# Machining App for Machinists — Machining Calculator and Chart

> Machining calculator and reference tool for drilling, milling, and turning. (iPhone/iPad app by Motionics LLC.)

- Source: https://appshunter.io/ios/app/machining-app-for-machinists/id511994451 (this page in markdown: same URL + `.md`)
- Developer: [Motionics LLC](https://appshunter.io/developer/424498959)
- Category: Productivity, Utilities
- Price: Free
- Rating: 2.10/5 from 9 App Store ratings · 12 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.0 · 77 MB
- Languages: American English
- Released: 2012-03-27
- Data updated: 2026-08-26
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/machining-app-for-machinists/id511994451/reviews.md

## What is Machining App for Machinists?

iMachining is an iPhone App designed for machinists, technicians, engineers and student to be used as a machining calculator and also a reference tool for drilling, milling and turning (lathe). It is designed to be very easy-to-use and user-friendly at shops.   


Features: 

*** Turning (Lathe) *** 
- Calculate RPM given Cutting Speed and Cutting Diameter
- Calculate Cutting Speed given RPM and  Cutting Diameter
- Calculate Machining Time given Cutting Length, RPM and Feed/Turn 
- Metric and Imperial units (mm, inch)

*** Milling *** 
- Calculate RPM given the Cutting Speed and Tool Diameter 
- Calculate Tool Feed Rate given Feed/Tooth, Tool Diameter and number of tool teeth
- Calculate Machining Time given the Feed and Cutting Length
- Metric and Imperial units (mm, inch)
  
*** Drilling *** 
- Find RPM given the Cutting Speed and Tool Diameter
- Find Feed Rate given the Cutting Feed (inch/rev) and RPM
- Find Machining Time given the cut length and feed rate
- Metric and Imperial units (mm, inch)

*** Reference Tool: Tap Size Charts *** 
- Interactive tap size charts
- Fractional, Screw Size and Metric Standards
- Coarse and Fine threads
  
*** Reference Tool: Drill Size Charts *** 
- Interactive drill size chart
- Fractional, Letter, Wire Gauge and Metric Standards
- Drill Size in mm and inches

*** Reference Tool: Machining Parameters ***
- Interactive machining parameter charts for cutting speed and feed rates for different materials
- Machining parameters for different tool materials: HSS and Carbide
- Feed rates for milling and turning
- Selection between Metric and Imperial units

## Key features

- Turning (Lathe) calculations
- Milling calculations
- Drilling calculations
- Tap size charts
- Drill size charts
- Machining parameter charts
- Metric and Imperial units

## Recent user reviews (10 of 12)

All indexed reviews: https://appshunter.io/ios/app/machining-app-for-machinists/id511994451/reviews.md

### 1/5 — The is useless

*2024-10-01*

It’s basically so ungodly useless it won’t let you write GM code ya know the most important part of learning Cnc mechanizing. 

learning how to do Feeds and RPM 

Here if your not knowing how 

3.82X mill or drill speed divid by dia 

there ya go that’s it unsure how anyone would struggle with that.

### 5/5 — Great app for hobby machinist

*2021-09-06*

I really like this app.  I have a small home shop and have more trouble remembering my feeds & speeds these days.  Since getting this app I don’t go into the shop without my phone.  It’s a quick and easy check of my feeds and speeds as well as one location for my most often used reference info.

### 3/5 — Cutting Speed Error

*2021-04-10*

The ‘Turning’ section when in ‘metric’ mode shows the cutting speed as m/min but the instructions say it is in mm/minute. It only works for me if it is my/minute.

### 1/5 — Review

*2020-10-01*

Can no longer access the App without signing in with Google or Facebook. 
Not what you need when you have no connection and need some info.

### 1/5 — Forced account and email spamming

*2020-09-07*

New update forces the collection of email address. And forces the user to agree with getting spam.

### 3/5 — $5 and still ads

*2016-03-15*

The app itself is amazing and it does everything I need it to. It is just really annoying having to pay $5 for an app with a permanent ad at the bottom, that's why it's 3 stars not 5.

### 5/5 — Amazing

*2012-11-01*

I got this app because I need a quicker way of working my speeds and feeds for machining and this app help me do them in seconds, so I was able to machine things faster and was able to make more in one hour. So I earn extra money every day. Defiantly worth it

### 5/5 — Handy App…  NICE

*2012-06-02*

I really recommend this App for those of you who are in machining field.. I wish I had this App 5 years back when I started my… job 
Beside its help in regular machining work, I learned a lot on the basics of machining from this App.. A simple but very useful tool

### 2/5 — Looks nice, not much info though

*2012-05-07*

To the Developer: I hate to slam any of these apps that try to educate Machinists, but please go back and review what information you have put into this app.

