Case Study 18丨The 0.8 mm Hole — A Precision CNC Machining Service Storyontrol make the difference in precision CNC machining service.

A European customer once sent us a set of optical metal parts that had caused repeated assembly failures.
The problem was a 0.8 mm hole that previous suppliers could not machine consistently. Even small deviations caused misalignment during assembly.

After reviewing the drawings, our engineering team did not start machining immediately.
We first analyzed the assembly path, reviewed fixture positioning, and evaluated tool access for micro machining.

To ensure accuracy, we redesigned the fixture layout and conducted multiple micro-tool test cuts before final production.
Through controlled process adjustments, we achieved a stable concentricity of 0.01 mm on the 0.8 mm hole.

When the customer assembled the parts, the issue disappeared.

“I didn’t know this problem could actually be solved,” he said.

Since then, whenever he encounters a difficult part, his response is simple:
“Send it to XY-GLOBAL.”

This is how our precision CNC machining service supports customers—not by rushing production, but by solving the real engineering problem behind the drawing.