Manufactured by CHG Bearing, the 021.25.560 is a precision Double-Row Ball Slewing Bearings. Key dimensional parameters include a 444 mm bore diameter, a 676 mm outer diameter, and a 106 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.
021.25.560 - Double-Row Ball Slewing Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 021.25.560 |
| Brand | CHG® |
| Gear Type | External Gear |
| Characteristics | |
| Bearing Type | Double-Row Ball Slewing Bearing |
| Row Configuration | Double Row |
| Dimensions | |
| Bore Diameter (d) | 444 mm |
| Width (B) | 106 mm |
| Outer Diameter (D) | 676 mm |
| End-face Height Difference h | 26 mm |
| Number of Lubrication Holes n1 | 4 |
| Ring Height H1 | 96 mm |
| Mounting Hole Diameter Φ | 18 mm |
| Performance | |
| Mounting Hole Count n | 20 |
| Tangential Tooth Force, Normalized Z (×10⁴ N) | 3.7 ×10⁴ N |
| Tangential Tooth Force, Quenched T (×10⁴ N) | 5.2 ×10⁴ N |
| Mounting Dimensions | |
| Outer Ring Mounting Hole P.C.D. D1 | 640 mm |
| Inner Ring Mounting Hole P.C.D. D2 | 480 mm |
| Lubrication Port Thread / Size Φ1 | M10×1 |
| Gear Data | |
| Gear Module m | 5 mm |
| Gear Tip Diameter De | 704 mm |
| Number of Gear Teeth z | 138 |
| Gear Face Width b | 60 mm |
| Addendum Modification Coefficient x | 0.5 |
| Reference Data | |
| Reference Mass (kg) | 115 kg |
021.25.560 676 mm 444 mm 106 mm 640 mm 480 mm Frequently Asked Questions about 021.25.560 Double-Row Ball Slewing Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
To ensure optimum performance of CHG Bearing 021.25.560 Double-Row Ball Slewing Bearings under general rotational loads, our application engineers advise an inner-ring shaft tolerance of m5 or k5 for the 444 mm bore. For the 676 mm outer ring, an H7 or J7 housing bore fit is recommended to eliminate creep while accommodating normal thermal gradient expansion.
As a primary manufacturer, CHG Bearing supports both trial batch evaluations and container-load supply for 021.25.560. Standard catalog sizes are stocked for rapid 3–7 day dispatch, while high-volume OEM production runs typically dispatch within 30–45 days.
Each 021.25.560 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 (444 mm bore side) ensures perfect planar contact without edge binding.
To safeguard CHG Bearing 021.25.560 against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (444 mm x 676 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
