Four-Point Angular Contact Bearing QJ308
QJ308 four-point contact ball bearing (40mm bore) accommodates axial loads in both directions, used in crystal boule grinders for semiconductor preparation. Single row design supports radial/axial combinations per statistical notes. HTS 8482.10.5028 classification.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If double-row construction
Double-row angular contact bearings have separate provisions.
If with nonferrous retainers
Special materials in bearing parts trigger parts classification.
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Import Tips & Compliance
• Confirm four-point geometry via sectional drawings; note bidirectional thrust
• Common error: confusing with double-row under 8482.10.5032
• Track via ABI for statistical reporting
Related Products under HTS 8482.10.50.28
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