Free tools
Tools I use. Yours to use too.
21 calculators for the questions that come up every week on the floor and at the desk. They run in your browser, remember your last inputs on your device, and use the same math I use on real parts. Each one shows its math and has a copy and print button so the numbers can go on a traveler. If one of them saves you a scrapped part, tell me.
Sheet metal
Flat patterns, gauges and bends.Fasteners & fits
Threads, torque, inserts and press fits.Tap drill & clearance holeTap drill for 75% thread and the normal clearance drill.Open tool →Thread engagement checkHow deep a tapped hole needs to be so the bolt breaks first.Open tool →Bolt torque & preloadTorque to preload, bolt stress and the margin to yield.Open tool →Thread insert drill chartDrill and tap for helical coil inserts in aluminum and plastic.Open tool →Press fit / interferenceContact pressure, hub stress, press force and holding torque.Open tool →
Machining
Speeds, feeds and hole features.CNC programming & probing
G-code, macros, probe cycles and offsets.G-code explainer & checkerPaste a program. Get a line-by-line read, warnings and an XY plot.Open tool →Fanuc Macro B referenceG65 arguments to #variables, offset addresses, syntax, and G/M codes across controls.Open tool →Probing & tool setting cycle finderWhich cycle does the job on Renishaw, Blum, Heidenhain and Siemens.Open tool →Probe result to offset writeThe exact #variable or G10 line to correct a work or tool offset.Open tool →
Tolerancing & GD&T
Stack-ups, true position and gauges.Tolerance stack-up (1D)Worst case and RSS gap from a chain of dimensions.Open tool →True position calculatorPosition error from X and Y deviation, with bonus tolerance.Open tool →GD&T quick referenceThe 14 symbols, what they control and where they go.Open tool →Go / no-go gauge sizesPlug and ring gauge sizes with gaugemaker's tolerance.Open tool →
Inspection & conversion
Units, finishes and hardness.Die casting
DFM checks before you quote.3D printing
Cost and time estimates.Motorsport
Telemetry, straight from the data logger.Want one of these built for your shop?
Quoting sheets, inspection checklists, part lookups, dashboards. Tell me what you track in a spreadsheet today.
Talk Through Your Idea→