71920 FE/HCPA9ADGA
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71920 FE/HCPA9ADGA
Basic Information
System of measurement
Metric
Weight
1.3 kg
Tolerance class
PA9A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
100 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
140 mm
Outside diameter tolerance
-0.004mm to 0
Width
40 mm
Width tolerance
-0.2mm to 0
Contact angle
18 °
Ball & Washer Dimensions
Ball diameter
12.7 mm
Ball quantity
24
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
14040 lbf
Radial static load rating
13950 lbf
Limiting speed
16 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
Price available upon request.
Our sales team will respond within 24 hours with a competitive quote tailored to your requirements.
REQUEST A QUOTE
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71920 FE/HCPA9ADGA Bearing Product Overview & Core Advantages
The 71920 FE/HCPA9ADGA is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and reliability. This universal matchable (SU) bearing is designed to accommodate combined loads (radial and axial) simultaneously. Its extra light preload (Class A) and PA9A tolerance class ensure smooth, precise operation with minimal runout. The combination of a ceramic ball material and phenolic cage contributes to superior high-speed performance and reduced weight, making it ideal for high-velocity spindles and precision machinery.
71920 FE/HCPA9ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| FE | Steel machined window-type cage, pressed and centred on outer ring |
| HC | Hybrid Ceramic: Ceramic balls (Si3N4) with steel rings |
| PA9A | High precision tolerance class (equivalent to ABEC 9 / P4) |
| DGA | Universal matchable bearing design (can be mounted in any combination) |
71920 FE/HCPA9ADGA Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The use of ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and extends service life, especially in high-speed applications.
- Precision Engineering: Manufactured to PA9A tolerance class with an extra light preload, this bearing delivers exceptional running accuracy, minimal vibration, and high positional stability.
- Optimized Cage Design: The phenolic cage (FE) offers excellent strength-to-weight ratio, low friction, and is suitable for high rotational speeds, contributing to the bearing's limiting speed of 16,000 rpm.
- Universal Matchability (SU): As a universal matchable bearing, it can be paired with another identical bearing in any configuration (back-to-back, face-to-face, or tandem) without pre-selection, simplifying installation and inventory management.
- High Load Capacity: With a dynamic load rating of 14,040 lbf and static load rating of 13,950 lbf, it provides reliable performance under significant combined radial and axial loads.
71920 FE/HCPA9ADGA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC lathes.
- Precision Instrumentation: Measuring devices, optical scanners, and coordinate measuring machines (CMM).
- High-Frequency Motors: Spindles for PCB drilling, dental handpieces, and small precision motors.
- Aerospace & Defense: Gyroscopes, navigation systems, and auxiliary power units (APUs).
- Medical Equipment: High-speed dental drills and surgical hand tools.
