Manufactured by CHG Bearing, the 71918 ACDGA/HCP4A is a precision Super-precision Angular Contact Ball Bearings. Key dimensional parameters include a 90 mm bore diameter, a 125 mm outer diameter, and a 18 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.
71918 ACDGA/HCP4A - Super-precision Angular Contact Ball Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 71918 ACDGA/HCP4A |
| Brand | CHG® |
| Characteristics | |
| Bearing Type | Super-precision Angular Contact Ball Bearing |
| Number of Rows | 1 |
| Contact Type | Normal Contact (Two-point Contact) |
| Ring Type | Integral Inner and Outer Rings |
| Design | High-capacity D Design |
| Universally Matchable | Yes – Back-to-back (DB), Face-to-face (DF), or Tandem (DT) |
| Axial Clearance / Preload | Preload Class A |
| Tolerance Class | P4A |
| Bearing Material | Hybrid (Steel Rings / Ceramic Balls) |
| Sealing | Open |
| Dimensions | |
| Bore Diameter (d) | 90 mm |
| Width (B) | 18 mm |
| Outer Diameter (D) | 125 mm |
| Contact Angle α (°) | 25 ° |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 44.2 kN |
| Basic Static Load Rating C₀ (kN) | 48 kN |
| Material | |
| Weight (kg) | 0.464 kg |
71918 ACDGA/HCP4A 125 mm 90 mm 18 mm Frequently Asked Questions about 71918 ACDGA/HCP4A Super-precision Angular Contact Ball Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
To match diverse operational dynamics, CHG Bearing supplies 71918 ACDGA/HCP4A 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.
Following standard ISO 281 fatigue calculation guidelines, the nominal rating life (L10) of CHG Bearing 71918 ACDGA/HCP4A 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.
As standard production, CHG Bearing subjects 71918 ACDGA/HCP4A 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 safeguard CHG Bearing 71918 ACDGA/HCP4A against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (90 mm x 125 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
