Manufactured by CHG Bearing, the 1788/1877 is a precision Four-Point Contact Ball Slewing Bearings. Key dimensional parameters include a 1877 mm bore diameter, a 2125 mm outer diameter, and a 111 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.
1788/1877 - Four-Point Contact Ball Slewing Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 1788/1877 |
| 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) | 1877 mm |
| Width (B) | 111 mm |
| Outer Diameter (D) | 2125 mm |
| Number of Lubrication Holes n1 | 5 |
| Mounting Dimensions | |
| Outer Ring Mounting Hole P.C.D. D1 | 2068 mm |
| Inner Ring Mounting Hole P.C.D. D2 | 1927 mm |
| Lubrication Port Thread / Size Φ1 | 10 |
| Inner Ring Mounting Hole Count n2 | 40 |
| Inner Ring Mounting Hole Specification Φ2 (Ø / Thread) | 22 |
| Outer Ring Mounting Hole Count n3 | 40 |
| Outer Ring Mounting Hole Specification Φ3 (Ø / Thread) | 20 |
| Gear Data | |
| Gear Module m | 14 mm |
| Gear Tip Diameter De | 2195.2 mm |
| Number of Gear Teeth z | 154 |
| Gear Face Width b | 101 mm |
| Addendum Modification Coefficient x | 0.5 |
| Reference Data | |
| Reference Mass (kg) | 600 kg |
1788/1877 2125 mm 2068 mm 1877 mm 111 mm 1927 mm Frequently Asked Questions about 1788/1877 Four-Point Contact Ball Slewing Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Standard batches of CHG Bearing 1788/1877 conform strictly to ISO Class Normal (ABEC-1). For high-precision machine tool spindles, gearboxes, or robotics requiring tighter runouts, CHG Bearing can provide custom batches graded to ISO Class 6 (P6/ABEC-3) or ISO Class 5 (P5/ABEC-5) with 100% micrometer verification.
Beyond standard alloy steel, CHG Bearing can customize the 1788/1877 Four-Point Contact Ball Slewing Bearings using AISI 440C stainless steel, black oxide coating, zinc-nickel plating, or hybrid ceramic (Si3N4) balls for applications involving chemical exposure, marine salt fog, or galvanic current hazards.
To ensure optimum performance of CHG Bearing 1788/1877 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 1877 mm bore. For the 2125 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 1788/1877. Standard catalog sizes are stocked for rapid 3–7 day dispatch, while high-volume OEM production runs typically dispatch within 30–45 days.
