Browse Machining Topics
Machinist Central has more than 90 free calculators, plus guides and reference charts. This page groups them by subject, so you can find everything for one kind of job in one place.
Each topic page starts with the most-used tools, then lists every related calculator, the guides that explain the theory, the charts you need at the machine and a short FAQ. Pick the topic closest to the work in front of you. Some tools appear in two topics, because a thread wire calculator is just as useful to an inspector as it is to the machinist cutting the thread.
Want everything at once instead? Browse the full calculator library or the guides list.
G-code utilities, generators, offsets, canned cycles and macros.
RPM, feed rate, chip thinning, MRR, cutting force and tool life.
Tap drills, thread wires, reaming, countersinks, torque and fits.
MIG and TIG setup, preheat, heat input, weld cost and tube layout.
Bend allowance, flat patterns, DXF makers, nesting and cut cost.
GD&T, true position, ISO fits, gauge blocks, sine bars and Gage R&R.
Hourly rate, job quotes, scrap cost, material and running costs.
Bolt circles, dividing heads, lathe threading, tapers and setup.