It has good chip discharge, reducing damage caused by chip clogging.
The "Center Hole Drill" harmonizes the flow of chips from the cutting part and the counterbore part. It is designed with a groove shape that can sufficiently accommodate and eliminate these chips. Considering the strength of the drill, the length of the cutting part is kept to a necessary minimum, and to compensate for the weak point in strength at the junction of the cutting part and the counterbore part, there is an R at the junction within the back taper of the cutting part. There is also a rich lineup available. 【Features】 ■ Double-edged design with a spiral groove ■ Excellent chip removal, with less damage due to clogging ■ The length of the cutting part is kept to a necessary minimum ■ There is an R at the junction within the back taper of the cutting part ■ A rich lineup is available *For more details, please refer to the PDF document or feel free to contact us.
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【Lineup】 ■ Strong Twist Groove - For relatively tough materials, especially soft materials ■ Weak Twist Groove - Particularly when high precision is required for the center hole or when the workpiece is relatively hard ■ 90° Drill - Simultaneous positioning of the center for drilling and chamfering, chamfering after hole processing ■ Long Shank - Drills suitable for NC machines, MC machines, etc. Available in two series with lengths of 100mm and 150mm ■ Titanium Coating - Excellent wear resistance *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.
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.