71807 CD/P4TBTL
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71807 CD/P4TBTL
Basic Information
System of measurement
Metric
Weight
0.084 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
35 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
47 mm
Outside diameter tolerance
-0.004mm to 0
Width
21 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
26
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2239 lbf
Radial static load rating
2902 lbf
Limiting speed
56 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
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
In Stock
Price available upon request.
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71807 CD/P4TBTL Bearing Product Overview & Core Advantages
The 71807 CD/P4TBTL is a precision angular contact ball bearing designed for high-performance applications requiring exceptional rigidity and accuracy. This bearing is supplied as a matched triplex set in a back-to-back (TBT) arrangement, enabling it to withstand significant combined loads (radial and axial) while providing high system stability. Manufactured to P4 tolerance class, it guarantees superior running accuracy and is preloaded for immediate, precise operation. Its compact design, featuring a 35 mm bore, makes it ideal for high-speed spindles and other demanding machinery.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71807 | Basic bearing series and size designation (35mm bore, 47mm OD). |
| CD | Specifies a 15° contact angle, optimized for high-speed operation and radial load capacity. |
| P4 | Indicates a high-precision tolerance class for superior running accuracy and minimal vibration. |
| TBT | Denotes a Triplex Back-to-Back matched set arrangement, providing high rigidity and moment load capacity. |
| L | Signifies that the bearing is lubricated from the factory for immediate use. |
71807 CD/P4TBTL Bearing Structural Features & Performance Benefits
- High Rigidity & System Stability: The triplex back-to-back (TBT) arrangement creates a highly rigid bearing system that effectively resists moment loads and shaft deflection, ensuring precise positioning and smooth operation under heavy combined loads.
- Superior Precision: Manufactured to P4 tolerance class with tight dimensional control on bore, outside diameter, and width, this bearing minimizes runout and vibration for applications demanding extreme accuracy.
- Optimized High-Speed Performance: The 15° contact angle and lightweight phenolic cage reduce centrifugal forces and friction, enabling a high limiting speed of 56,000 rpm. The open design facilitates efficient lubrication and heat dissipation.
- Preload & Ready-to-Install: The set is supplied with a preload applied, eliminating the need for complex adjustment during installation and ensuring immediate high-performance operation.
- Durable Construction: Made from chrome steel for both rings and balls, the bearing offers high fatigue life and wear resistance, suitable for a wide temperature range from -30°C to 110°C.
71807 CD/P4TBTL Bearing Typical Application Areas
This bearing is engineered for high-end applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Drives: Servo motors, high-frequency spindles.
- Aerospace & Defense Systems: Gyroscopes, navigation instruments.
- Medical Equipment: High-speed dental handpieces, laboratory centrifuges.
- Robotics: Precision joints and arm assemblies requiring high moment stiffness.
