CNC Machinist Tools

CNC Machinist Tools is an offline machining toolkit for machinists, CNC operators, students and workshop use. Quickly calculate machining parameters, inspect local G-code files, preview 2D toolpaths, solve thread geometry, generate bolt-circle coordinates and handle common shop calculations — all directly on your iPhone. Speeds & Feeds Calculate RPM and feed rate for: Milling Turning Drilling Metric and imperial units Enter your own cutting parameters and get clear, repeatable results. G-Code Viewer Open local .nc, .gcode, .ngc, .tap and .txt files. Read G-code with line numbers Search and jump to source lines View parsing diagnostics and program summaries Preview supported toolpaths in XY, XZ and YZ views Zoom, pan, fit and inspect toolpath-to-source mapping G-code viewing is read-only and intended for inspection and reference. Thread Calculator Calculate theoretical thread geometry for: ISO Metric Unified Inch Pitch / TPI Multi-start threads Pro unlocks additional theoretical thread dimensions and formula details. Tap Drill Calculate theoretical cutting-tap drill diameters using metric or imperial inputs and configurable thread engagement. Bolt Circle Generate X/Y hole coordinates from: Pitch circle diameter Hole count Start angle Center position Rotation direction Copy calculated coordinates for use elsewhere. Taper Calculate taper dimensions, taper per unit length, half-angle and included angle, or solve for an unknown dimension. More Workshop Tools Drill Size Converter Unit Converter Metal Weight Calculator History Favorites Machine Profiles Machine Limits Formula Details Metric & Imperial Work comfortably in either measurement system, including fractional-inch display where appropriate. Lifetime Pro Unlock: Tap Drill Metal Weight Machine Profiles & Limits Advanced Thread Details Formula Details Favorites Unlimited History One-time purchase. No subscription. CNC Machinist Tools performs calculations locally and is designed as a reference and productivity tool for machining work.