Manufactured by CHG Bearing, the 1787/1640 is a precision Four-Point Contact Ball Slewing Bearings. Key dimensional parameters include a 1640 mm bore diameter, a 2050 mm outer diameter, and a 160 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.
1787/1640 - Four-Point Contact Ball Slewing Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 1787/1640 |
| 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) | 1640 mm |
| Width (B) | 160 mm |
| Outer Diameter (D) | 2050 mm |
| Number of Lubrication Holes n1 | 3 |
| Mounting Dimensions | |
| Outer Ring Mounting Hole P.C.D. D1 | 1990 mm |
| Inner Ring Mounting Hole P.C.D. D2 | 1710 mm |
| Lubrication Port Thread / Size Φ1 | 14 |
| Inner Ring Mounting Hole Count n2 | 30 |
| Inner Ring Mounting Hole Specification Φ2 (Ø / Thread) | 28 |
| Outer Ring Mounting Hole Count n3 | 30 |
| Outer Ring Mounting Hole Specification Φ3 (Ø / Thread) | 28 |
| Gear Data | |
| Gear Module m | 10 mm |
| Gear Tip Diameter De | 2100 mm |
| Number of Gear Teeth z | 210 |
| Gear Face Width b | 105 mm |
| Addendum Modification Coefficient x | -0.6 |
| Reference Data | |
| Reference Mass (kg) | 40 kg |
1787/1640 2050 mm 1990 mm 1640 mm 160 mm 1710 mm Frequently Asked Questions about 1787/1640 Four-Point Contact Ball Slewing Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
To match diverse operational dynamics, CHG Bearing supplies 1787/1640 with multiple cage configurations: high-strength pressed steel ribbon cages for standard duty, solid machined brass cages (M/CA) for heavy vibration and shock loads, or lightweight glass-fiber reinforced polyamide cages (TN9/TVP) for high acceleration and ultra-low noise.
The Open Type engineered for 1787/1640 by CHG Bearing utilizes precision non-contact metal shields or reinforced NBR/FKM contact lip seals. This barrier prevents particulate ingress, washdown fluids, and abrasive dust from reaching the raceways while eliminating grease leakage under centrifugal forces.
As standard production, CHG Bearing subjects 1787/1640 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.
To safeguard CHG Bearing 1787/1640 against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (1640 mm x 2050 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
