Seal side processing onto a width of 8mm SUS303 plate.

The product will be delivered in the roughness of Ra 0.3μm (straight portion) and Ra 0.8μm (R portion）
The seal face processing is the most important process to create a vacuumed atmosphere.

Commonly, seal face processing cuts in a circular motion using a windmill. Because of such motion, an arc-shaped cut scar will be left on the surface and an air may flow inside, using the scar as a guide causing a breakage of the vacuum state.
To avoid such problem, it is very important to grind the surface after the seal face processing until there is no arc-shaped cut scar. However, grinding can only be done by a hand, meaning it takes a skill to have a highly precise roughness. Our skilled professionals will ensure to have the highest preciseness finish.
Our seal face processed products are currently used to create a vacuum state for tool machineries and battery cells.

Please contact us for seal face processing for us, Joyofuji Co., Ltd.