Manufactured by CHG Bearing, the 1787/3250 is a precision Four-Point Contact Ball Slewing Bearings. Key dimensional parameters include a 3250 mm bore diameter, a 3816 mm outer diameter, and a 175 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.
1787/3250 - Four-Point Contact Ball Slewing Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 1787/3250 |
| Brand | CHG® |
| Gear Type | External Gear |
| Characteristics | |
| Bearing Type | Single-row Four-point Contact Ball Slewing Bearing |
| Row Configuration | Single-row |
| Dimensions | |
| Bore Diameter (d) | 3250 mm |
| Width (B) | 175 mm |
| Outer Diameter (D) | 3816 mm |
| Number of Lubrication Holes n1 | 12 |
| Mounting Dimensions | |
| Outer Ring Mounting Hole P.C.D. D1 | 3600 mm |
| Inner Ring Mounting Hole P.C.D. D2 | 3340 mm |
| Lubrication Port Thread / Size Φ1 | 10 |
| Inner Ring Mounting Hole Count n2 | 72 |
| Inner Ring Mounting Hole Specification Φ2 (Ø / Thread) | 36 |
| Outer Ring Mounting Hole Count n3 | 72 |
| Outer Ring Mounting Hole Specification Φ3 (Ø / Thread) | 39 |
| Gear Data | |
| Gear Module m | 24 mm |
| Gear Tip Diameter De | 3816 mm |
| Number of Gear Teeth z | 157 |
| Gear Face Width b | 160 mm |
| Addendum Modification Coefficient x | 0 |
| Reference Data | |
| Reference Mass (kg) | 3273 kg |
1787/3250 3816 mm 3600 mm 3250 mm 175 mm 3340 mm Frequently Asked Questions about 1787/3250 Four-Point Contact Ball Slewing Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
To safeguard CHG Bearing 1787/3250 against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (3250 mm x 3816 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
Absolutely. The CHG Bearing 1787/3250 Four-Point Contact Ball Slewing Bearings is a 1:1 direct interchange for renowned brands, matching part numbers: SKF 1787/3250, FAG 1787/3250, NSK 1787/3250. It shares identical envelope boundary dimensions, load capacities, and shaft fits, allowing instant drop-in replacement without retrofitting your machinery.
Following standard ISO 281 fatigue calculation guidelines, the nominal rating life (L10) of CHG Bearing 1787/3250 correlates its dynamic capacity (standard dynamic) with equivalent dynamic loads. In controlled industrial settings with proper contamination-free filtration, field data confirms continuous operational longevity exceeding 20,000 to 50,000 service hours.
In its sealed configuration (Open Type), CHG Bearing pre-charges 1787/3250 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.
