Manufactured by CHG Bearing, the 1788/1040G2K2 is a precision Four-Point Contact Ball Slewing Bearings. Key dimensional parameters include a 1040 mm bore diameter, a mm outer diameter, and a 70 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.
1788/1040G2K2 - Four-Point Contact Ball Slewing Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 1788/1040G2K2 |
| 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) | 1040 mm |
| Width (B) | 70 mm |
| Number of Lubrication Holes n1 | 6 |
| Mounting Dimensions | |
| Outer Ring Mounting Hole P.C.D. D1 | 1220 mm |
| Inner Ring Mounting Hole P.C.D. D2 | 1080 mm |
| Lubrication Port Thread / Size Φ1 | 10 |
| Inner Ring Mounting Hole Count n2 | 30 |
| Inner Ring Mounting Hole Specification Φ2 (Ø / Thread) | 17.5 |
| Outer Ring Mounting Hole Count n3 | 30 |
| Outer Ring Mounting Hole Specification Φ3 (Ø / Thread) | 16 |
| Gear Data | |
| Gear Module m | 5 mm |
| Gear Tip Diameter De | 1310 mm |
| Number of Gear Teeth z | 260 |
| Gear Face Width b | 60 mm |
| Addendum Modification Coefficient x | 0 |
| Reference Data | |
| Reference Mass (kg) | 224 kg |
1788/1040G2K2 mm 1220 mm 1040 mm 70 mm 1080 mm Frequently Asked Questions about 1788/1040G2K2 Four-Point Contact Ball Slewing Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
When fitting 1788/1040G2K2 over a 1040 mm shaft, CHG Bearing strictly recommends uniform induction heating (controlled between 90°C and 110°C) or precision hydraulic press sleeves. Under no circumstances should direct impact blows be struck against the rings or cage, as shock loads cause brinelling indents and premature spalling.
To match diverse operational dynamics, CHG Bearing supplies 1788/1040G2K2 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.
Yes, CHG Bearing works closely with industrial OEMs and brand distributors. We offer turnkey custom engineering for 1788/1040G2K2, including laser-etched customer logos, custom internal radial clearances, specialized grease formulations, and bespoke protective packaging.
To ensure optimum performance of CHG Bearing 1788/1040G2K2 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 1040 mm bore. For the mm outer ring, an H7 or J7 housing bore fit is recommended to eliminate creep while accommodating normal thermal gradient expansion.
