S71907 ACD/HCP4ADT
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71907 ACD/HCP4ADT
Basic Information
System of measurement
Metric
Weight
0.14 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
35 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
55 mm
Outside diameter tolerance
-0.004mm to 0
Width
20 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
5.556 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
3330 lbf
Radial static load rating
2812 lbf
Limiting speed
56 X 1000 rpm
Lubrication
Grease
Matched arrangement
Duplex Tandem (DT)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
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
In Stock
Price available upon request.
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S71907 ACD/HCP4ADT Bearing Product Overview & Core Advantages
The S71907 ACD/HCP4ADT is a precision angular contact ball bearing designed for demanding applications requiring exceptional performance. This high-speed bearing features a duplex tandem (DT) arrangement, combining two preloaded bearings into a single, compact unit. Its primary advantage lies in its ability to handle significant combined loads—both radial and axial—while maintaining high rigidity and rotational accuracy. Manufactured to a P4A tolerance class and equipped with ceramic balls and a phenolic cage, it is engineered for superior performance in high-precision, high-reliability scenarios.
S71907 ACD/HCP4ADT Bearing Model Code Explained, Specifications & Naming Convention
The model number S71907 ACD/HCP4ADT provides detailed technical specifications through its suffixes:
- S7: Indicates a series of high-precision angular contact ball bearings.
- 1907: Denotes the size series, with a 35mm bore, 55mm OD, and 20mm width.
- ACD: Signifies a 25° contact angle and a Duplex Tandem (DT) preloaded arrangement.
- HCP4A: Defines the high-precision attributes: P4A tolerance class and a phenolic resin cage.
- DT: Confirms the bearing is supplied as a matched set of 2 bearings in a Duplex Tandem configuration.
S71907 ACD/HCP4ADT Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex tandem arrangement and 25° contact angle provide exceptional stiffness, enabling the bearing to withstand high combined loads and maintain precise shaft positioning.
- Superior High-Speed Performance: The combination of ceramic balls (reducing centrifugal forces and friction) and a lightweight phenolic cage allows for a very high limiting speed of 56,000 rpm.
- Precision & Longevity: Manufactured to P4A tolerance for ultra-precise running accuracy. The standard grease lubrication and sealed design ensure consistent performance and a long service life within the specified temperature range of -30°C to 110°C.
- Reduced Maintenance: As a pre-matched and preloaded set, installation is simplified, and the unit offers consistent, reliable performance without the need for field adjustment.
S71907 ACD/HCP4ADT Bearing Typical Application Areas
This bearing is ideally suited for high-performance machinery where precision, speed, and rigidity are critical. Key applications include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Spindles: In PCB drilling, semiconductor manufacturing, and other high-accuracy processes.
- High-Frequency Motors: Used in spindles for routers and other high-RPM electric motors.
- Medical Equipment: In dental handpieces and laboratory centrifuges.
