ø mm) | 3 × Ø8 |
NN48/630K/W33 780 mm 630 mm 150 mm 746 mm Frequently Asked Questions about NN48/630K/W33 Double Row Cylindrical Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Every production batch of CHG Bearing NN48/630K/W33 Double Row Cylindrical Roller Bearings comes with complete traceability. Upon shipment, CHG Bearing can provide EN 10204 3.1 Material Test Reports (MTR), Certificates of Conformity (CoC), spectral chemical composition analysis, and dimensional inspection sheets.
Each NN48/630K/W33 produced in CHG Bearing manufacturing facilities features accurately profiled corner chamfers complying with DIN 5412 / ISO standard corner radii. When designing mating shafts and housing shoulders, machining an undercut or fillet radius strictly within the inner ring clearance limit (630 mm bore side) ensures perfect planar contact without edge binding.
For international ocean and air freight, CHG Bearing packs NN48/630K/W33 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.
Model NN48/630K/W33 is manufactured by CHG Bearing in standard Normal clearance (CN) for ambient temperature transmission, and C3 or C4 clearance for heavy duty applications. C3 clearance compensates for radial shrinkage caused by tight shaft press-fits (bore 630 mm) and steep thermal gradients between inner and outer rings.
