Manufactured by CHG Bearing, the 1797/1278G2 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.
1797/1278G2 - Crossed Roller Slewing Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 1797/1278G2 |
| 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 | 105 mm |
| End-face Height Difference h | 15 mm |
| Number of Lubrication Holes n1 | 4 |
| 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 | 1655.46 mm |
| Number of Gear Teeth z | 134 |
| Gear Face Width b | 90 mm |
| Addendum Modification Coefficient x | 1.15 |
| Reference Data | |
| Reference Mass (kg) | 597 kg |
1797/1278G2 1595 mm 1278 mm 120 mm 1535 mm 1335 mm Frequently Asked Questions about 1797/1278G2 Crossed Roller Slewing Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Standard batches of CHG Bearing 1797/1278G2 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.
As a primary manufacturer, CHG Bearing supports both trial batch evaluations and container-load supply for 1797/1278G2. Standard catalog sizes are stocked for rapid 3–7 day dispatch, while high-volume OEM production runs typically dispatch within 30–45 days.
In its sealed configuration (Open Type), CHG Bearing pre-charges 1797/1278G2 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.
To extend the trouble-free lifespan of CHG Bearing 1797/1278G2, preventive maintenance routines should monitor operating housing temperature (normally maintaining below 70°C) and conduct regular vibration FFT analysis to identify early raceway micro-pitting before unexpected line halts occur.
