71915 ACD/P4ADGA
71900 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
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71915 ACD/P4ADGA Bearing Product Overview & Core Advantages
The 71915 ACD/P4ADGA is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a universal matchable (SU) bearing supplied in a pre-lubricated set of two, it enables simplified mounting in back-to-back (DB) or face-to-face (DF) arrangements to handle combined radial and axial loads from both directions. Its P4A tolerance class and extra light preload (Class A) ensure smooth, quiet operation at high speeds, making it an ideal solution for high-performance spindles and precision machinery.
71915 ACD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
- 71915: Basic designation indicating 75mm bore, 105mm OD, 32mm width
- AC: Angular Contact design with a 25° contact angle
- D: High ball complement design for increased load capacity
- P4A: Super-precision tolerance class with specific running accuracy requirements
- DGA: Universal matchable bearing set, pre-lubricated and ready for mounting
71915 ACD/P4ADGA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The angular contact design with 25° contact angle and high ball complement (26 balls) provides superior stiffness and enables the bearing to handle significant combined radial and axial loads. The universal matching capability allows for precise preload adjustment when mounted in pairs.
Super-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 applications requiring extreme rotational accuracy.
High-Speed Capability: The phenolic cage provides excellent strength-to-weight ratio and operates effectively at the limiting speed of 22,000 rpm, while the pre-applied lubrication ensures reliable performance throughout the operating temperature range of -30°C to 110°C.
Optimized Design: With chrome steel construction throughout (rings and balls) and precision-ground raceways, this bearing delivers long service life and consistent performance under demanding conditions.
71915 ACD/P4ADGA Bearing Typical Application Areas
- Machine tool spindles for milling, grinding, and turning centers
- High-speed machining centers requiring superior accuracy
- Precision rotary tables and indexing heads
- Industrial pumps and compressors with high rotational demands
- Aerospace positioning systems and navigation instruments
- Medical equipment spindles for dental and surgical tools
