Manufactured by CHG Bearing, the NNU3952 is a precision Double Row Cylindrical Roller Bearings. Key dimensional parameters include a 260 mm bore diameter, a 360 mm outer diameter, and a 75 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.
NNU3952 - Double Row Cylindrical Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NNU3952 |
| Brand | CHG® |
| Characteristics | |
| Bearing Type | Double Row Cylindrical Roller Bearing |
| Number of Rows | Double Row |
| Tolerance Class | P0 |
| Dimensions | |
| Bore Diameter (d) | 260 mm |
| Width (B) | 75 mm |
| Outer Diameter (D) | 360 mm |
| Bore Diameter Tolerance | -0.035 – 0 mm |
| Outside Diameter Tolerance | -0.040 – 0 mm |
| Width Tolerance | -0.40 – 0 mm |
| Enveloping Circle Diameter Fw | 286 mm |
| Inner Ring Chamfer | 2.1 min mm |
| Outer Ring Chamfer | 2.1 min mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 703 kN |
| Basic Static Load Rating C0 (kN) | 1370 kN |
| Material | |
| Mass (kg) | 22.6 kg |
| Ring Material | Bearing Steel |
| Rolling Element Material | Bearing Steel |
| Cage Material | Brass |
NNU3952 360 mm 260 mm 286 mm 75 mm Frequently Asked Questions about NNU3952 Double Row Cylindrical Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Model NNU3952 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 260 mm) and steep thermal gradients between inner and outer rings.
The CHG Bearing NNU3952 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.
Beyond standard alloy steel, CHG Bearing can customize the NNU3952 Double Row 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.
Engineered according to international ISO boundary plans, CHG Bearing supplies NNU3952 with a precision bore diameter (d) of 260 mm, an outside diameter (D) of 360 mm, and a nominal ring width (B) of 75 mm. This configuration yields an effective cross-sectional wall thickness of 50.0 mm and an envelope ratio (D/d) of 1.38, delivering compact rigidity for OEM machinery housings.
