LatheCalcPro
CNC Lathe Calculator
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Built for the shop floor — not the desk.
LatheCalc Pro is a professional offline calculator for CNC lathe operators, programmers, and machinists. No account, no network, no data upload. ISO standard tables and calculation engines are built in, so you can look up specs and run numbers even when signal is weak.
CUT POINTS
Browse T01–T42 contour templates with clear diagrams. Supported models solve tangent coordinates, apply tool-nose radius compensation, and output G-code references — less manual math, fewer copy errors.
METRIC THREADS
ISO 261 diameter–pitch lookup (M1–M100). Theoretical profile sizes per ISO 68-1 / ISO 724. Coarse and fine pitches, custom geometry mode for non-standard profiles.
TOLERANCE & FITS
ISO 286 hole and shaft tolerances, standard fits (e.g. H7/g6), and manual deviation entry. Tolerance-band visualization helps you read drawings faster.
SURFACE SPEED / RPM
Convert between cutting speed and spindle speed from work diameter. Metric and imperial units. Optional machine max-RPM warning when results exceed your limit.
CHAMFER & TAPER
Multiple solve modes for known dimension combinations. Diameter/radius input toggle. Taper per ISO 3040 with clear full-angle (α) vs half-angle (β) handling.
WHY LATHECALC PRO
• Fully offline — standards and engine bundled in the app
• Shop-friendly — large numeric keypad, glove-friendly layout
• History & favorites — reuse inputs in one tap
• English & Chinese — UI and diagrams
• Traceable results — solver version, standard pack, and input summary
• Flexible settings — units, X diameter/radius mode, display precision
FOR
CNC lathe operators, process engineers, programmers, and machining students who need fast ISO lookups and reliable field calculations.
Thread program generation
G76 / G92 / G32 now support FANUC, Siemens (ISO mode), Mitsubishi (G-code list 2) and GSK. GSK is split into 980TDi and TB3i/TC3/TDHi, each following its own manual.
Fixed oversized G76 depth values for FANUC inch threads.
Programs now show line numbers, so a wrapped long block is clearly still one block.
Switching the CNC system now clears the previous program to prevent mix-ups.
Programs now begin with a reminder to call the threading tool and offset before running.
Interface
Fixed the sideways wobble on the thread page and others. The "swipe" hint now appears only when there are more options to scroll to.
The developer, 瑞龙 栗, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 瑞龙 栗
- Size
- 15.1 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Simplified Chinese
- Age Rating
4+
- 4+
- Copyright
- © 2026RUILONG