Manufactured by CHG Bearing, the 71821 ACD/P4 is a precision Super-precision Angular Contact Ball Bearings. Key dimensional parameters include a 105 mm bore diameter, a 130 mm outer diameter, and a 13 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.
71821 ACD/P4 - Super-precision Angular Contact Ball Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 71821 ACD/P4 |
| 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 | No |
| Axial Clearance / Preload | Not Applicable |
| Tolerance Class | P4 |
| Bearing Material | Bearing Steel |
| Sealing | Open |
| Dimensions | |
| Bore Diameter (d) | 105 mm |
| Width (B) | 13 mm |
| Outer Diameter (D) | 130 mm |
| Contact Angle α (°) | 25 ° |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 21.6 kN |
| Basic Static Load Rating C₀ (kN) | 28.5 kN |
| Limiting Speed – Grease (r/min) | 8000 r/min |
| Limiting Speed – Oil-air (r/min) | 12000 r/min |
| Material | |
| Weight (kg) | 0.32 kg |
71821 ACD/P4 130 mm 105 mm 13 mm Frequently Asked Questions about 71821 ACD/P4 Super-precision Angular Contact Ball Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Following standard ISO 281 fatigue calculation guidelines, the nominal rating life (L10) of CHG Bearing 71821 ACD/P4 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 a primary manufacturer, CHG Bearing supports both trial batch evaluations and container-load supply for 71821 ACD/P4. Standard catalog sizes are stocked for rapid 3–7 day dispatch, while high-volume OEM production runs typically dispatch within 30–45 days.
For international ocean and air freight, CHG Bearing packs 71821 ACD/P4 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.
The CHG Bearing 71821 ACD/P4 is rated for limiting speeds up to standard rated RPM under forced oil-mist or circulating oil lubrication regimes. When lubricated with factory-filled synthetic high-speed grease, safe continuous velocity is maintained at approximately 75% to 85% of the maximum nominal limit, preventing thermal runaway.
