# DatumLab

> Thread, Tolerance & CNC Calc

Canonical page: [https://chrome-stats.com/d/id6780406607](https://chrome-stats.com/d/id6780406607)

## Overview

- **ID:** `id6780406607`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** 建东 刘
- **Category:** Utilities
- **Version:** 0.1.0
- **Last updated:** 2026-06-17
- **First published:** 2026-06-17
- **Size:** 3.50 MB
- **Data as of:** 2026-09-24
- **Store listing:** [Apple App Store](https://apps.apple.com/id/app/datumlab/id6780406607)
- **Website:** [https://opoojkk.com](https://opoojkk.com/)
- **Privacy policy:** [https://sites.google.com/view/privacy-policy-for-datumlab/en](https://sites.google.com/view/privacy-policy-for-datumlab/en)

## Description

Fast offline calculators for threads, tolerances, speeds, feeds, units, and material references in the shop or at your desk.

DatumLab is a practical mechanical toolbox for machinists, CNC operators, mechanical designers, and shop-floor technicians.
Use it to look up common thread data, calculate ISO fits, estimate speed and feed values, convert shop units, check material references, and save frequently used setups. Core tools work offline, so you can keep working at the machine, in the workshop, or during design review without depending on a network connection.
Key tools:
Thread calculator for metric, UNC, UNF, BSP, NPT, trapezoidal, and Heli-Coil references
Tap drill, clearance hole, pitch, pitch diameter, and minor diameter lookup
ISO tolerance and fit calculator for common hole and shaft zones
Speed and feed calculations for milling, drilling, tapping, and turning
Radial chip thinning and thread turning helpers
Unit conversion for length, pressure, torque, speed, force, and mass
Material references for common aluminum, steel, stainless, non-ferrous, and plastic materials
Weight, bolt preload, and geometry helpers
Favorites, recent calculations, custom tools, custom materials, and exportable reports
DatumLab is designed for quick reference and setup planning. Values are reference starting points only. Always verify final machining parameters with your tool, machine, workholding, material, and supplier recommendations.

## Rankings

- #1,887,759 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6780406607)