Manufactured by CHG Bearing, the 6397/3870 is a precision Three-row Cylindrical Roller Slewing Bearings. Key dimensional parameters include a 3870 mm bore diameter, a 4423 mm outer diameter, and a 240 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.
6397/3870 - Three-row Cylindrical Roller Slewing Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 6397/3870 |
| Brand | CHG® |
| Gear Type | Internal Gear |
| Characteristics | |
| Bearing Type | Three-row Cylindrical Roller Slewing Bearing |
| Row Configuration | Three-row |
| Dimensions | |
| Bore Diameter (d) | 3870 mm |
| Width (B) | 240 mm |
| Outer Diameter (D) | 4423 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 | 2750 mm |
| Lubrication Port Thread / Size Φ1 | M14×1.5 |
| Inner Ring Mounting Hole Count n2 | 2 |
| Inner Ring Mounting Hole Specification Φ2 (Ø / Thread) | M30 |
| Outer Ring Mounting Hole Count n3 | 8 |
| Outer Ring Mounting Hole Specification Φ3 (Ø / Thread) | 32 |
| 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) | 3699 kg |
6397/3870 4423 mm 3870 mm 240 mm 3070 mm 2750 mm Frequently Asked Questions about 6397/3870 Three-row Cylindrical Roller Slewing Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
As a primary manufacturer, CHG Bearing supports both trial batch evaluations and container-load supply for 6397/3870. Standard catalog sizes are stocked for rapid 3–7 day dispatch, while high-volume OEM production runs typically dispatch within 30–45 days.
Yes, 100% of 6397/3870 Three-row Cylindrical Roller Slewing Bearings leaving CHG Bearing production lines are subjected to multi-frequency Anderometer sound testing. All units satisfy baseline Z1V1 levels, with dedicated quiet-running electric motor quality (EMQ) lots certified to Z2V2 and Z3V3 standards for silent machinery integration.
Each 6397/3870 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 (3870 mm bore side) ensures perfect planar contact without edge binding.
To extend the trouble-free lifespan of CHG Bearing 6397/3870, preventive maintenance routines should monitor operating housing temperature (normally maintaining below 70°C) and conduct regular vibration FFT analysis to identify early raceway micro-pitting before unexpected line halts occur.
