Deburring is typically performed through cross-holes because this usually provides smoother access to the burrs. Cross-holes are often shorter, making it easier for the tool to be inserted. Since cross-holes are also usually drilled after the main hole, accessibility using a deburring tool through the cross-hole is guaranteed in this process setup. Furthermore, it is crucial to consider which burrs are more critical in subsequent steps (e.g., for the functionality of the component). If the more critical burrs are located within the cross-hole, then deburring of that hole should be prioritized.
Application cases from practice
Cross-hole deburring
Workpiece: 11SMn30+C steel, hydraulic components
Tool: HSD (High-Speed Deburring) deburring tool
“For quality reasons, even small batches of hydraulic components should be completely deburred using machine tools. HSD tools are designed such that the cutting edges remain retracted when there is no pressure impact from the cooling medium, only extending when pressure is applied at the required location to remove burrs with an ‘impact’ action. Depending on the material, even large burrs with a root thickness exceeding 0.2 mm, including attached collars or drill caps, can be reliably removed. Despite varying bore diameters, an HSD tool with a diameter of 11.30 mm can also be used for deburring cross-holes on other parts. For bore diameters larger than the standard 4-inch size, the same HSD tool can be used in a circumferential spiral motion to traverse the area to be deburred, also reliably removing burrs.”