Thread Cut: Pitch & Tap Drill

ForestForge

About this app

A worn thread handbook in your pocket. Thread Cut finds a thread from what you can measure, then gives you the sizes and lathe numbers to cut or tap it.

• Eleven thread families: ISO metric coarse and fine, BSW, BSF, BSPP, BSPT, UNC, UNF, metric trapezoidal (Tr), Acme and Stub Acme
• Cut: pick a size and pitch for full diameters (major, pitch, minor external and internal), thread height and crest
• Tap drill and clearance hole sizes, in mm and the nearest imperial drill
• Lathe helpers: compound infeed angle, depth of cut, lead and lead angle
• Best wire size and measurement over wires for checking a thread
• Multi-start and left-hand threads, internal or external
• Identify: enter a measured outside diameter and pitch or TPI and get the closest matches
• Camera pitch gauge: line a comb up on the crests in the camera view to read the pitch. The picture stays on your phone
• Compare two threads side by side, such as 1/4 BSW against 1/4-20 UNC, with a clear warning when they won't mix
• Search by designation, save favourites and find recent threads again
• Metric or inch units. No account needed and it works offline

Figures are workshop reference values. Check critical or pressure-holding threads with proper thread gauges.

Website: https://www.forestforgeapps.com
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Questions or feedback: [e-mail]

Made by Forest Forge, an independent developer in the UK.

What’s new

Black and white icon and splash screen with the Forest Forge website.