# Tap Drill Chart & CNC Speeds — Machinist calculator & tables

> Machinist calculator & tables (iPhone/iPad app by Nattapon Kittisuphat.)

- Source: https://appshunter.io/ios/app/tap-drill-chart-and-cnc-speeds/id6808235696 (this page in markdown: same URL + `.md`)
- Developer: [Nattapon Kittisuphat](https://appshunter.io/developer/1112583260)
- Category: Productivity, Utilities
- Price: $19.99
- Age rating: 4+
- Requires: iOS 17.0 · 3 MB
- Languages: American English
- Released: 2026-09-17
- Data updated: 2026-09-23

## What is Tap Drill Chart & CNC Speeds?

The setup is done, the tool is in the holder, and the only thing left is the number
on the control. That is the part this app is for.

SPEED AND FEED, WHILE YOU TYPE
Change the tool diameter and the RPM moves with it. There is no equals button to
miss and no second screen to open. Every result carries the formula that produced
it and the document that formula came from, so you can hand the number to anyone
who asks where you got it.

THE DRILL YOU ACTUALLY OWN
Type a thread like 1/2-13 or M10x1.5 and get a drill that exists in the drawer -
fractional, number, letter, or metric - with the thread engagement that size gives
you. Not the theoretical size. The one on your index.

IT KNOWS YOUR MACHINE
Enter your spindle's top RPM once. When a cut asks for more than the machine can
turn, the number goes red and tells you how far to back the surface speed off.
Nobody else on the floor has to catch it for you.

TABLES THAT FEED THE CALCULATOR
Unified and metric thread tables, tap drill charts, and a right-triangle and sine
bar solver that takes degrees and minutes the way your print does. Tap a row and it
lands in the calculator.

READABLE AT ARM'S LENGTH
Numbers sized to read from where you stand, buttons sized for gloves and for a phone
inside a bag. No signal needed, ever. No account, ever.

WHERE THE NUMBERS COME FROM
Cutting speeds are drawn from TC 9-524, Fundamentals of Machine Tools, published by
the Department of the Army - a public document you can look up and check. Thread and
tap drill data follow ASME B1.1 and ISO 261/965.

ONE PURCHASE
Buy it once. No subscription, no renewal, no upsell inside the app.

## Is Tap Drill Chart & CNC Speeds safe?

Not enough ratings yet to assess Tap Drill Chart & CNC Speeds.

## Is Tap Drill Chart & CNC Speeds legit?

Tap Drill Chart & CNC Speeds appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Tap Drill Chart & CNC Speeds is 75 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0 — 2026-09-17

No release notes.

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All apps by Nattapon Kittisuphat: https://appshunter.io/developer/1112583260

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-23.*