Manufactured by CHG Bearing, the 618/630P4 is a precision Deep Groove Ball Bearings（618 / 619 SERIES）. Key dimensional parameters include a 630 mm bore diameter, a 780 mm outer diameter, and a 69 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.
618/630P4 - Deep Groove Ball Bearings（618 / 619 SERIES）
Technical Specifications
| Overview | |
|---|---|
| Part Number | 618/630P4 |
| Brand | CHG® |
| Characteristics | |
| Bearing Type | Deep Groove Ball Bearing |
| Seal Type | Open / Contact Seal Options |
| Load Direction | Radial |
| Row Configuration | Single Row |
| Dimensions | |
| Bore Diameter (d) | 630 mm |
| Width (B) | 69 mm |
| Outer Diameter (D) | 780 mm |
| Bore Diameter Tolerance | / mm |
| Outside Diameter Tolerance | / mm |
| Width Tolerance | / mm |
| Performance | |
| Basic Dynamic Radial Load Rating Cr (kN) | 420 kN |
| Basic Static Radial Load Rating C0r (kN) | 890 kN |
| Limiting Speed – Grease (r/min) | 630 r/min |
| Limiting Speed – Oil (r/min) | 750 (r/min) |
| Material | |
| Mass (kg) | 71.3 kg |
| Ring Material | Stainless Steel / Bearing Steel |
| Cage Material | Brass / PEEK / Polyimide / Phenolic Resin Fabric Laminate |
| Ball Material | Stainless Steel / Bearing Steel / Ceramic |
| Operating Temperature Range (°C) | -50 to +100 °C |
| Precision Class | P4 |
| Radial Internal Clearance | 0.09-0.230 mm |
618/630P4 780 mm 630 mm 69 mm Frequently Asked Questions about 618/630P4 Deep Groove Ball Bearings（618 / 619 SERIES）
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
To safeguard CHG Bearing 618/630P4 against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (630 mm x 780 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
As standard production, CHG Bearing subjects 618/630P4 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.
In its sealed configuration (Open / Contact Seal Options), CHG Bearing pre-charges 618/630P4 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.
For international ocean and air freight, CHG Bearing packs 618/630P4 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.
