Manufactured by CHG Bearing, the NNU 4932 BK/SPW33 is a precision Super-Precision Cylindrical Roller Bearings. Key dimensional parameters include a 160 mm bore diameter, a 220 mm outer diameter, and a 60 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 4932 BK/SPW33 - Super-Precision Cylindrical Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NNU 4932 BK/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 | 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) | 160 mm |
| Width (B) | 60 mm |
| Outer Diameter (D) | 220 mm |
| Minimum Chamfer Dimension rmin | 2 mm |
| Inner Ring Chamfer | 2 mm |
| Outer Ring Chamfer | 2 mm |
| End-face Height Difference h | 2 mm |
| Outer-Ring Land Diameter (L2 / D1) | 200.9 mm |
| Inner Ring Raceway Diameter F | 178.5 mm |
| Shaft Shoulder Diameter dₐ, min. | 170 mm |
| Shaft Shoulder Diameter dₐ, max. – NNU Design | 176 mm |
| Housing Shoulder Diameter Dₐ, max. | 210 mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 330 kN |
| Basic Static Load Rating C₀ (kN) | 680 kN |
| Limiting Speed – Grease (r/min) | 3600 r/min |
| Limiting Speed – Oil-air (r/min) | 4000 r/min |
| Reference Grease Quantity Gref (cm³) | 63 cm³ |
| Fatigue Load Limit Pᵤ (kN) | 72 kN |
| Axial Static Stiffness – Guideline Value (N/µm) | 4310 N/µm |
| Material | |
| Lubrication Groove Width | 5.5 mm |
| Lubrication Holes (qty × Ø mm) | 3 |
| Weight (kg) | 6.44 kg |
| Radial Internal Clearance | C1 mm |
| Internal Design & Weight | |
| Cage Type | Machined Metal Cage |
| Mounting Dimensions | |
| Lubrication Port Thread / Size Φ1 | 179.8 |
NNU 4932 BK/SPW33 220 mm 160 mm 60 mm Frequently Asked Questions about NNU 4932 BK/SPW33 Super-Precision Cylindrical Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
To safeguard CHG Bearing NNU 4932 BK/SPW33 against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (160 mm x 220 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
Beyond standard alloy steel, CHG Bearing can customize the NNU 4932 BK/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.
Each NNU 4932 BK/SPW33 produced in CHG Bearing manufacturing facilities features accurately profiled corner chamfers complying with DIN 5412 / ISO standard corner radii. When designing mating shafts and housing shoulders, machining an undercut or fillet radius strictly within the inner ring clearance limit (160 mm bore side) ensures perfect planar contact without edge binding.
Following standard ISO 281 fatigue calculation guidelines, the nominal rating life (L10) of CHG Bearing NNU 4932 BK/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.
