Small hole diameter DFM check (CNC machining)
Small hole diameter overview
Small diameter hole issue in CNC machining drilling design refers to the challenge of creating a hole with a diameter smaller than the standard drill bit size.
The issue arises due to the limitations of the drill bit size and the possible occurrence of tool wear, deflection, and vibration during the drilling process.
When drilling a small diameter hole, tool deflection and vibration become a significant problem and can cause poor hole quality, such as non-circularity, rough edges, and burrs.
Small hole diameter detection conditions
MTK identifies this issue when the following condition is met:
where:
- — actual distance from threaded hole to edge
- — actual threaded hole major diameter
- — expected maximum distance to diameter ratio
How MTK detects small hole diameters
MTK automatically analyzes B-Rep CAD models for small hole diameters. The SDK checks the relevant geometry against DFM criteria to identify potential issues that can increase manufacturing complexity or cost, or lead to quality or assembly problems.
Documentation and API reference
Detailed API reference for the small hole diameter DFM check is provided in the MTK documentation, including issue classes, detection interfaces, and integration details.
