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详情

Miniature ball bearings are a type of small-sized ball bearings designed to handle light loads and operate in compact spaces. They are commonly used in applications where space is limited and low-friction, precise movement is required. Despite their small size, miniature ball bearings offer reliable performance and are essential components in various industries and devices.

Raceway Ring Shape: Ball
Number of Raceway: Single Row
End Type: Shield on both sides

638-2Z Miniature Ball Bearing (ID x OD x W)
Inner Diameter (ID)	Outer Diameter (OD)	Width (W)
8 mm	28 mm	9 mm

Specifications

Raceway Ring Shape	Ball	Inner/Outer Ring Material	Steel
End Type	Shield on both sides	Outer Ring Type	Flat
Precision (JIS)	Grade 0	Inner Diameter	8 mm
Outer Diameter	28 mm	Width	9 mm
Dynamic Load Rating	3.97 kN	Static Load Rating	1.96 kN
Fatigue Load Limit	0.083 kN	Reference Speed	67 000 rpm
Limiting Speed	67 000 rpm	Bearing Clearance	CN
Max Temperature	120 °C	Min Temperature	-40 °C
Number of Raceway	Single Row	Size Standard	Metric System
Cage Material	Steel	Specifications / Environment	Standard
Mass	0.027 kg

Features and benefits:

Capable of carrying relatively more minor loads.
Suitable for low, medium, and high speed applications.
Suited for low noise and low torque applications.
Accommodate radial and axial loads in both directions.

Applications

Agriculture

Automotive

Electric Motors

Food Processing Machinery

Papermaking Machinery

Pumps and Compressors

Railway

Wind Energy

FAQ

Q: What are the typical sizes of miniature ball bearings?

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Q: Can miniature ball bearings handle bolt radial and axial loads?

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Q: Are miniature ball bearings suitable for high-speed applications?

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