Manufactured by CHG Bearing, the NN 3040 K/SPW33 is a precision Super-Precision Cylindrical Roller Bearings. Key dimensional parameters include a 200 mm bore diameter, a 310 mm outer diameter, and a 82 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 3040 K/SPW33 - Super-Precision Cylindrical Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NN 3040 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) | 200 mm |
| Width (B) | 82 mm |
| Outer Diameter (D) | 310 mm |
| Minimum Chamfer Dimension rmin | 2 mm |
| Inner Ring Chamfer | 2.1 mm |
| Outer Ring Chamfer | 1.1 mm |
| End-face Height Difference h | 3 mm |
| Inner-Ring Land Diameter (L1 / d1) | 242 mm |
| Outer Ring Raceway Diameter E | 282 mm |
| Shaft Shoulder Diameter dₐ, min. | 211 mm |
| Housing Shoulder Diameter Dₐ, min. | 285 mm |
| Housing Shoulder Diameter Dₐ, max. | 299 mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 644 kN |
| Basic Static Load Rating C₀ (kN) | 1140 kN |
| Limiting Speed – Grease (r/min) | 2600 r/min |
| Limiting Speed – Oil-air (r/min) | 3000 r/min |
| Reference Grease Quantity Gref (cm³) | 191 cm³ |
| Fatigue Load Limit Pᵤ (kN) | 118 kN |
| Axial Static Stiffness – Guideline Value (N/µm) | 4380 N/µm |
| Material | |
| Lubrication Groove Width | 12.2 mm |
| Lubrication Holes (qty × Ø mm) | 6 |
| Weight (kg) | 21.8 kg |
| Radial Internal Clearance | C1 mm |
| Internal Design & Weight | |
| Cage Type | Machined Metal Cage |
| Mounting Dimensions | |
| Lubrication Port Thread / Size Φ1 | 275.3 |
NN 3040 K/SPW33 310 mm 200 mm 82 mm Frequently Asked Questions about NN 3040 K/SPW33 Super-Precision Cylindrical Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
As standard production, CHG Bearing subjects NN 3040 K/SPW33 to precision bainite or martensite quenching, offering dimensional stability up to 120°C (248°F). For high-heat processing equipment, CHG Bearing also supplies custom S0 (150°C), S1 (200°C), or S2 (250°C) stabilization heat treatments upon request to prevent residual austenite transformation.
To ensure optimum performance of CHG Bearing NN 3040 K/SPW33 Super-Precision Cylindrical Roller Bearings under general rotational loads, our application engineers advise an inner-ring shaft tolerance of m5 or k5 for the 200 mm bore. For the 310 mm outer ring, an H7 or J7 housing bore fit is recommended to eliminate creep while accommodating normal thermal gradient expansion.
Model NN 3040 K/SPW33 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 200 mm) and steep thermal gradients between inner and outer rings.
Sourcing NN 3040 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.
