{"id":2491,"date":"2026-10-27T03:30:58","date_gmt":"2026-10-27T00:30:58","guid":{"rendered":"https:\/\/temak.com.tr\/en\/how-to-cut-threads-with-a-die\/"},"modified":"2026-10-27T03:30:58","modified_gmt":"2026-10-27T00:30:58","slug":"how-to-cut-threads-with-a-die","status":"publish","type":"post","link":"https:\/\/temak.com.tr\/en\/how-to-cut-threads-with-a-die\/","title":{"rendered":"How to Cut External Threads with a Die: Key Considerations and Tips"},"content":{"rendered":"

In machining, cutting a thread on the external surface of shafts or cylindrical parts is known as threading with a die<\/strong>. To obtain high-quality threads with the correct tolerance that tighten easily, it is extremely important to turn the blank to the correct diameter and use the right techniques before threading.<\/p>\n

In this article, with guidance from Temak Teknik<\/strong>, we cover the principles of die threading, clearance calculation, mounting the die in the die stock and a step-by-step threading procedure.<\/p>\n

1. Blank Diameter and Clearance Calculation Before Threading<\/h2>\n

The diameter of the shaft to be threaded is not machined exactly to the target nominal metric diameter. For example, if an M10 thread is to be cut and the shaft diameter is made exactly 10.00 mm, the threads will bind or fail to engage with the nut.<\/p>\n

For the nut and bolt to run freely, the shaft diameter should be reduced by 10% to 20% (approx. 0.15 mm)<\/strong> (running clearance).<\/p>\n

Running Clearance Formula<\/h2>\n

Blank Diameter = Nominal Diameter \u2212 (0.1\u00d7Pitch)<\/span><\/p>\n

    \n
  • \n

    Example (for M10)<\/h2>\n
      \n
    • Nominal Diameter: 10 mm<\/span><\/li>\n
    • Pitch: 1.5 mm<\/span><\/li>\n
    • Blank Diameter = 10 \u2212 (0.1\u00d71.5) = 9.85 mm<\/span><\/li>\n
    • Therefore, a shaft to be threaded M10 with a die should be turned to a diameter of approximately 9.80 – 9.85 mm<\/strong>.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

      Warning:<\/strong> If the shaft diameter is reduced more than necessary, threading becomes easier, but the strength of the resulting threads decreases and the joint will have play.<\/p>\n

      2. The Importance of Chamfering and Thread Relief<\/h2>\n
        \n
      • Chamfering:<\/strong> To allow the die to start easily on the shaft, an approximately 45\u00b0 chamfer<\/strong> should be filed or turned on the end of the shaft.<\/li>\n
      • Thread Relief:<\/strong> If the thread must run right up to the end of the shaft (flush with the shoulder), a relief groove should be turned at the base of the shaft during turning.<\/li>\n<\/ul>\n

        3. Mounting the Die in the Die Stock<\/h2>\n
          \n
        • The notch\/recess on the die is positioned to line up with the locking screw in the die stock.<\/li>\n
        • The side screws are tightened to centre and secure the die in the stock.<\/li>\n
        • Because the die has a lead chamfer on both faces, either side can be used.<\/li>\n<\/ul>\n

          4. Step-by-Step Die Threading Procedure<\/h2>\n
            \n
          1. Clamping and Squaring the Part:<\/strong> The workpiece is clamped in a vice. The die stock is positioned exactly square and parallel to the shaft. If the die is started at an angle, the threads will drift axially, shallow threads will form or the die may break.<\/li>\n
          2. Lubrication:<\/strong> Always apply cutting oil to the shaft and die to make cutting easier and improve thread quality.<\/li>\n
          3. Advancing While Breaking Chips:<\/strong> The die is turned with even pressure. After advancing a few turns, the die is turned back following the one turn forward, half a turn back<\/strong> principle to break the chips.<\/li>\n
          4. Cleaning and Checking:<\/strong> Once the required length is reached, the die is backed off, the chips are cleaned from the threads and a suitable nut is used to check that the thread runs freely.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

            Learn how to size the blank, calculate thread clearance, mount the die in the die stock and cut accurate external threads step by step.<\/p>\n","protected":false},"author":4,"featured_media":2454,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[76],"tags":[],"class_list":["post-2491","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/temak.com.tr\/en\/wp-json\/wp\/v2\/posts\/2491","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/temak.com.tr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/temak.com.tr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/temak.com.tr\/en\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/temak.com.tr\/en\/wp-json\/wp\/v2\/comments?post=2491"}],"version-history":[{"count":0,"href":"https:\/\/temak.com.tr\/en\/wp-json\/wp\/v2\/posts\/2491\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/temak.com.tr\/en\/wp-json\/wp\/v2\/media\/2454"}],"wp:attachment":[{"href":"https:\/\/temak.com.tr\/en\/wp-json\/wp\/v2\/media?parent=2491"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/temak.com.tr\/en\/wp-json\/wp\/v2\/categories?post=2491"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/temak.com.tr\/en\/wp-json\/wp\/v2\/tags?post=2491"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}