S71909 ACEGB/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71909 ACEGB/HCP4A
Basic Information
System of measurement
Metric
Weight
0.11 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
45 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
68 mm
Outside diameter tolerance
-0.004mm to 0
Width
12 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2194 lbf
Radial static load rating
1440 lbf
Limiting speed
41 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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In Stock
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S71909 ACEGB/HCP4A Bearing Product Overview & Core Advantages
The S71909 ACEGB/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered as a single bearing that is Universal Matchable (SU), it enables precise preload control when paired with a second identical bearing. Its P4A tolerance class ensures ultra-precise running accuracy, while the combination of a ceramic ball material and phenolic cage facilitates superior high-speed performance and thermal stability. This bearing is pre-lubricated with grease, making it ready for immediate installation and offering reliable operation.
S71909 ACEGB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number S71909 ACEGB/HCP4A is decoded as follows:
- S: Bearing with a stainless steel component (compatible with the ceramic balls).
- 7: Angular contact ball bearing.
- 19: High-speed design series.
- 09: Bore diameter code (45 mm).
- AC: 25-degree contact angle.
- E: Optimized internal design for high speed.
- GB: Light preload (Class B).
- /HCP4A: P4A tolerance class (higher than ABEC 7), indicating extremely tight dimensional and running accuracy tolerances.
S71909 ACEGB/HCP4A Bearing Structural Features & Performance Benefits
- High-Speed & Rigidity: The use of ceramic balls (Silicon Nitride) significantly reduces centrifugal forces and friction, enabling a high limiting speed of 41,000 rpm. The phenolic cage is lightweight and offers excellent dimensional stability under high rotational speeds and temperatures.
- Precision & Load Capacity: Manufactured to a P4A tolerance class, this bearing provides exceptional running accuracy and low noise. The 25-degree contact angle is optimized to handle combined radial and axial loads efficiently, with a dynamic load rating of 2194 lbf.
- Matched Set Versatility: As a Universal Matchable (SU) bearing, it can be universally paired with another bearing of the same type to form a matched arrangement, simplifying procurement and inventory while ensuring precise preload and performance.
- Sealed & Lubricated: The bearing is sealed and pre-lubricated with grease, protecting against contamination and providing long-term, maintenance-free operation within a temperature range of -30°C to 110°C.
S71909 ACEGB/HCP4A Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles
- High-Speed Motors and Spindles
- Precision Grinding Equipment
- Aerospace & Defense Systems
- Medical & Dental Handpieces
