7017 ACD/P4ADBCGMM
7000 Series Super Precision Angular Contact Ball Bearings
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7017 ACD/P4ADBCGMM Bearing Product Overview & Core Advantages
The 7017 ACD/P4ADBCGMM is a precision duplex pair of angular contact ball bearings designed for applications demanding exceptional rigidity and running accuracy. This back-to-back (DB) arrangement is preloaded to provide Moderate (Class C) preload, enabling the bearing set to withstand significant combined loads (radial and axial loads from both directions) simultaneously. Manufactured to the exacting P4A tolerance class, it is an ideal solution for high-speed, high-precision spindles and machinery requiring superior rotational stability and long-term reliability.
7017 ACD/P4ADBCGMM Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7017 | Basic bearing series and size designation (85mm bore, 130mm OD, 44mm width). |
| AC | Angular Contact ball bearing with a 25° contact angle. |
| D | Signifies a Duplex pair of bearings. |
| P4A | Indicates a high-precision tolerance class (superior to ABEC 7), ensuring minimal runout and vibration. |
| DB | Specifies the Back-to-Back mounting arrangement, which provides high moment rigidity. |
| CG | Indicates a Moderate (Class C) preload applied to the matched set. |
| MM | Specifies the bearing ring material and cage material: Chrome Steel rings with a Phenolic (resin) cage. |
7017 ACD/P4ADBCGMM Bearing Structural Features & Performance Benefits
High Rigidity & Moment Load Capacity: The back-to-back (DB) duplex arrangement creates a wide effective spread, significantly increasing the system's resistance to moment loads and providing exceptional operational stiffness. This is critical for maintaining precision under heavy combined loads.
Optimized for High-Speed Operation: The lightweight phenolic cage reduces centrifugal forces, while the 25° contact angle offers an excellent balance between radial and axial load capacity, contributing to a high limiting speed of 17,000 rpm.
Precision & Reliability: Manufactured to P4A tolerance class with a bore and outside diameter tolerance of -0.004mm to 0, this bearing ensures minimal runout and consistent, predictable performance in the most demanding precision applications.
Robust Load Ratings: With a dynamic load rating of 23,400 lbf and a static load rating of 27,450 lbf, this bearing set is engineered for long service life under challenging operating conditions.
7017 ACD/P4ADBCGMM Bearing Typical Application Areas
The 7017 ACD/P4ADBCGMM is ideally suited for high-performance machinery where accuracy, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles (e.g., CNC milling, grinding, and turning centers)
- High-Frequency Motors and Precision Spindles
- Industrial Pumps and Compressors
- Robotic Drives and Rotary Tables
- Other precision equipment requiring duplex bearing configurations for enhanced stability.
