71911 CDTP/HCP4B
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71911 CDTP/HCP4B
Basic Information
System of measurement
Metric
Weight
0.15 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
55 mm
Bore diameter tolerance
-0.007mm to 0
Outside diameter
80 mm
Outside diameter tolerance
-0.007mm to 0
Width
13 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
23
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
4388 lbf
Radial static load rating
3285 lbf
Limiting speed
19 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 478.4
/ each
In Stock
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71911 CDTP/HCP4B Bearing Product Overview & Core Advantages
The 71911 CDTP/HCP4B is a single-row angular contact ball bearing engineered for applications demanding exceptional precision and high-speed performance. Positioned in the P4 (ABEC-7) tolerance class, it guarantees superior running accuracy. A key feature is its preload availability, which eliminates internal clearance to ensure high system rigidity, precise shaft positioning, and reduced noise and vibration. The combination of a ceramic ball material and a phenolic cage enables outstanding performance at high rotational speeds while managing combined radial and axial loads efficiently.
71911 CDTP/HCP4B Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| 71911 | Basic bearing designation indicating a high-precision, single-row angular contact ball bearing with a 55mm bore, 80mm OD, and 13mm width. |
| C | Specifies a 15° contact angle, optimized for high-speed applications requiring high rigidity. |
| DTP | Indicates a duplex (paired) arrangement with a specific preload. This configuration provides enhanced stiffness and precise axial displacement control. |
| HC | Refers to the hybrid ceramic construction, featuring steel rings and ceramic balls for reduced weight, lower friction, and higher limiting speed. |
| P4 | Denotes the P4 tolerance class (equivalent to ABEC-7), ensuring extremely tight dimensional and running accuracy for precision machinery. |
| B | Indicates a 40° contact angle variant. (Note: The provided specification lists a 15° angle, confirming the "C" designation is primary). |
71911 CDTP/HCP4B Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The preloaded duplex arrangement (DTP) and P4 tolerance class work in unison to deliver maximum system stiffness and exceptional running accuracy, critical for applications sensitive to deflection.
- Superior High-Speed Capability: The hybrid ceramic design (HC) with lightweight silicon nitride (Si3N4) balls and a phenolic resin cage significantly reduces centrifugal forces, enabling a high limiting speed of 19,000 rpm.
- Optimized Load Capacity: The 15° contact angle is ideal for supporting combined loads, with a high thrust capacity relative to radial load. The dynamic load rating of 4388 lbf and static load rating of 3285 lbf ensure reliable performance under demanding conditions.
- Extended Service Life: Ceramic balls offer superior wear resistance, lower thermal expansion, and electrical insulation properties, contributing to longer bearing life and consistent performance across a temperature range of -30°C to 110°C.
71911 CDTP/HCP4B Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Robotics (Articulated arm joints, high-accuracy actuators)
- Aerospace & Defense Systems (Gyroscopes, radar positioning systems)
- High-Frequency Motors and Spindles
- Medical Equipment (Dental handpieces, laboratory centrifuges)
