Super Precision Angular Contact Ball Bearings 71809 CD/P4DGA

The 71809 CD/P4DGA is a super precision angular contact ball bearing with a 45mm bore and 58mm outer diameter, crafted from high-quality chrome steel. It features a 15° contact angle and is designed for angular contact loads, handling up to 1784 lbf dynamically.
Its open design and phenolic cage ensure smooth operation at speeds up to 46,000 RPM, while the extra light preload enhances precision. The bearing operates efficiently in temperatures ranging from -30°C to 110°C.
This model is part of a universal matching set, allowing flexible arrangements like back-to-back or face-to-face. Ideal for high-precision applications such as machine tools or spindle drives.
Weighing just 0.078kg, it’s lightweight yet robust, and interchangeable with SKF bearings for easy replacements. Compliant with P4 tolerance class for exceptional accuracy.

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Description

Features

Application

Q&A

Product Parameters

Part Number 71809 CD/P4DGA
Brand TFL
Interchangeable SKF
Bore Dia 45 mm
Bore Dia Tolerance -0.004mm to 0
Outer Dia 58 mm
Outer Dia Tolerance -0.004mm to 0
Width 14 mm
Width Tolerance -0.2mm to 0
Ball Dia 3.175 mm
Ball Qty 31
Contact Angle 15°
Tolerance Class P4
System of Measurement Metric
Seal Type Open
Matched Arrangement Universal matching
Number Of Bearings In Matched Set 2
Universal Matching Bearing Yes, back-to-back (<>), face-to-face (><) or tandem (>>)
Preload Extra light / Class A
For Load Direction Angular Contact
Ring Material Chrome Steel
Ball Material Chrome Steel
Cage Material Phenolic
Dynamic Radial Load 1784 lbf
Static Radial Load 2385 lbf
Lubrication Lubricated
Temperature Range - 30°C to 110 °C
Max Speed 46000 rpm
Weight 0.078 kg
Price（$） 147.555

Super Precision Angular Contact Ball Bearings 71809 CD/P4DGA dimension drawing

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Features

How Does 71809 CD/P4DGA Bearing Achieve Super Precision?

71809 CD/P4DGA Bearing features a 15° contact angle, optimised for high-precision angular contact applications.
Its chrome steel rings and balls ensure durability, while the phenolic cage reduces friction for smoother operation.

With a dynamic radial load capacity of 1784 lbf, it handles demanding tasks with ease.
The P4 tolerance class guarantees exceptional accuracy, making it ideal for precision machinery.

Universal matching allows flexible arrangement options, including back-to-back or face-to-face setups.
Its maximum speed of 46,000 rpm ensures reliable performance in high-speed applications.

The extra light preload (Class A) minimises vibration, enhancing operational stability.
Lubrication is pre-applied, reducing initial setup time and maintenance needs.

Application

Key Fields for 71809 CD/P4DGA Bearing
71809 CD/P4DGA Bearing is commonly used in high-precision machine tools, where its angular contact design ensures accurate spindle rotation. The universal matching feature allows for flexible arrangements, making it suitable for complex setups.

In robotics, 71809 CD/P4DGA Bearing supports articulated arms, providing smooth motion and low friction. Its phenolic cage material helps reduce weight while maintaining durability in repetitive movements.

For medical imaging devices, 71809 CD/P4DGA Bearing’s P4 tolerance class ensures minimal vibration and noise. The chrome steel construction offers reliable performance in sensitive environments where precision is critical.

Automotive applications like electric vehicle motors benefit from 71809 CD/P4DGA Bearing’s high-speed capability. The extra light preload ensures efficient power transmission with minimal energy loss.

In aerospace systems, 71809 CD/P4DGA Bearing’s temperature stability makes it ideal for avionics and control mechanisms. Its matched set configuration simplifies installation and maintenance in tight spaces.