Manufactured by CHG Bearing, the NN 3048 K/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 K/SPW33 - Super-Precision Cylindrical Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NN 3048 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) | 240 mm |
| Width (B) | 92 mm |
| Outer Diameter (D) | 360 mm |
| Minimum Chamfer Dimension rmin | 2.5 mm |
| Inner Ring Chamfer | 3 mm |
| Outer Ring Chamfer | 1.1 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 K/SPW33 360 mm 240 mm 92 mm Frequently Asked Questions about NN 3048 K/SPW33 Super-Precision Cylindrical Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
To safeguard CHG Bearing NN 3048 K/SPW33 against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (240 mm x 360 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
The CHG Bearing NN 3048 K/SPW33 is rated for limiting speeds up to standard rated RPM under forced oil-mist or circulating oil lubrication regimes. When lubricated with factory-filled synthetic high-speed grease, safe continuous velocity is maintained at approximately 75% to 85% of the maximum nominal limit, preventing thermal runaway.
As a primary manufacturer, CHG Bearing supports both trial batch evaluations and container-load supply for NN 3048 K/SPW33. Standard catalog sizes are stocked for rapid 3–7 day dispatch, while high-volume OEM production runs typically dispatch within 30–45 days.
The Open Type engineered for NN 3048 K/SPW33 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.
