71807 ACD/P4TBTM
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71807 ACD/P4TBTM
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
25 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
26
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2106 lbf
Radial static load rating
2745 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 ACD/P4TBTM Bearing Product Overview & Core Advantages
The 71807 ACD/P4TBTM is a precision angular contact ball bearing specifically designed for demanding applications requiring exceptional rigidity and accuracy. This triplex back-to-back (TBT) matched set provides superior stability under combined loads (radial and axial). Manufactured to P4 tolerance class, it ensures minimal runout and high rotational accuracy. Its compact design and high load capacity make it ideal for high-precision, high-rigidity systems where space is constrained and performance is critical.
71807 ACD/P4TBTM Bearing Model Code Explained, Specifications & Naming Convention
The model number 71807 ACD/P4TBTM is decoded as follows:
- 71807: Basic bearing series, indicating a light-weight, high-precision angular contact design.
- ACD: 25° contact angle, optimized for supporting high axial loads.
- P4: Denotes a super-precision tolerance class, ensuring extremely tight dimensional and running accuracy.
- TBT: Specifies the bearing arrangement as a Triplex Back-to-Back matched set of three bearings.
- M: Indicates the cage material is Phenolic, which contributes to low friction and high-speed capability.
71807 ACD/P4TBTM Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The triplex back-to-back arrangement creates a highly rigid bearing system that effectively resists moment loads and shaft deflection, making it exceptionally stable under complex loading conditions.
- Superior Load Capacity: With a 25° contact angle and three bearings in a set, this configuration offers a high dynamic and static load rating, capable of handling significant combined radial and axial loads.
- Precision & High-Speed Performance: The P4 tolerance ensures precise shaft guidance and smooth operation. The lightweight phenolic cage (M) reduces centrifugal forces, allowing for a high limiting speed of 56,000 rpm.
- Preloaded for Immediate Use: The set is supplied with a light preload, eliminating internal clearance and ensuring immediate high stiffness and accurate rotational performance upon installation.
71807 ACD/P4TBTM Bearing Typical Application Areas
This bearing is engineered for the most demanding precision machinery, including:
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Machining Centers
- Aerospace Control Systems
- Medical and Dental Equipment Spindles
