Threading Dies

Choose a threading die that exactly matches the thread you need to cut. Check the diameter and pitch of the thread. The die must completely match the required size. Use cutting fluid for clean results and longer tool life. Remember that the die cuts the outside of the material. A correct choice prevents damaged threads and unnecessary wear.

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Choosing the right threading die

Which size do you need?

Measure the diameter and pitch of the thread you want to cut. The die must match that size exactly. An M12 x 1.25 die will not fit an M12 x 1.5 thread. Always check the marking on the die.

Where ordering goes wrong

Many mechanics order by bolt diameter but forget to check the pitch. Fine threads have a different pitch than coarse threads. Also check that the die suits the external diameter of the material. A wrong die damages the thread and the tool.

Why the standard matters

Threading dies to DIN 3113 guarantee an accurate cut. The dies are hardened and ground to the standard. This gives clean threads without burrs. Always use cutting oil to extend tool life.

Cutting an internal thread? Take a look at taps. If your die is not held firmly yet, a tool holder helps. If the thread is already damaged, thread repair gets you further. Everything you need for this falls under threading tools.