# WS Drill Bits

> Machinist's drill bit calculator for sizes, speeds, feeds, and point depth. (iPhone/iPad app by Rein Rapp.)

- Source: https://appshunter.io/ios/app/ws-drill-bits/id1453137463 (this page in markdown: same URL + `.md`)
- Developer: [Rein Rapp](https://appshunter.io/developer/1031133571)
- Category: Education
- Price: Free
- Rating: 5.00/5 from 2 App Store ratings
- Age rating: 4+
- Requires: iOS 9.0 · 57 MB
- Languages: English
- Released: 2019-02-16
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/ws-drill-bits/id1453137463/reviews.md

## What is WS Drill Bits?

Workshop (WS) Drill Bits

Is a full functioning Drill Bit Calculator simply designed for the Machinists Workshop,
Designer's and Manufacturing Personel.
Contains the following three functions:

1) A vertical scrolling Drill Size and Decimal Equivalent Chart. 
   *From 0.1mm(0.00394 Inch) to 101.6mm(4.0 Inches)
   *Offers Fast Vertical Scrolling
   *Inch Fractions are highlighted in Blue 
   *Metric Numbers are highlighted in Red
   *Gage/Letter Numbers are also listed 
   *Inch Fractions values are also listed.
   *A sliding scale allows you to jump to any point on the list fast.(Separately for both mm and inch values)

2) Twist Drill Speeds and Feeds
   *Calculates recommended Drill Speeds and Feed Rates for various materials:
   *Option to enter in either Metric or Inch size Drills
    -Aluminium
    -Brass
    -Bronze
    -Cast Iron
    -Hastelloy
    -Inconel
    -Magnesium
    -Monel
    -High Nickel Steel
    -Free Cutting Steel
    -Mild Steel
    -Steel
    -Tool Steel
    -Forgings
    -Alloys
    -Heat Treated Steels
    -Stainless Steels
    -Titanium
    -Wood and Plastics

3) Drill Point Depth Calculator
   *Calculates the Drill Point Depth for various Drill Point Angles (60',82',90',118',120',135')
   *Option to enter in either Metric or Inch size Drills.

## Key features

- Drill size and decimal equivalent chart
- Fast vertical scrolling with color-coded values
- Sliding scale for quick list navigation
- Speeds and feeds calculator for various materials
- Drill point depth calculator
- Supports metric and inch measurements


## Frequently asked questions about WS Drill Bits

### What is the range of drill sizes covered by WS Drill Bits?

WS Drill Bits includes a vertical scrolling chart covering drill sizes from 0.1mm (0.00394 Inch) to 101.6mm (4.0 Inches). This range is suitable for a wide variety of machining tasks.

### How does WS Drill Bits help with calculating speeds and feeds?

The app calculates recommended drill speeds and feed rates for numerous materials, including various steels, alloys, aluminum, brass, and even wood and plastics. You can input drill sizes in either metric or inch measurements.

### Can WS Drill Bits calculate drill point depth?

Yes, WS Drill Bits features a Drill Point Depth Calculator. It allows you to calculate the depth for different drill point angles, such as 60', 82', 90', 118', 120', and 135', using either metric or inch drill sizes.

### What materials are supported for speed and feed calculations in WS Drill Bits?

WS Drill Bits supports a comprehensive list of materials for speed and feed calculations, including Aluminium, Brass, Bronze, Cast Iron, Hastelloy, Inconel, Magnesium, Monel, High Nickel Steel, Free Cutting Steel, Mild Steel, Steel, Tool Steel, Forgings, Alloys, Heat Treated Steels, Stainless Steels, Titanium, Wood, and Plastics.

### Does WS Drill Bits offer offline functionality?

The provided description does not specify offline functionality. However, as a calculator app, it is likely designed to perform calculations without an active internet connection once installed.

### How often is WS Drill Bits updated?

The latest version of WS Drill Bits is 1.1, last updated on June 21, 2020. This indicates updates may not be very frequent, but the app has been stable since its release in February 2019.

### Is WS Drill Bits available on Android devices?

WS Drill Bits is currently listed as supported on iPhone, iPad, and iPod. There is no information provided about its availability on Android devices.

### What is the user sentiment for WS Drill Bits?

Based on the available data, WS Drill Bits has a perfect rating of 5.0 stars from 2 ratings. This suggests a very positive user experience among its current users.

## Version history (last 2 releases)

### 1.1 — 2020-06-21

Minor bug fixes.

### 1.0 — 2019-02-15

No release notes.

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## More apps by Rein Rapp

- [WS Geometry](https://appshunter.io/ios/app/ws-geometry/id1435683784)

All apps by Rein Rapp: https://appshunter.io/developer/1031133571

## Related topics

[drill chart](https://appshunter.io/ios/topics/drill-chart) · [soroban drill](https://appshunter.io/ios/topics/soroban-drill) · [drill size charts](https://appshunter.io/ios/topics/drill-size-charts) · [drill drop](https://appshunter.io/ios/topics/drill-drop)

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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 2026-06-10.*