MachLedger: CNC Tools

MachLedger is an offline CNC workspace for machinists, programmers, technicians, students and workshop teams. Calculate milling, turning, drilling, tapping, threading, metrology and production-planning values without an account or internet connection. Build a machine-aware setup card by selecting a machine, cutting tool and work material. Check pasted G-code for common setup risks before moving to machine-specific verification. Key features: • 81 CNC and workshop calculators • Milling, turning, drilling and thread calculations • Speeds, feeds, chip load, RPM and material-removal calculations • ISO fits, tolerance stacks, true position and surface-finish tools • Machine, cutting-tool and material profiles • Offline setup cards with conservative starting values • Static G-code preflight checks for unit mode, coordinate mode, work offsets and machine limits • Offline job board and saved calculations • PDF, CSV and JSON export • Metric and imperial units • TR, EU, US, CN and custom standards profiles • English, Turkish, German and Simplified Chinese • No account, advertising, analytics or cloud storage MachLedger provides calculation and planning assistance. Cutting data must be verified against the cutting-tool manufacturer, work material, machine, workholding and responsible machinist. G-code preflight is not machine simulation.