Although this app has some nice pictures and explains how to use each area, the fields you need to populate are cluttered on the screen due to the graphics. Most apps similar to this don't need to have explanations as they are self-explanatory. I do like how one answer leads into the next question.

The Machining Parameters section is vague. Take for instance the Stainless Steel Section. There are several types of Stainless Steels and the proper SFM can vary quite a bit depending upon material hardness as well as which coating and carbide substrate is used, thus the reason why other apps probably don't include this detail and mislead someone unless provided by a tool manufacturer promoting their own product. The Turning Feed section should have some correlation between Depth of Cut and type of Tool Nose Radius at the least. The Milling Feed section needs to take into consideration Diameter of Tool and the Depth of Cut and available Horsepower. I wouldn't try those feedrates on Stainless or Alloy Steels unless I had my hand on the Big Red Button.

The Tap Drill Sizes are based off of older Drill Charts. Beware as the percentage of threads these suggest can cause problems with tap breakage or sloppy gaging. I prefer it when you can calculate the Minor Diameter Hole Size by the percentage of thread you wish for the fit you are after.

Nice start, I'm sure to use it at times. But there are other apps that still are much more accurate, user friendly and not cluttered.

### 5/5 — CNC2021

*2012-04-19*

Really useful App… The best of its kind that o have ever seen. Very easy to use with very useful reference tables that usually I need them in the shop… I love having my phone as a tool at my work.. 
Feedback: It would be nice if you add more speed and rate data for other materials ..

## Frequently asked questions about Machining App for Machinists

### What machining operations does Machining App support?

Machining App supports calculations and reference data for turning (lathe), milling, and drilling operations. It includes features for calculating RPM, feed rates, and machining time for each of these processes.

### Can Machining App handle both metric and imperial units?

Yes, Machining App supports both metric (mm, inch) and imperial units for all its calculations and charts, making it versatile for different workshop standards.

### What kind of reference charts are available in Machining App?

Machining App offers interactive reference charts for tap sizes (fractional, screw size, metric), drill sizes (fractional, letter, wire gauge, metric), and general machining parameters like cutting speed and feed rates for various materials and tool types.

### Is Machining App suitable for beginners?

The app is designed to be very easy-to-use and user-friendly for shops, suggesting it is suitable for machinists, technicians, engineers, and students, including those who may be new to the field.

### What is the update frequency of Machining App?

The app was last updated on September 3, 2020, with version 1.22. This indicates a less frequent update cycle compared to some other productivity applications.

### What devices does Machining App support?

Machining App is available for iPhone, iPad, and iPod. It is designed for iOS devices.

### Does Machining App have ads?

No, Machining App does not contain advertisements. It is a free application without any ad interruptions.

### What is the user sentiment for Machining App?

Machining App has a rating of 1.8 stars from 8 ratings. This suggests that current users have expressed significant dissatisfaction with the application.

## Version history (last 5 releases)

### 1.22 — 2020-09-03

Update for latest iOS version

### 1.21 — 2016-01-16

- Fixed Machining Time in Metric for Milling
- Fixed Cut Time Display for Drilling

### 1.20 — 2015-09-23

- Fixed crash in Machining Parameters page
- Optimized table display in Thread Size Chat, Drill Size Chat and CNC Codes

### 1.19 — 2015-09-12

- Fixed display issue when launching app in landscape mode
 - Other minor improvements

### 1.18 — 2015-06-26

- Optimized table display
- Fixed selector font issue
- Fixed screenshot low quality issue
- Fixed crash caused by using email function without setting up an account

## Apps similar to Machining App for Machinists

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## More apps by Motionics LLC

- [iWindTurbine](https://appshunter.io/ios/app/iwindturbine/id424498956)
- [iRotorBalance](https://appshunter.io/ios/app/irotorbalance/id430978753)
- [iAlignCalc](https://appshunter.io/ios/app/ialigncalc/id441151338)
- [VibraUnits](https://appshunter.io/ios/app/vibraunits/id445231670)
- [REBvibe](https://appshunter.io/ios/app/rebvibe/id445515440)
- [VibeSpectra](https://appshunter.io/ios/app/vibespectra/id448014799)

All apps by Motionics LLC: https://appshunter.io/developer/424498959

## Related topics

[cnc machinist calculator](https://appshunter.io/ios/topics/cnc-machinist-calculator) · [machinist](https://appshunter.io/ios/topics/machinist) · [cnc lathe calculator](https://appshunter.io/ios/topics/cnc-lathe-calculator)

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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 2026-08-26.*