Manufactured by CHG Bearing, the 61888 is a precision Deep Groove Ball Bearings（618 / 619 SERIES）. Key dimensional parameters include a 440 mm bore diameter, a 540 mm outer diameter, and a 46 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.
61888 - Deep Groove Ball Bearings（618 / 619 SERIES）
Technical Specifications
| Overview | |
|---|---|
| Part Number | 61888 |
| 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) | 440 mm |
| Width (B) | 46 mm |
| Outer Diameter (D) | 540 mm |
| Bore Diameter Tolerance | -0.045-0 mm |
| Outside Diameter Tolerance | -0.05-0 mm |
| Width Tolerance | -0.45-0 mm |
| Performance | |
| Basic Dynamic Radial Load Rating Cr (kN) | 249 kN |
| Basic Static Radial Load Rating C0r (kN) | 425 kN |
| Limiting Speed – Grease (r/min) | 900 r/min |
| Limiting Speed – Oil (r/min) | 1100 (r/min) |
| Material | |
| Mass (kg) | 22.3 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 | P0 |
| Radial Internal Clearance | 0.065-0.170 mm |
61888 540 mm 440 mm 46 mm Frequently Asked Questions about 61888 Deep Groove Ball Bearings（618 / 619 SERIES）
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Each 61888 produced in CHG Bearing manufacturing facilities features accurately profiled corner chamfers complying with DIN 5412 / ISO standard corner radii. When designing mating shafts and housing shoulders, machining an undercut or fillet radius strictly within the inner ring clearance limit (440 mm bore side) ensures perfect planar contact without edge binding.
The Open / Contact Seal Options engineered for 61888 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.
Following standard ISO 281 fatigue calculation guidelines, the nominal rating life (L10) of CHG Bearing 61888 correlates its dynamic capacity (standard dynamic) with equivalent dynamic loads. In controlled industrial settings with proper contamination-free filtration, field data confirms continuous operational longevity exceeding 20,000 to 50,000 service hours.
In its sealed configuration (Open / Contact Seal Options), CHG Bearing pre-charges 61888 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.
