7205 ACD/P4ATBTD
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
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7205 ACD/P4ATBTD Bearing Product Overview & Core Advantages
The 7205 ACD/P4ATBTD is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This triplex matched set in a back-to-back (TBT) configuration delivers superior stiffness and stability under combined loads (radial and axial). Manufactured to P4A tolerance class with a heavy preload (Class D), it is engineered for high-precision, high-reliability machinery where minimal runout and precise rotational accuracy are critical.
7205 ACD/P4ATBTD Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7205 | Basic bearing series, 35mm bore, 72mm OD, 17mm width (single bearing) |
| AC | Angular Contact design with 25° contact angle |
| D | Heavy Preload (Class D) for maximum rigidity |
| /P4A | High Precision Tolerance Class (exceeding ABEC 7) |
| TBT | Triplex Back-to-Back arrangement (3 bearings matched set) |
| Open | No seals/shields for high-speed applications |
7205 ACD/P4ATBTD Bearing Structural Features & Performance Benefits
Optimized Rigidity: The triplex back-to-back configuration creates an extremely rigid bearing system that effectively resists moment loads and shaft deflection, making it ideal for precision spindles.
Superior Load Capacity: With a 25° contact angle and heavy preload, this bearing set handles significant combined radial and axial loads in both directions simultaneously.
High-Speed Capability: The phenolic resin cage provides excellent strength-to-weight ratio and operates effectively at the limiting speed of 71,500 rpm, while the open design minimizes friction and heat generation.
Precision Performance: Manufactured to P4A tolerance standards with bore and OD tolerances of -0.004mm to 0, ensuring minimal runout and vibration for ultra-precise applications.
Premium Materials: Constructed from chrome steel rings and balls with 13 precision-ground balls per bearing, delivering consistent performance and long service life.
7205 ACD/P4ATBTD Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers
- High-Speed Machining Centers: Where rigidity and accuracy are paramount
- Precision Gearboxes: Industrial transmission systems requiring minimal backlash
- Robotic Systems: High-accuracy robotic arms and positioning systems
- Aerospace Components: Flight control systems and auxiliary power units
- Medical Equipment: High-speed dental handpieces and surgical tools
