Manufactured by CHG Bearing, the D1787/380 is a precision Four-Point Contact Ball Slewing Bearings. Key dimensional parameters include a 380 mm bore diameter, a 523 mm outer diameter, and a 52 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.
D1787/380 - Four-Point Contact Ball Slewing Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | D1787/380 |
| 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) | 380 mm |
| Width (B) | 52 mm |
| Outer Diameter (D) | 523 mm |
| Number of Lubrication Holes n1 | 2 |
| Mounting Dimensions | |
| Outer Ring Mounting Hole P.C.D. D1 | 498 mm |
| Inner Ring Mounting Hole P.C.D. D2 | 408 mm |
| Lubrication Port Thread / Size Φ1 | 10 |
| Inner Ring Mounting Hole Count n2 | 16 |
| Inner Ring Mounting Hole Specification Φ2 (Ø / Thread) | 1/2-13UNC |
| Outer Ring Mounting Hole Count n3 | 16 |
| Outer Ring Mounting Hole Specification Φ3 (Ø / Thread) | 1/2-13UNC |
| Gear Data | |
| Gear Module m | 5 mm |
| Gear Tip Diameter De | 550 mm |
| Number of Gear Teeth z | 108 |
| Gear Face Width b | 38 mm |
| Addendum Modification Coefficient x | 0 |
| Reference Data | |
| Reference Mass (kg) | 34.8 kg |
D1787/380 523 mm 498 mm 380 mm 52 mm 408 mm Frequently Asked Questions about D1787/380 Four-Point Contact Ball Slewing Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
The Open Type engineered for D1787/380 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.
Engineered according to international ISO boundary plans, CHG Bearing supplies D1787/380 with a precision bore diameter (d) of 380 mm, an outside diameter (D) of 523 mm, and a nominal ring width (B) of 52 mm. This configuration yields an effective cross-sectional wall thickness of 71.5 mm and an envelope ratio (D/d) of 1.38, delivering compact rigidity for OEM machinery housings.
To ensure optimum performance of CHG Bearing D1787/380 Four-Point Contact Ball Slewing Bearings under general rotational loads, our application engineers advise an inner-ring shaft tolerance of m5 or k5 for the 380 mm bore. For the 523 mm outer ring, an H7 or J7 housing bore fit is recommended to eliminate creep while accommodating normal thermal gradient expansion.
As standard production, CHG Bearing subjects D1787/380 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.
