Manufactured by CHG Bearing, the 2768/1440G is a precision Four-Point Contact Ball Slewing Bearings. Key dimensional parameters include a 1440 mm bore diameter, a 1780 mm outer diameter, and a 104 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.
2768/1440G - Four-Point Contact Ball Slewing Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 2768/1440G |
| Brand | CHG® |
| Gear Type | Internal Gear |
| Characteristics | |
| Bearing Type | Single-row Four-point Contact Ball Slewing Bearing |
| Row Configuration | Single-row |
| Dimensions | |
| Bore Diameter (d) | 1440 mm |
| Width (B) | 104 mm |
| Outer Diameter (D) | 1780 mm |
| Number of Lubrication Holes n1 | 6 |
| Mounting Dimensions | |
| Outer Ring Mounting Hole P.C.D. D1 | 1730 mm |
| Inner Ring Mounting Hole P.C.D. D2 | 1494 mm |
| Lubrication Port Thread / Size Φ1 | 12 |
| Inner Ring Mounting Hole Count n2 | 48 |
| Inner Ring Mounting Hole Specification Φ2 (Ø / Thread) | 20 |
| Outer Ring Mounting Hole Count n3 | 48 |
| Outer Ring Mounting Hole Specification Φ3 (Ø / Thread) | 22 |
| Gear Data | |
| Gear Module m | 8 mm |
| Gear Tip Diameter De | 1400 mm |
| Number of Gear Teeth z | 177 |
| Gear Face Width b | 52 mm |
| Addendum Modification Coefficient x | 0 |
| Reference Data | |
| Reference Mass (kg) | 555 kg |
2768/1440G 1780 mm 1440 mm 1730 mm 1494 mm 104 mm Frequently Asked Questions about 2768/1440G Four-Point Contact Ball Slewing Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Engineered according to international ISO boundary plans, CHG Bearing supplies 2768/1440G with a precision bore diameter (d) of 1440 mm, an outside diameter (D) of 1780 mm, and a nominal ring width (B) of 104 mm. This configuration yields an effective cross-sectional wall thickness of 170.0 mm and an envelope ratio (D/d) of 1.24, delivering compact rigidity for OEM machinery housings.
The CHG Bearing 2768/1440G 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.
In its sealed configuration (Open Type), CHG Bearing pre-charges 2768/1440G 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 2768/1440G against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (1440 mm x 1780 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
