Manufactured by CHG Bearing, the NN 3052/SPC3W33 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/SPC3W33 - Super-Precision Cylindrical Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NN 3052/SPC3W33 |
| Brand | CHG® |
| Characteristics | |
| Bearing Type | Super-precision Cylindrical Roller Bearing |
| Design Type | Cylindrical Bore |
| 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 |
| 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) | 47.4 kg |
| Radial Internal Clearance | C3 mm |
| Internal Design & Weight | |
| Cage Type | Machined Metal Cage |
| Mounting Dimensions | |
| Lubrication Port Thread / Size Φ1 | 355.3 |
NN 3052/SPC3W33 400 mm 260 mm 104 mm Frequently Asked Questions about NN 3052/SPC3W33 Super-Precision Cylindrical Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
For international ocean and air freight, CHG Bearing packs NN 3052/SPC3W33 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.
The Open Type engineered for NN 3052/SPC3W33 by CHG Bearing utilizes precision non-contact metal shields or reinforced NBR/FKM contact lip seals. This barrier prevents particulate ingress, washdown fluids, and abrasive dust from reaching the raceways while eliminating grease leakage under centrifugal forces.
Standard batches of CHG Bearing NN 3052/SPC3W33 conform strictly to ISO Class Normal (ABEC-1). For high-precision machine tool spindles, gearboxes, or robotics requiring tighter runouts, CHG Bearing can provide custom batches graded to ISO Class 6 (P6/ABEC-3) or ISO Class 5 (P5/ABEC-5) with 100% micrometer verification.
Yes, CHG Bearing works closely with industrial OEMs and brand distributors. We offer turnkey custom engineering for NN 3052/SPC3W33, including laser-etched customer logos, custom internal radial clearances, specialized grease formulations, and bespoke protective packaging.
