Manufactured by CHG Bearing, the 2787/2121 is a precision Four-Point Contact Ball Slewing Bearings. Key dimensional parameters include a 2121 mm bore diameter, a 2500 mm outer diameter, and a 169 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.
2787/2121 - Four-Point Contact Ball Slewing Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 2787/2121 |
| 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) | 2121 mm |
| Width (B) | 169 mm |
| Outer Diameter (D) | 2500 mm |
| Number of Lubrication Holes n1 | 9 |
| Mounting Dimensions | |
| Outer Ring Mounting Hole P.C.D. D1 | 2400 mm |
| Inner Ring Mounting Hole P.C.D. D2 | 2194 mm |
| Lubrication Port Thread / Size Φ1 | 12 |
| Inner Ring Mounting Hole Count n2 | 72 |
| Inner Ring Mounting Hole Specification Φ2 (Ø / Thread) | 30 |
| Outer Ring Mounting Hole Count n3 | 72 |
| Outer Ring Mounting Hole Specification Φ3 (Ø / Thread) | 30 |
| Gear Data | |
| Gear Module m | 18 mm |
| Gear Tip Diameter De | 2034.24 mm |
| Number of Gear Teeth z | 114 |
| Gear Face Width b | 150 mm |
| Addendum Modification Coefficient x | 0.5 |
| Reference Data | |
| Reference Mass (kg) | 1486 kg |
2787/2121 2500 mm 2121 mm 2400 mm 2194 mm 169 mm Frequently Asked Questions about 2787/2121 Four-Point Contact Ball Slewing Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
The Open Type engineered for 2787/2121 by CHG Bearing utilizes precision non-contact metal shields or reinforced NBR/FKM contact lip seals. This barrier prevents particulate ingress, washdown fluids, and abrasive dust from reaching the raceways while eliminating grease leakage under centrifugal forces.
As standard production, CHG Bearing subjects 2787/2121 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.
Yes, CHG Bearing works closely with industrial OEMs and brand distributors. We offer turnkey custom engineering for 2787/2121, including laser-etched customer logos, custom internal radial clearances, specialized grease formulations, and bespoke protective packaging.
To match diverse operational dynamics, CHG Bearing supplies 2787/2121 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.
