# SpeedFeed Machinist Calculator — CNC speeds, feeds & tap drill > CNC speeds, feeds & tap drill (iPhone/iPad app by Yaniv van der Stigchel.) - Source: https://appshunter.io/ios/app/speedfeed-machinist-calculator/id6809584773 (this page in markdown: same URL + `.md`) - Developer: [Yaniv van der Stigchel](https://appshunter.io/developer/6791340700) - Category: Utilities, Productivity - Price: $12.99 - Age rating: 4+ - Requires: iOS 17.0 · 4 MB - Languages: American English, German (Germany), Japanese, Chinese (Simplified, China), Mexican Spanish - Released: 2026-09-09 - Data updated: 2026-10-10 ## What is SpeedFeed Machinist Calculator? Speeds and feeds checked against your own machine. SpeedFeed caps the RPM at your spindle's top speed, scales the feed to hold the chip load, and tells you in plain words whether the cut will work. "Good to cut", "Capped by spindle" or "Too heavy: reduce depth to 0.18 in", with the fix one tap away. MILLING Diameter, flutes, material, depth and width of cut. RPM, feed rate and chip load update as you type; there is no Calculate button. Six materials, each with a real surface speed band for carbide and HSS, flagged when your number falls outside it. Narrow cuts get chip thinning applied, with the reason shown, and a diagram draws the cutter in the material so you can see how much of the turn is in the cut. Metal removal rate included. YOUR MACHINE'S LIMITS Save machine profiles with max RPM, spindle power and max feed. SpeedFeed estimates the power the cut needs at that RPM, compares it with what your spindle makes, and warns as you near the limit. Enter the stick-out and it checks tool deflection too. DRILL AND TAP A second mode for holes: RPM and feed for HSS, cobalt or carbide drills, peck advice by hole depth, power, torque and thrust. The tap drill chart covers 44 UNC, UNF and metric coarse and fine threads, with the real thread percentage at 75% or 65%. One tap sends the tap drill to the drill calculator, and the tapping feed is written out as RPM x pitch. TOOL CRIB AND SETUP SHEETS Save cutters with diameter, flutes, coating and stick-out, and load one in a tap. Save the whole setup under a job name and share it as a one-page PDF setup sheet, or copy it as text. ALSO It works backwards: enter the RPM and feed from an inherited program to get the surface speed and chip load. Inch or metric in one tap. Big plus and minus targets for gloved hands. A method sheet shows every formula and table behind the numbers. MADE FOR THE SHOP FLOOR The math runs on the phone, so it works offline under two feet of concrete. The only part that goes online is the feedback form, when you choose to send a message. No account, no ads. The cutting data is a conservative starting point, not a replacement for your tooling manufacturer's figures. Check it against your cutter, your setup and your machine before you cut. SpeedFeed covers milling, drilling and tapping on a mill or router; it does not do turning. ## Is SpeedFeed Machinist Calculator safe? Not enough ratings yet to assess SpeedFeed Machinist Calculator. ## Is SpeedFeed Machinist Calculator legit? SpeedFeed Machinist Calculator appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for SpeedFeed Machinist Calculator is 65 out of 100 points across 7 verification signals from App Store and developer data. ## Version history (last 4 releases) ### 1.2.1 — 2026-10-06 The welcome screens now fit every screen, from the smallest iPhone to iPad, and no text runs under the buttons any more. Plus small fixes and polish. ### 1.2 — 2026-10-01 New Drill & tap mode: drilling speed and feed per diameter, peck advice by depth, and power and torque checked against your machine. A tap drill chart for UNC/UNF and metric threads, with the tapping feed worked out for you. Drilling is now part of your setups and the printable sheets, with clearer gauges and larger touch targets. ### 1.1 — 2026-09-24 SpeedFeed is now available in German, Japanese, Spanish (Mexico), and Simplified Chinese, plus British English. Also added: a sixth material preset for alloy steel (4140/4340 chromoly). ### 1.0 — 2026-09-10 No release notes. ## More apps by Yaniv van der Stigchel - [Every Angle](https://appshunter.io/ios/app/every-angle/id6791340698) - [evnt: venue agenda tracker](https://appshunter.io/ios/app/evnt-venue-agenda-tracker/id6792543254) - [DAF Speech Jammer & Fluency](https://appshunter.io/ios/app/daf-speech-jammer-and-fluency/id6809582675) - [Gift Tracker: Christmas List](https://appshunter.io/ios/app/gift-tracker-christmas-list/id6809765243) - [DuctWise HVAC Duct Calculator](https://appshunter.io/ios/app/ductwise-hvac-duct-calculator/id6814964642) All apps by Yaniv van der Stigchel: https://appshunter.io/developer/6791340700 --- *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 2026-10-10.*