7308 ACCBM
Single Row Angular Contact Ball Bearings
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Part No.
Part No.
7308 ACCBM
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.68 kg
Tolerance class
P6 (ABEC-3)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
40 mm
Bore diameter tolerance
-0.01mm to 0
Outside diameter
90 mm
Outside diameter tolerance
-0.013mm to 0
Width
23 mm
Width tolerance
-0.05mm to 0
Chamfer dimension
1.5 mm
Contact angle
25 °
Distance from side face to load point
26 mm
Inner Ring Dimensions
Inner ring large-side shoulder diameter
59.7 mm
Inner ring small-side shoulder diameter
49.55 mm
Outer Ring Dimensions
Shoulder diameter outer ring
71.32 mm
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
12600 lbf
Radial static load rating
8100 lbf
Limiting speed
15 X 1000 rpm
Lubrication
Lubricated
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Brass
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
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7308 ACCBM Bearing Product Overview & Core Advantages
The 7308 is a single row angular contact ball bearing engineered for applications requiring high precision and reliable performance under combined loads. Its optimized design enables it to efficiently support significant radial loads and one-direction axial loads simultaneously. Manufactured to a P6 (ABEC-3) tolerance class, it guarantees exceptional running accuracy, making it ideal for high-speed spindles and other demanding machinery. The bearing is pre-lubricated for immediate use and operates effectively within a wide temperature range.
7308 ACCBM Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7308 | Standard bearing designation indicating a metric, single row angular contact ball bearing with a 40mm bore. |
| Open (Seal Type) | No integral seals or shields, allowing for higher speed capability and optimal lubrication management in controlled environments. |
| P6 (Tolerance Class) | Denotes a precision bearing with dimensional and running accuracy equivalent to ABEC-3, ensuring smooth operation and reduced vibration. |
| 25° (Contact Angle) | A standard contact angle that provides an excellent balance between radial and axial load carrying capacity. |
7308 ACCBM Bearing Structural Features & Performance Benefits
- Optimized Internal Geometry: The 25° contact angle and precisely calculated shoulder diameters ensure stable contact between the balls and raceways, delivering high rigidity and accurate rotational performance.
- Superior Load Capacity: Engineered to handle combined loads effectively. The design provides high dynamic and static load ratings (12,600 lbf / 8,100 lbf) for demanding applications.
- High-Speed Capability: The brass cage offers excellent durability and guidance at high rotational speeds, contributing to a limiting speed of 15,000 rpm.
- Precision & Reliability: Manufactured from high-grade chrome steel and held to P6 tolerance, this bearing ensures minimal runout and long-term operational reliability in precision equipment.
7308 ACCBM Bearing Typical Application Areas
This angular contact ball bearing is ideally suited for:
- Machine Tool Spindles
- High-Speed Electric Motors
- Pumps and Compressors
- Precision Gearboxes
- Agricultural and Construction Machinery
