Manufactured by CHG Bearing, the NN 3036/SPW33 is a precision Super-Precision Cylindrical Roller Bearings. Key dimensional parameters include a 180 mm bore diameter, a 280 mm outer diameter, and a 74 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 3036/SPW33 - Super-Precision Cylindrical Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NN 3036/SPW33 |
| 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) | 180 mm |
| Width (B) | 74 mm |
| Outer Diameter (D) | 280 mm |
| Minimum Chamfer Dimension rmin | 2 mm |
| Inner Ring Chamfer | 2.1 mm |
| End-face Height Difference h | 3 mm |
| Inner-Ring Land Diameter (L1 / d1) | 218.2 mm |
| Outer Ring Raceway Diameter E | 255 mm |
| Shaft Shoulder Diameter dₐ, min. | 191 mm |
| Housing Shoulder Diameter Dₐ, min. | 257 mm |
| Housing Shoulder Diameter Dₐ, max. | 269 mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 561 kN |
| Basic Static Load Rating C₀ (kN) | 1000 kN |
| Limiting Speed – Grease (r/min) | 3000 r/min |
| Limiting Speed – Oil-air (r/min) | 3400 r/min |
| Reference Grease Quantity Gref (cm³) | 138 cm³ |
| Fatigue Load Limit Pᵤ (kN) | 102 kN |
| Axial Static Stiffness – Guideline Value (N/µm) | 3970 N/µm |
| Material | |
| Lubrication Groove Width | 11.45 mm |
| Lubrication Holes (qty × Ø mm) | 6 |
| Weight (kg) | 16.1 kg |
| Radial Internal Clearance | C1 mm |
| Internal Design & Weight | |
| Cage Type | Machined Metal Cage |
| Mounting Dimensions | |
| Lubrication Port Thread / Size Φ1 | 248.9 |
NN 3036/SPW33 280 mm 180 mm 74 mm Frequently Asked Questions about NN 3036/SPW33 Super-Precision Cylindrical Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
To ensure optimum performance of CHG Bearing NN 3036/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 180 mm bore. For the 280 mm outer ring, an H7 or J7 housing bore fit is recommended to eliminate creep while accommodating normal thermal gradient expansion.
Model NN 3036/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 180 mm) and steep thermal gradients between inner and outer rings.
Absolutely. The CHG Bearing NN 3036/SPW33 Super-Precision Cylindrical Roller Bearings is a 1:1 direct interchange for renowned brands, matching part numbers: SKF NN 3036/SPW33, FAG NN 3036/SPW33, NSK NN 3036/SPW33. It shares identical envelope boundary dimensions, load capacities, and shaft fits, allowing instant drop-in replacement without retrofitting your machinery.
Following standard ISO 281 fatigue calculation guidelines, the nominal rating life (L10) of CHG Bearing NN 3036/SPW33 correlates its dynamic capacity (standard dynamic) with equivalent dynamic loads. In controlled industrial settings with proper contamination-free filtration, field data confirms continuous operational longevity exceeding 20,000 to 50,000 service hours.
