ChipBreaker
The pocket shop reference for machinists.
ChipBreaker is an offline speeds-and-feeds and tap-drill calculator app for machinists — eight shop tools, zero internet. No account, no subscription, works with no internet.
What it does — eight shop tools in one
What it is, and what it isn't
ChipBreaker is a quick pocket reference for the hobby and home shop — the speeds, feeds, charts, and everyday math you reach for at the machine, gathered into one app and built for big buttons and greasy fingers.
- A starting point, not a verdict. Treat the cutting numbers as a sensible reference and confirm them against your machine, tooling, and material.
- Not a CAM or CNC program. It doesn't generate code or run a machine — it's a reference and calculator.
- Not in the cloud. Nothing is uploaded; it stores only your settings, on your device.
- No account, nothing tracked. No login, no analytics, no third-party scripts.
Weighing the options? See how ChipBreaker compares to the alternatives.
Free printable: the speeds and feeds card
Working at the machine? Print the speeds-and-feeds reference card, pin it by the mill or lathe, and read your starting numbers at arm's length.
Questions
Does it work offline?
Yes. After the first load it never needs the internet.
Is there a subscription?
No. There is no subscription and no recurring fee.
Do I need an account?
No. There is nothing to sign into.
Is my data private?
Yes. It stays on your device. Nothing is uploaded.
What does it run on?
Any modern phone, tablet, or computer browser — and it installs to the home screen.
Can I trust the cutting speeds it gives me?
ChipBreaker's numbers are conservative low-end starting values for hobby machines — the same figures its free printable speeds-and-feeds card carries, so the app and the wall card never disagree. Start there and adjust for your machine, tooling, and setup; no app can know how rigid your job is.
Does it handle metric sizes?
Yes where it matters — ChipBreaker's Tap & Drill includes metric taps alongside UNC/UNF and pipe threads, and the Converter flips inch to mm and fraction to decimal instantly. The cutting-speed tools work in inch units (SFM and inches), the way US shop references do.
Will it program my CNC machine?
No — ChipBreaker writes no G-code and runs nothing. It's the pocket reference for the manual side of the shop: eight shop tools, zero internet, built for quick answers at the machine.
Get ChipBreaker
Get ChipBreakerFree for now — donations welcome.
A look inside
