[Technical Information] Causes and Countermeasures for the Enlargement of "Male Threads"
Detailed causes and countermeasures for issues such as excessive cutting around the mouth!
Normal female threads will stop within two rotations of the stop screw gauge. However, issues such as misalignment of the spindle, spindle runout, and the use of worn taps can lead to problems like "enlargement due to excessive cutting at the mouth," "enlargement due to insufficient cutting edge resulting in thread skipping," and "enlargement due to poor feed balance (excessive or insufficient cutting)." This technical document provides detailed information on the causes of "female thread" enlargement and examples of countermeasures. [Contents] ■ Trouble items ■ Main suspected causes ■ Checkpoints and improvement suggestions *For more details, please refer to the PDF document or feel free to contact us.
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basic information
【Trouble Items】 ■ Enlargement due to excessive cutting at the mouth ■ Enlargement due to insufficient sharpness causing thread jump ■ Enlargement due to poor feed balance (excessive or insufficient cutting speed) *For more details, please refer to the PDF document or feel free to contact us.
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For more details, please refer to the PDF document or feel free to contact us.
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Company information
Since our founding in 1923, the YAMAWA Group has been dedicated to researching and developing the highest quality cutting tools—such as taps, dies, and center drills—to meet the ever-evolving technological needs of the market. Guided by the founding spirit of contributing to the progress and development of Japan’s machinery industry, we continue to pursue excellence as specialists in cutting tools. YAMAWA products are trusted across a wide range of industries, from space exploration and aerospace to automotive, shipbuilding, machine tools, home appliances, and IT-related sectors—both in Japan and worldwide. Staying true to our philosophy of providing “Reliable Screw Threads”, we constantly refine our technology and quality management systems. As Japan’s first tap manufacturer to obtain ISO 9001 certification, we take pride in our heritage while striving to advance innovation and deliver cutting tools that support manufacturing around the world.
