7009 CD/P4ATBTB
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7009 CD/P4ATBTB
Basic Information
System of measurement
Metric
Weight
0.71 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
45 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
75 mm
Outside diameter tolerance
-0.004mm to 0
Width
48 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
9.525 mm
Ball quantity
17
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
14040 lbf
Radial static load rating
15075 lbf
Limiting speed
46 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Triplex Back-to-Back (TBT)
Number of bearings in matched set
3
Universal matching bearing
No (Standard)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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7009 CD/P4ATBTB Bearing Product Overview & Core Advantages
The 7009 CD/P4ATBTB is a precision angular contact ball bearing configured in a triplex back-to-back (TBT) matched set. Engineered for applications demanding exceptional rotational accuracy and rigidity, this pre-assembled set of three bearings is preloaded to Light / Class B specifications. Its primary advantage lies in its ability to handle combined loads (radial and axial) simultaneously with high stability, making it an ideal solution for high-speed and high-precision spindle systems. The P4A tolerance class ensures superior running accuracy for critical machinery.
7009 CD/P4ATBTB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7009 | Basic bearing series and size designation (45mm bore, 75mm OD). |
| CD | Specific internal design and contact angle (15° in this case). |
| P4A | Indicates a high-precision tolerance class, exceeding normal P4 standards for enhanced running accuracy. |
| TBT | Denotes the Triplex Back-to-Back matched arrangement of three bearings. |
7009 CD/P4ATBTB Bearing Structural Features & Performance Benefits
- Exceptional Rigidity and Stability: The triplex back-to-back (TBT) arrangement creates a highly rigid bearing system that effectively resists moment loads and shaft deflection, crucial for maintaining precision under heavy combined loads.
- Optimized for High-Speed Operation: The phenolic cage is lightweight and robust, contributing to lower centrifugal forces and stable operation at the high limiting speed of 46,000 rpm. The 15° contact angle provides an excellent balance between radial and axial load capacity for high-speed applications.
- Superior Precision: Manufactured to P4A tolerance class with tight dimensional tolerances on bore, outside diameter, and width, ensuring minimal runout and vibration for ultra-precise positioning.
- High Load Capacity: Constructed from chrome steel for both rings and balls, the bearing delivers high dynamic and static load ratings (14,040 lbf and 15,075 lbf respectively), ensuring long service life under demanding conditions.
- Pre-Lubricated & Ready for Use: The bearing comes lubricated from the factory, simplifying installation and providing immediate operational readiness within its specified temperature range.
7009 CD/P4ATBTB Bearing Typical Application Areas
This precision bearing set is specifically designed for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling machines, precision engraving equipment.
- High-Frequency Motors: Spindles for routers and other high-RPM machinery.
- Medical Equipment: High-speed dental handpieces and laboratory centrifuges.
