Speeds and feeds
Spindle RPM, SFM, feed per tooth, IPM and metal removal rate.
WebMachinist.Net
Machinist calculators and shop reference. Formulas shown, sources cited, no signup.
Holemaking and tapping
Tap drills, percent of thread, center drills and countersinks.
Threading and thread measuring
Thread formulas, 3-wire measuring and lathe threading cycles.
Inspection and GD&T
True position, blueprint symbols, dovetails and gage setups.
Layout and shop math
Bolt circles, hole coordinates, circle centers and shop trig.
CNC programming and alarms
G-code examples, tool nose radius compensation and alarm lookups.
Manual machining
Tapers, tailstock offset, cross slide infeed and dividing heads.
Tooling and hardware
Cap screws, keyways, T-slots, collets and gears.
Shop power
Single-phase and 3-phase power for machine tools.
1 more coming
What this site is
WebMachinist.Net is a free machinist calculator and shop reference site. Every calculator shows the formula with your numbers plugged in, and every value names the table or standard it comes from.
Results are starting points to check against your drawing, machine and tooling. There is no signup and nothing to download, and the sourcing and corrections policies are on the about page.
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