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Milling Tools

Threads

Choose the standard and size — you get the drill for the hole and the bar diameter for an external thread.

Example: M6 → drill Ø 5.0 mm (cutting tap), Ø 5.5 mm (forming tap), bar Ø 5.90 mm.

Try the example

Tap drill size and bar diameter

Choose the standard and thread size. You get the drill for an internal thread (hole) and the bar diameter for an external thread (rod / bolt).

Standard

    Values are common starting recommendations (drills per ISO 2306 and UNC/UNF charts for ~75 % thread). Always check your tool maker catalogue.

    ISO 286 fits, ISO 2768 general tolerances and Ra roughness are now in the CAD tools.

    Rather not machine it yourself? Send us a STEP file or drawing — we make the part in aluminium, brass or plastic on our DATRON neo and send you a price. Get a CNC quote →