7207 ACD/P4ADBC
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7207 ACD/P4ADBC Bearing Product Overview & Core Advantages
The 7207 ACD/P4ADBC is a duplex back-to-back angular contact ball bearing designed for applications requiring exceptional precision and rigidity. This P4A tolerance class bearing is pre-lubricated and features a moderate preload (Class C), making it ideal for machine tool spindles and other high-precision machinery where superior running accuracy and high rigidity are critical. Its duplex back-to-back configuration enables it to withstand combined loads (significant radial and bidirectional axial loads) simultaneously, ensuring stable performance in demanding operational conditions.
7207 ACD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7207 | Basic bearing series, indicating a 35mm bore, 72mm OD, and 34mm width. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Duplex (Two single bearings supplied as a matched set). |
| DB | Back-to-Back arrangement of the duplex pair. |
| P4A | High precision tolerance class (superior to ABEC 7). |
| C | Moderate preload level. |
7207 ACD/P4ADBC Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads. This configuration, combined with the 25° contact angle, provides excellent capability for handling combined radial and axial loads from both directions.
Precision Performance: Manufactured to P4A tolerance class with tight dimensional control (bore/OD tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration for superior operational accuracy.
Optimized Internal Design: The bearing incorporates 13 high-precision chrome steel balls with a diameter of 11.112mm and a phenolic cage, which contributes to lower friction, reduced weight, and smooth operation at high speeds.
Ready-to-Install: The bearing is pre-lubricated and comes with a moderate preload applied, simplifying installation and ensuring immediate optimal performance without additional adjustments.
7207 ACD/P4ADBC Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC milling machines
- Precision Rotary Systems: Industrial robots, rotary tables, and indexing heads
- High-Speed Drives: Main spindles in textile machinery and printing equipment
- Medical Equipment: High-speed dental handpieces and medical scanners
- Test and Measurement Equipment: Precision instruments requiring minimal vibration and high running accuracy
