Brief Description: Tank Prep - Access Hole Drill Out Large Hole 2
Then I placed the plate cover on the rib, clocked it according to drawing and drilled the bolt holes through the rib and into a piece of wood. Then I clecoed the rib to the wood to hold it for drilling. I lowered the speed of my drill press to the slowest which is 300 RPM. The fly cutter did a nice job of cutting out the access hole. Worked good. I made the cut out per drawing which is 1/2 smaller the diameter of reinforcement ring.