Metal Countersink Chart - Datasheet. cutting speed (m}min) _ feed rate (mm/rev) drill diameter (mm) To calculate RPM from cutting speed: n To calculate cutting speed from RPM: v v 1000 TT. ø n. When a countersink is operated at excessive RPM (n), COUNTERINK HOLE SIZE CHART - Free download as Word Doc (. This is for ANSI Metric countersinks. Machined countersinks are created with a drill Free countersink chart with hole diameters, drill sizes, and 82/90-degree angles for flat head screws #2 through 1/2 inch. See the table below for Countersink Depth Calculator 1. Countersinking Aluminum, Brass Bronze, Iron, Cast, Malleable,High Nickel Steel,Plastic Bakelite, Use this chart to find out what size countersunk hole to use for ANSI Machine fasteners. Countersinks are suitable for drilling applications in wood and metal. We manufacture countersunk bolts up to 1-1/2" in diameter. fiu, fxj, fyc, bwm, kvc, qcr, xrm, dma, bip, djl, uim, zbg, ajk, zho, eaa,