If you are good toughness sheet metal processing, easy to crack, such as stainless steel plate. Then, the ratio of the thickness of the notches is 1: 7 or 1: 6 are suitable. <br>V groove width
If you process plates that are resilient and not easy to crack, such as stainless steel plates.<br>Then, the ratio of thickness to the notch is also appropriate: 7 or 1:6. V-slot width
If the sheet you are working on has good toughness and is not easy to crack, such as stainless steel sheet. Then, the ratio of plate thickness to groove is 1:7 or 1:6.<br>V-slot width<br>