Manufactured by CHG Bearing, the 2787/2553 is a precision Four-Point Contact Ball Slewing Bearings. Key dimensional parameters include a 2553 mm bore diameter, a 2908 mm outer diameter, and a 137 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.
2787/2553 - Four-Point Contact Ball Slewing Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 2787/2553 |
| Brand | CHG® |
| Gear Type | Internal Gear |
| Characteristics | |
| Bearing Type | Single-row Four-point Contact Ball Slewing Bearing |
| Row Configuration | Single-row |
| Dimensions | |
| Bore Diameter (d) | 2553 mm |
| Width (B) | 137 mm |
| Outer Diameter (D) | 2908 mm |
| Number of Lubrication Holes n1 | 15 |
| Mounting Dimensions | |
| Outer Ring Mounting Hole P.C.D. D1 | 2830 mm |
| Inner Ring Mounting Hole P.C.D. D2 | 2615 mm |
| Lubrication Port Thread / Size Φ1 | 10 |
| Inner Ring Mounting Hole Count n2 | 90 |
| Inner Ring Mounting Hole Specification Φ2 (Ø / Thread) | 27 |
| Outer Ring Mounting Hole Count n3 | 90 |
| Outer Ring Mounting Hole Specification Φ3 (Ø / Thread) | 30 |
| Gear Data | |
| Gear Module m | 18 mm |
| Gear Tip Diameter De | 2469.6 mm |
| Number of Gear Teeth z | 138 |
| Gear Face Width b | 120 mm |
| Addendum Modification Coefficient x | 0.5 |
| Reference Data | |
| Reference Mass (kg) | 1478 kg |
2787/2553 2908 mm 2553 mm 2830 mm 2615 mm 137 mm Frequently Asked Questions about 2787/2553 Four-Point Contact Ball Slewing Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
For international ocean and air freight, CHG Bearing packs 2787/2553 with industrial VCI anti-corrosion barrier wrapping, sealed polybags, individual cartons, and fumigated ocean-worthy wooden crates. This multi-layer barrier guarantees rust-free storage for a minimum shelf life of 24 to 36 months.
In its sealed configuration (Open Type), CHG Bearing pre-charges 2787/2553 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.
As standard production, CHG Bearing subjects 2787/2553 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.
Model 2787/2553 is manufactured by CHG Bearing in standard Normal clearance (CN) for ambient temperature transmission, and C3 or C4 clearance for heavy duty applications. C3 clearance compensates for radial shrinkage caused by tight shaft press-fits (bore 2553 mm) and steep thermal gradients between inner and outer rings.
