Manufactured by CHG Bearing, the NN 3048/SPW33 is a precision Super-Precision Cylindrical Roller Bearings. Key dimensional parameters include a 240 mm bore diameter, a 360 mm outer diameter, and a 92 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 3048/SPW33 - Super-Precision Cylindrical Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NN 3048/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) | 240 mm |
| Width (B) | 92 mm |
| Outer Diameter (D) | 360 mm |
| Minimum Chamfer Dimension rmin | 2.5 mm |
| Inner Ring Chamfer | 3 mm |
| End-face Height Difference h | 2 mm |
| Inner-Ring Land Diameter (L1 / d1) | 285.2 mm |
| Outer Ring Raceway Diameter E | 330 mm |
| Shaft Shoulder Diameter dₐ, min. | 253 mm |
| Housing Shoulder Diameter Dₐ, min. | 333 mm |
| Housing Shoulder Diameter Dₐ, max. | 347 mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 842 kN |
| Basic Static Load Rating C₀ (kN) | 1560 kN |
| Limiting Speed – Grease (r/min) | 2200 r/min |
| Limiting Speed – Oil-air (r/min) | 2600 r/min |
| Reference Grease Quantity Gref (cm³) | 288 cm³ |
| Fatigue Load Limit Pᵤ (kN) | 153 kN |
| Axial Static Stiffness – Guideline Value (N/µm) | 5180 N/µm |
| Material | |
| Lubrication Groove Width | 15.2 mm |
| Lubrication Holes (qty × Ø mm) | 7.5 |
| Weight (kg) | 30.9 kg |
| Radial Internal Clearance | C1 mm |
| Internal Design & Weight | |
| Cage Type | Machined Metal Cage |
| Mounting Dimensions | |
| Lubrication Port Thread / Size Φ1 | 322.5 |
NN 3048/SPW33 360 mm 240 mm 92 mm Frequently Asked Questions about NN 3048/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 3048/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.
As a primary manufacturer, CHG Bearing supports both trial batch evaluations and container-load supply for NN 3048/SPW33. Standard catalog sizes are stocked for rapid 3–7 day dispatch, while high-volume OEM production runs typically dispatch within 30–45 days.
When fitting NN 3048/SPW33 over a 240 mm shaft, CHG Bearing strictly recommends uniform induction heating (controlled between 90°C and 110°C) or precision hydraulic press sleeves. Under no circumstances should direct impact blows be struck against the rings or cage, as shock loads cause brinelling indents and premature spalling.
Built for demanding industrial environments, the NN 3048/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.
