Manufactured by CHG Bearing, the 2797/1278G2 is a precision Crossed Roller Slewing Bearings. Key dimensional parameters include a 1278 mm bore diameter, a 1595 mm outer diameter, and a 120 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.
2797/1278G2 - Crossed Roller Slewing Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 2797/1278G2 |
| Brand | CHG® |
| Gear Type | External Gear |
| Characteristics | |
| Bearing Type | Single-row Crossed Roller Slewing Bearing |
| Row Configuration | Single-row |
| Dimensions | |
| Bore Diameter (d) | 1278 mm |
| Width (B) | 120 mm |
| Outer Diameter (D) | 1595 mm |
| Inner/Outer Ring Height H1 | 106 mm |
| End-face Height Difference h | 14 mm |
| Number of Lubrication Holes n1 | 6 |
| Mounting Dimensions | |
| Outer Ring Mounting Hole P.C.D. D1 | 1535 mm |
| Inner Ring Mounting Hole P.C.D. D2 | 1335 mm |
| Lubrication Port Thread / Size Φ1 | 10 |
| Inner Ring Mounting Hole Count n2 | 36 |
| Inner Ring Mounting Hole Specification Φ2 (Ø / Thread) | 26 |
| Outer Ring Mounting Hole Count n3 | 36 |
| Outer Ring Mounting Hole Specification Φ3 (Ø / Thread) | 26 |
| Gear Data | |
| Gear Module m | 12 mm |
| Gear Tip Diameter De | 1221.14 mm |
| Number of Gear Teeth z | 103 |
| Gear Face Width b | 90 mm |
| Addendum Modification Coefficient x | 0.35 |
| Reference Data | |
| Reference Mass (kg) | 585 kg |
2797/1278G2 1595 mm 1278 mm 120 mm 1535 mm 1335 mm Frequently Asked Questions about 2797/1278G2 Crossed Roller Slewing Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Quality starts with raw material selection: CHG Bearing crafts 2797/1278G2 inner and outer rings from high-purity High-Quality Chrome Steel (GCr15/100Cr6). Our raw billets undergo vacuum degassing and secondary ESR (electroslag remelting) processes to drastically eliminate non-metallic sulfide and oxide inclusions, elevating subsurface contact fatigue resistance.
Model 2797/1278G2 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 1278 mm) and steep thermal gradients between inner and outer rings.
As standard production, CHG Bearing subjects 2797/1278G2 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 match diverse operational dynamics, CHG Bearing supplies 2797/1278G2 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.
