Precision-machined cylindrical bore in aluminum housing for bearing installation and support
A bearing bore is a precisely machined cylindrical cavity within an aluminum CNC machined bearing housing designed to accommodate and secure rolling element bearings (such as ball bearings or roller bearings). This component ensures accurate radial and axial positioning of the bearing, maintains proper clearance fits (typically H7 or similar tolerance grades), and provides structural support to handle operational loads while facilitating efficient heat dissipation and lubrication management in rotating machinery systems.
诱因 → 失效模式 → 工程缓解
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The most common tolerance is H7 according to ISO 286-2, which provides a clearance fit for most bearing applications, typically ranging from +0.000 mm to +0.025 mm for a 50 mm bore.
Proper surface finish (typically Ra 0.8-1.6 μm) ensures even load distribution, prevents premature bearing wear, reduces friction heat generation, and maintains lubrication film integrity.
Minor damage can be repaired using precision boring and sleeving techniques, but significant damage usually requires housing replacement to maintain dimensional accuracy and load capacity.
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