1. Only tempered glass with a width greater than 8 times thickness can be drilled.

2. For tempered glass with a thickness not exceeding 12 mm, the distance from the edge of the hole to the edge of the glass shall not be less than 1.5 times the thickness of the glass; for tempered glass with a thickness exceeding 12 mm, the distance from the edge of the hole to the edge of the glass shall not be less than 2 times the thickness of the glass.

3. The diameter of the circular hole on the tempered glass should be at least 1.6 mm larger than the thickness of the glass; the diameter of the circular hole should be less than 1/3 of the width; the radius of the rounded corner of the shaped hole on the glass plate should be larger than that of the glass. thickness.

4. When opening at an angular position of not less than 90o, the distance from the edge of the hole to the tip of the corner should be greater than 6.5 times the thickness of the glass.

5. The concave part should adopt a fillet radius not less than the thickness of the glass.