Charts
Reference charts
Tap drill, drill size, cutting speed, thread pitch, metal density, Morse taper, decimal equivalent and change gear charts, generated from the published standards.
SheetCharts
BasisResearched
Checked2026-09-24
ChartTap drill chart for inch and metric threadsTap drill sizes for every common UNC, UNF and ISO metric thread at the standard 75% thread, with decimal and millimeter equivalents.ChartDrill size chart: number, letter, fractional and metricEvery number drill #1 to #80 and letter drill A to Z in decimal inches and millimeters, with the nearest fractional and metric equivalents.ChartCutting speed chart: SFM by materialStarting surface speeds in SFM for HSS and carbide turning and milling and HSS drilling in 17 metals and plastics, with RPM at common diameters.ChartThread pitch chartThreads per inch and pitch in millimeters for every standard UNC, UNF and ISO metric coarse and fine thread, with major and minor diameters.ChartMetal density chartDensity of steel, stainless, aluminum, brass, copper, bronze, cast iron and titanium in lb per cubic inch and g per cubic centimeter, with bar weights.ChartMorse taper chartMorse taper sizes MT0 to MT6 with large end diameter, taper per foot and angle per side, and which size common mini lathes and drill presses use.ChartDecimal equivalent chartEvery 64th of an inch from 1/64 to 1 inch as a decimal and in millimeters, the conversion every caliper and micrometer reading needs.ChartMini lathe change gear chartComputed change gear trains for inch and metric threads on 7x mini lathes with a 16 TPI leadscrew and the standard supplied gear set.IndexTap drill sizes by threadOne page per UNC, UNF and metric thread.IndexDrill sizesEvery number and letter drill.IndexSpeeds and feeds17 materials by 5 tools.IndexMetal weight tables8 metals by 8 shapes.
