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Kernlochbohrer-Tabelle — Kostenloses Online-Tool

Vorbohrung für jedes Gewindemaß

Finde den richtigen Bohrer für jedes Gewinde. Metrisch + Zoll. 75% und 50% Gewindeeingriff. Schnelle Tabelle ohne Anmeldung.

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Tap drill size calculator

Find the correct drill bit for any tap. UNC, UNF, metric.

How to use this tool

  1. 1

    Pick tap size

    Select from standard UNC/UNF/metric.

  2. 2

    Pick thread engagement %

    75% standard; 50% for hard materials.

  3. 3

    See drill size

    Exact + closest standard bit.

Frequently Asked Questions

Why 75% thread engagement?
Standard engagement. Gives 95% of thread strength but 66% of the drilling effort vs 100%. Industry default for most jobs.
When to use 50%?
Hardened steels, stainless, or when breaking taps is a concern. Weaker threads but much easier tapping.

Wichtigste Punkte

  • Tap Drill Size Chart is a free, browser-based calculator tool — pilot hole size for any tap thread.
  • Nein signup, no downloads, no file uploads. Tools run in your browser; the few that need an outside service say so on the page.
  • Works on desktop, tablet, and mobile. Install as a PWA for offline access.

How to Use Tap Drill Size Chart

  1. Open the tool: Launch Tap Drill Size Chart on Toololis — no account or download needed.
  2. Enter your data: Paste text, enter values, or select a file directly in your browser.
  3. Get instant results: Everything is processed locally — results appear immediately.
  4. Copy or download: Save your output or share it. Bookmark for quick access next time.

Tap Drill Size Chart — Quick Facts

Preis
Kostenlos — keine Limits, kein Wasserzeichen, keine Paywall
Privatsphäre
Wird im Browser verarbeitet. Tools, die einen externen Dienst brauchen, sagen das auf der Seite. Seitenaufrufe werden gezählt (Google Analytics).
Plattform
Jeder moderne Browser — Desktop, Tablet, Mobil
Kategorie
Rechner Tools on Toololis
Offline
Works offline after first visit (Progressive Web App)
MerkmalDetails
ToolTap Drill Size Chart
KategorieRechner
Anmeldung nötigNein
Datei-UploadKeine — wird im Browser verarbeitet
Mobile-UnterstützungVoll responsive
KostenFür immer kostenlos

Why Use Tap Drill Size Chart?

You should try Tap Drill Size Chart for a quick, private way to pilot hole size for any tap thread. Processing happens in your browser and files are never uploaded; the few tools that need an outside service say so on the page.

On the other hand, dedicated APIs or desktop tools suit batch processing better. They also handle server-side automation. For everyday tasks, browser tools offer the best speed, privacy, and convenience.

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100% Privatsphäre. Dieses Tool läuft komplett in deinem Browser. Deine Daten werden niemals auf einen Server hochgeladen.