Manufactured by CHG Bearing, the NNU 49/600 BK/SPW33X is a precision Super-Precision Cylindrical Roller Bearings. Key dimensional parameters include a 600 mm bore diameter, a 800 mm outer diameter, and a 200 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.
NNU 49/600 BK/SPW33X - Super-Precision Cylindrical Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NNU 49/600 BK/SPW33X |
| 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 | NNU 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 | 3 |
| Number of Ribs – Inner Ring | 0 |
| Dimensions | |
| Bore Diameter (d) | 600 mm |
| Width (B) | 200 mm |
| Outer Diameter (D) | 800 mm |
| Minimum Chamfer Dimension rmin | 4 mm |
| Inner Ring Chamfer | 5 mm |
| Outer Ring Chamfer | 2.5 mm |
| End-face Height Difference h | 5.5 mm |
| Outer-Ring Land Diameter (L2 / D1) | 733.2 mm |
| Inner Ring Raceway Diameter F | 666 mm |
| Shaft Shoulder Diameter dₐ, min. | 648 mm |
| Shaft Shoulder Diameter dₐ, max. – NNU Design | 662 mm |
| Housing Shoulder Diameter Dₐ, max. | 782 mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 3580 kN |
| Basic Static Load Rating C₀ (kN) | 10200 kN |
| Limiting Speed – Grease (r/min) | 800 r/min |
| Limiting Speed – Oil-air (r/min) | 670 r/min |
| Fatigue Load Limit Pᵤ (kN) | 800 kN |
| Material | |
| Lubrication Groove Width | 22.3 mm |
| Lubrication Holes (qty × Ø mm) | 12 |
| Weight (kg) | 278 kg |
| Radial Internal Clearance | C1 mm |
NNU 49/600 BK/SPW33X 800 mm 600 mm 200 mm Frequently Asked Questions about NNU 49/600 BK/SPW33X Super-Precision Cylindrical Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
The CHG Bearing NNU 49/600 BK/SPW33X 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.
Built for demanding industrial environments, the NNU 49/600 BK/SPW33X 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.
To safeguard CHG Bearing NNU 49/600 BK/SPW33X against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (600 mm x 800 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
To ensure optimum performance of CHG Bearing NNU 49/600 BK/SPW33X Super-Precision Cylindrical Roller Bearings under general rotational loads, our application engineers advise an inner-ring shaft tolerance of m5 or k5 for the 600 mm bore. For the 800 mm outer ring, an H7 or J7 housing bore fit is recommended to eliminate creep while accommodating normal thermal gradient expansion.
