71909 CDTP/P4B
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71909 CDTP/P4B
Basic Information
System of measurement
Metric
Weight
0.13 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
45 mm
Bore diameter tolerance
-0.006mm to 0
Outside diameter
68 mm
Outside diameter tolerance
-0.007mm to 0
Width
12 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
23
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
2925 lbf
Radial static load rating
2138 lbf
Limiting speed
19 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 353.53
/ each
In Stock
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71909 CDTP/P4B Bearing Product Overview & Core Advantages
The 71909 CDTP/P4B is a single-row angular contact ball bearing designed for applications requiring exceptional precision and high-speed performance. This P4 (ABEC-7) tolerance class bearing delivers superior rotational accuracy and is preloaded for enhanced system rigidity. Its key advantage lies in its ability to efficiently support combined loads—handling significant radial loads alongside thrust loads in one direction. The phenolic cage and optimized internal geometry contribute to its high limiting speed of 19,000 rpm, making it an ideal choice for high-precision, high-reliability machinery.
71909 CDTP/P4B Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71909 | Basic bearing series and size designation (45mm bore, 68mm OD, 12mm width) |
| C | Specific internal design and 15° contact angle |
| DT | Matched set of two bearings in a tandem arrangement |
| P | Preload class designation |
| P4B | High precision tolerance class (equivalent to ABEC-7) |
71909 CDTP/P4B Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: Manufactured to P4 tolerance class with a 15° contact angle and applied preload, this bearing provides exceptional system stiffness and minimal runout, crucial for precision applications.
- Superior Load Capacity: The optimized internal geometry, featuring a 6.35 mm ball diameter and 23 ballsdynamic and static load ratings (2925 lbf / 2138 lbf) for reliable performance under demanding combined loads.
- High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the open design and factory lubrication allow for a high limiting speed of 19,000 rpm.
- Durable Construction: Components made from chrome steel ensure high wear resistance and long service life within a wide operating temperature range of -30°C to 110°C.
71909 CDTP/P4B Bearing Typical Application Areas
This high-precision angular contact bearing is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: Where high rigidity and accurate shaft positioning are required.
- High-Frequency Motors and Spindles: Applications demanding minimal vibration at extreme rotational speeds.
- Medical and Laboratory Equipment: Centrifuges and other high-speed precision instruments.
