Manufactured by CHG Bearing, the NN 3034 K/SPW33 is a precision Super-Precision Cylindrical Roller Bearings. Key dimensional parameters include a 170 mm bore diameter, a 260 mm outer diameter, and a 67 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 3034 K/SPW33 - Super-Precision Cylindrical Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NN 3034 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) | 170 mm |
| Width (B) | 67 mm |
| Outer Diameter (D) | 260 mm |
| Minimum Chamfer Dimension rmin | 2 mm |
| Inner Ring Chamfer | 2.1 mm |
| Outer Ring Chamfer | 1.1 mm |
| End-face Height Difference h | 2.5 mm |
| Inner-Ring Land Diameter (L1 / d1) | 204 mm |
| Outer Ring Raceway Diameter E | 236 mm |
| Shaft Shoulder Diameter dₐ, min. | 181 mm |
| Housing Shoulder Diameter Dₐ, min. | 238 mm |
| Housing Shoulder Diameter Dₐ, max. | 249 mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 457 kN |
| Basic Static Load Rating C₀ (kN) | 815 kN |
| Limiting Speed – Grease (r/min) | 3200 r/min |
| Limiting Speed – Oil-air (r/min) | 3600 r/min |
| Reference Grease Quantity Gref (cm³) | 105 cm³ |
| Fatigue Load Limit Pᵤ (kN) | 83 kN |
| Axial Static Stiffness – Guideline Value (N/µm) | 3790 N/µm |
| Material | |
| Lubrication Groove Width | 8.9 mm |
| Lubrication Holes (qty × Ø mm) | 4.5 |
| Weight (kg) | 12.4 kg |
| Radial Internal Clearance | C1 mm |
| Internal Design & Weight | |
| Cage Type | Machined Metal Cage |
| Mounting Dimensions | |
| Lubrication Port Thread / Size Φ1 | 230.8 |
NN 3034 K/SPW33 260 mm 170 mm 67 mm Frequently Asked Questions about NN 3034 K/SPW33 Super-Precision Cylindrical Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Every production batch of CHG Bearing NN 3034 K/SPW33 Super-Precision 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.
Standard batches of CHG Bearing NN 3034 K/SPW33 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.
Built for demanding industrial environments, the NN 3034 K/SPW33 Super-Precision Cylindrical Roller Bearings by CHG Bearing boasts a dynamic load rating (Cr) of standard dynamic and a static load threshold (C0r) of standard static. The optimized internal raceway geometry balances stress distribution, mitigating edge loading even when operating under peak mechanical stresses.
Quality starts with raw material selection: CHG Bearing crafts NN 3034 K/SPW33 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.
