Manufactured by CHG Bearing, the NN 3052 K/SPW33 is a precision Super-Precision Cylindrical Roller Bearings. Key dimensional parameters include a 260 mm bore diameter, a 400 mm outer diameter, and a 104 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.
NN 3052 K/SPW33 - Super-Precision Cylindrical Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NN 3052 K/SPW33 |
| Brand | CHG® |
| Characteristics | |
| Bearing Type | Super-precision Cylindrical Roller Bearing |
| Design Type | Tapered Bore 1:12 |
| Structure (Drawing Reference) | Complete Bearing |
| Number of Rows | 2 |
| Ring Type | None |
| Design | NN Design |
| Tolerance Class | SP |
| Bearing Material | Bearing Steel |
| Coating | None |
| Sealing | None |
| Lubricant | None |
| Features | Annular Lubrication Groove and Lubrication Holes |
| Number of Flanges – Outer Ring | 0 |
| Number of Ribs – Inner Ring | 3 |
| Dimensions | |
| Bore Diameter (d) | 260 mm |
| Width (B) | 104 mm |
| Outer Diameter (D) | 400 mm |
| Minimum Chamfer Dimension rmin | 3 mm |
| Inner Ring Chamfer | 4 mm |
| Outer Ring Chamfer | 1.5 mm |
| End-face Height Difference h | 5 mm |
| Inner-Ring Land Diameter (L1 / d1) | 312.8 mm |
| Outer Ring Raceway Diameter E | 364 mm |
| Shaft Shoulder Diameter dₐ, min. | 276 mm |
| Housing Shoulder Diameter Dₐ, min. | 367 mm |
| Housing Shoulder Diameter Dₐ, max. | 384 mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 1020 kN |
| Basic Static Load Rating C₀ (kN) | 1930 kN |
| Limiting Speed – Grease (r/min) | 2000 r/min |
| Limiting Speed – Oil-air (r/min) | 2400 r/min |
| Reference Grease Quantity Gref (cm³) | 392 cm³ |
| Fatigue Load Limit Pᵤ (kN) | 183 kN |
| Axial Static Stiffness – Guideline Value (N/µm) | 5570 N/µm |
| Material | |
| Lubrication Groove Width | 15.3 mm |
| Lubrication Holes (qty × Ø mm) | 7.5 |
| Weight (kg) | 46 kg |
| Radial Internal Clearance | C1 mm |
| Internal Design & Weight | |
| Cage Type | Machined Metal Cage |
| Mounting Dimensions | |
| Lubrication Port Thread / Size Φ1 | 355.3 |
NN 3052 K/SPW33 400 mm 260 mm 104 mm Frequently Asked Questions about NN 3052 K/SPW33 Super-Precision Cylindrical Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Beyond standard alloy steel, CHG Bearing can customize the NN 3052 K/SPW33 Super-Precision Cylindrical Roller Bearings using AISI 440C stainless steel, black oxide coating, zinc-nickel plating, or hybrid ceramic (Si3N4) balls for applications involving chemical exposure, marine salt fog, or galvanic current hazards.
In its sealed configuration (Open Type), CHG Bearing pre-charges NN 3052 K/SPW33 with premium wide-temperature lithium-complex or polyurea grease, calibrated to a 30%–35% cavity volume ratio. For open-type variants, synthetic PAO or refined mineral lubricating oils with appropriate EP (Extreme Pressure) additives should be circulated.
Each NN 3052 K/SPW33 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 (260 mm bore side) ensures perfect planar contact without edge binding.
Sourcing NN 3052 K/SPW33 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 Super-Precision Cylindrical Roller Bearings.
