Speeds and feeds
Spindle RPM, SFM, feed per tooth, IPM and metal removal rate.
6 more coming
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.
- 3-wire thread measuring
- Acme 3-wire thread measuring
- CNC threading formulas
- Threading calculators (Unified and metric)
- Acme thread calculator
- Metric trapezoidal 3-wire measuring
- G92 threading cycle example (Fanuc lathe)
1 more coming
Inspection and GD&T
True position, blueprint symbols, dovetails and gage setups.
- How to calculate true position
- Blueprint and GD&T symbols
- Measuring dovetails with pins
- True position calculator
- Gage block stack calculator
- Sine bar calculator
2 more coming
Layout and shop math
Bolt circles, hole coordinates, circle centers and shop trig.
- Bolt circle calculator
- Circle center from 3 points
- Circle segment calculator
- Hex, square and octagon across corners
- Degrees to decimal degrees
- Geometry and trig calculators
4 more coming
CNC programming and alarms
G-code examples, tool nose radius compensation and alarm lookups.
4 more coming
Manual machining
Tapers, tailstock offset, cross slide infeed and dividing heads.
6 more coming
Tooling and hardware
Cap screws, keyways, T-slots, collets and gears.
8 more coming
Shop power
Single-phase and 3-phase power for machine tools.
Coming later
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.
Last updated