Thread chart, tap drill chart & CNC lathe calculators. Fast. Works offline.
About Thread Chart: Tap Drill & CNC
Thread Chart: Tap Drill & CNC is a tools app developed by Siberian Apps.
Download Statistics
Thread Chart: Tap Drill & CNC has been downloaded 97 thousand times. In the last 30 days, the app was downloaded 670 times.
User Ratings
Thread Chart: Tap Drill & CNC is rated 4.00 out of 5 stars. The rating is based on 640 ratings.
App Information
Thread Chart: Tap Drill & CNC is FREE to download. The APK download size is 10.86 MB. The latest version available is 5.0.0. The last update was on May 20, 2026.
Technical Requirements
Thread Chart: Tap Drill & CNC requires Android 4.4+ or higher. The app has a content rating of Everyone. The app has been available on Google Play April 2019.
Description
The thread chart and tap drill reference you actually want on the shop floor. Thread Chart & CNC Calculator puts every thread standard, machining calculator and thread identifier in your pocket — ready in seconds, no internet required.
Machinists, CNC programmers and engineers use it daily: to identify an unknown thread by caliper measurement, look up tap drill sizes, calculate speeds and feeds, and reference specs across 27 thread standards — all without leaving the shop floor.
THREAD CHART & TAP DRILL CHART Look up any thread size chart entry: pitch, TPI, major/minor diameter, tapping drill, clearance drill and more — and find the right drill bit size for any tap. From metric thread charts to UNC, UNF, UNEF, UNS, UN, BSW, BSF, BSPP, BSPT, NPT, NPTF, RC, ACME, Stub ACME, Trapezoidal, Buttress, Knuckle, Worm, API and other standards — all in one place.
THREAD IDENTIFIER BY MEASUREMENT Got an unknown thread? Measure with calipers, enter the diameter and TPI — the app instantly matches it across all supported standards.
THREAD PROFILE DIAGRAMS Clear diagrams for each thread type — see the geometry, understand the form, spot the differences between standards at a glance.
CNC & MACHINING CALCULATORS Full speeds and feeds calculator: cutting speed, spindle speed (RPM), feed rate, feed per tooth, feed per revolution, machining time, material removal rate, cutting power, torque and depth of cut — for lathe turning, milling and general workshop setup.
GEOMETRY CALCULATORS Cone dimensions, hex and square blanks, coordinate rotation, trig values and degree conversions.
ENGINEERING REFERENCES GD&T drawing symbols, Fe-C diagram, material melting temperatures, hardness tables and bearing fits.
WORKS OFFLINE Every thread chart, table and calculator works without a connection. Perfect for workshops, production floors, lathe and CNC setup where Wi-Fi isn't always an option.
FAVORITES Save the threads and calculators you use most for instant access.
Built for machinists and real shop floor use — whether you're identifying a mystery thread, setting up a lathe or CNC job, calculating feeds and speeds, or just need a tap drill size fast.
Recent changes: Version 5.0.0 • New Thread Finder: search threads by measurements • New home screen and updated app design • New section with reference materials • Bearing Fits calculator • Calculators for hex and square blanks • Favorites
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Comments on Thread Chart: Tap Drill & CNC for Android
★★★★☆D Lovett· Jun 9, 2022
Works great and tons of info. One more star if updates get made to go one step above everyone else in this space. Would be fantastic if the calculations that are auto generated are also applied to the thread profile image. For the moment we still get the typical image with formulas (5h/8, p/8, etc.), why not let the app do the rest of the calculations. Would gladly purchase a pro version if such a tool were available.
★★★★★Phillip Lay· Mar 3, 2021
Like the update. Very useful at work. 5 stars. I Would like to see the hole size needed for the chosen thread make a return.
★★★★★6.0 Powerstroke· Feb 2, 2025
I use this app at work mostly to figure out ID and OD for machining threads. So far it's worked great. I can't tell on the rest of the app as I haven't explored or needed the rest of it.
★★★★★NAGA SUBRAMANIAN· Feb 15, 2022
Very much useful but I need BSW standard also.
★☆☆☆☆Astro Stars· Nov 14, 2019
Why there Is no English language. It looks like a good app. But I can't use.
Google Play Rankings for Thread Chart: Tap Drill & CNC
This app is not ranked
Technologies used by Thread Chart: Tap Drill & CNC
Thread Chart: Tap Drill & CNC is requesting 12 permissions and is using 17 libraries.
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