Air Vent corevent

#3 - Slot Width/Screen Mesh: The width of the slot or the size of the mesh required is determined by the size of the sand (mesh) being used in the construction of your core. The width/mesh of your vent must not be greater then the sand mesh in order to hold the sand in the core box while permitting the air to escape. #4 - Dimensions: Depth– is based on the depth of the shoulder created by the step drill (insert drill). Head Thickness– affects the ability to contour the vent to the tool surface. The thicker the head the more contouring can be done and the thinner the head the less likely it is to clog with binders. Diameter– is determined by the size of the area requiring venting and the number of vents preferred in the particular location on the core box.