7215 ACD/P4ATBTB
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7215 ACD/P4ATBTB Bearing Product Overview & Core Advantages
The 7215 ACD/P4ATBTB represents a premium triplex matched bearing set engineered for demanding applications requiring exceptional precision and rigidity. This metric angular contact ball bearing configuration features three bearings arranged in a Back-to-Back (TBT) duplex pair with a third bearing, delivering superior moment rigidity and stability under combined loads. With a P4A super-precision tolerance and a light preload (Class B), it is specifically designed for high-speed spindles and machinery where uncompromising accuracy and high rigidity are paramount. The open design, lubricated with high-performance grease, ensures optimal performance within a defined temperature range.
7215 ACD/P4ATBTB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7215 | Basic bearing series; 75 mm bore, 130 mm OD, 75 mm width. |
| ACD | Angular Contact design with a 25° contact angle. |
| P4A | Indicates super-precision tolerance class, exceeding normal P4 standards for runout and dimensional accuracy. |
| TBT | Specifies the Triplex Back-to-Back matched arrangement of three bearings. |
7215 ACD/P4ATBTB Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The triplex back-to-back (TBT) arrangement provides exceptional resistance to moment loads and tilting, ensuring maximum system stiffness and positioning accuracy.
- Superior Load Capacity: The combination of three bearings significantly increases the radial dynamic load rating (33300 lbf) and static load rating (39600 lbf), making it ideal for heavy combined loads.
- Optimized High-Speed Performance: The phenolic cage and 25° contact angle are optimized for high-speed operation, supporting a limiting speed of 36,000 rpm.
- Precision Engineering: Manufactured to P4A tolerance class with tight bore, OD, and width tolerances, this set guarantees minimal runout and vibration for ultra-precise applications.
- Durable Material Construction: Components made from chrome steel for rings and balls ensure high durability and long service life under strenuous operating conditions.
