Manufactured by CHG Bearing, the 6397/3925 is a precision Three-row Cylindrical Roller Slewing Bearings. Key dimensional parameters include a 3925 mm bore diameter, a 4418 mm outer diameter, and a 222 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.
6397/3925 - Three-row Cylindrical Roller Slewing Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 6397/3925 |
| Brand | CHG® |
| Gear Type | Internal Gear |
| Characteristics | |
| Bearing Type | Three-row Cylindrical Roller Slewing Bearing |
| Row Configuration | Three-row |
| Dimensions | |
| Bore Diameter (d) | 3925 mm |
| Width (B) | 222 mm |
| Outer Diameter (D) | 4418 mm |
| Inner/Outer Ring Height H1 | 225 mm |
| End-face Height Difference h | 40 mm |
| Number of Lubrication Holes n1 | 4 |
| Mounting Dimensions | |
| Outer Ring Mounting Hole P.C.D. D1 | 3070 mm |
| Inner Ring Mounting Hole P.C.D. D2 | 2755 mm |
| Lubrication Port Thread / Size Φ1 | M14×1.5 |
| Inner Ring Mounting Hole Count n2 | 80 |
| Inner Ring Mounting Hole Specification Φ2 (Ø / Thread) | 38 |
| Outer Ring Mounting Hole Count n3 | 76 |
| Outer Ring Mounting Hole Specification Φ3 (Ø / Thread) | 38 |
| Gear Data | |
| Gear Module m | 20 mm |
| Gear Tip Diameter De | 2608.8 mm |
| Number of Gear Teeth z | 132 |
| Gear Face Width b | 180 mm |
| Addendum Modification Coefficient x | 0 |
| Reference Data | |
| Reference Mass (kg) | 3393 kg |
6397/3925 4418 mm 3925 mm 222 mm 3070 mm 2755 mm Frequently Asked Questions about 6397/3925 Three-row Cylindrical Roller Slewing Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Quality starts with raw material selection: CHG Bearing crafts 6397/3925 inner and outer rings from high-purity High-Quality Chrome Steel (GCr15/100Cr6). Our raw billets undergo vacuum degassing and secondary ESR (electroslag remelting) processes to drastically eliminate non-metallic sulfide and oxide inclusions, elevating subsurface contact fatigue resistance.
As standard production, CHG Bearing subjects 6397/3925 to precision bainite or martensite quenching, offering dimensional stability up to 120°C (248°F). For high-heat processing equipment, CHG Bearing also supplies custom S0 (150°C), S1 (200°C), or S2 (250°C) stabilization heat treatments upon request to prevent residual austenite transformation.
In its sealed configuration (Open Type), CHG Bearing pre-charges 6397/3925 with premium wide-temperature lithium-complex or polyurea grease, calibrated to a 30%–35% cavity volume ratio. For open-type variants, synthetic PAO or refined mineral lubricating oils with appropriate EP (Extreme Pressure) additives should be circulated.
To safeguard CHG Bearing 6397/3925 against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (3925 mm x 4418 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
