Drilling a small hole with high accuracy and depth has been a challenge.
The carbide tool for deep hole drilling "Crea Borer" introduced here has successfully solved this problem, which could not be achieved with conventional drilling tools.
It is highly accurate, easy chip disposal, and does not require extensive machine tools. We are confident that this product, which can be mounted on general-purpose machines, will open up new markets.
In this article, we introduce the features and innovativeness of Crea Borer together with one of its developers, Mr. Nishimura of Goal Co., Ltd.

Deep hole machining tool that boasts outstanding roundness and straightness
Can be mounted on general machine tools

The Crea Borer was developed by Hiroshima-based machine tool manufacturer Nishiken Inc. and Osaka-based lock manufacturer Goal Co., Ltd. It can drill holes as deep as 20 times the diameter of the blade, depending on the type of material to be processed.

How innovative is it? It is common to use a spiral drill when trying to drill a deep hole in metal, but this method inevitably results in large misalignments. Chip biting that occurs when drilling holes was also a problem. This is because the conventional stepping motion causes tool breakage, slanted hole, and inaccuracy.

In the first place, a special NC machine tool is essential for deep hole machining. Deep hole drilling is only possible with machines equipped with an internal lubrication system that allows coolant to flow from inside the cutting tool. It must be said that deep hole machining is a very high hurdle for small factories.

The Crea Borer is a tool that solves all these problems. By changing the shape of the cutting edge, the chips are discharged from the bore in a single bundle. No need to clean up chips. The risk of tool trouble has been eliminated.

"One of the groundbreaking features is that deep hole drilling can be performed simply by mounting it on an NC machine tool, which is commonly used in small and medium-sized factories. There is no other machine in the world that can perform deep hole drilling with external lubrication other than the Crea Borer. Above all, it boasts unprecedented accuracy in terms of roundness and straightness. For example, when drilling an 80 mm-length hole with a diameter of 4 mm, the hole would be misaligned by 0.5 mm to 0.8 mm at the end, but with the Crea Borer, the deviation is only 0.01 mm to 0.02 mm. The unique new patented structure suppresses hole inaccuracy and enables advanced deep hole drilling," explains Mr. Nishimura of Goal.

Great responses at trade shows in Germany and Thailand
Resonates deeply with those who have trouble with deep hole drilling

Crea Borer is a product created through collaboration between Nishiken and a lock manufacturer, Goal. Originally engaged in the resharpening of cutting tools, Nishiken gradually began to develop custom-made tools to meet customers' needs. In the process, the company succeeded in developing a tool for drilling straight holes, a precursor to the Crea Borer, at Goal's request. After considering whether this could be released for the general public, both companies succeeded in achieving a groundbreaking deep-hole tool following four-year development period. The tool has already been patented not only in Japan, but also internationally in six countries: the United States, Israel, Germany, Italy, France, and Sweden.

In September 2022, YKT Europe introduced the Crea Borer at a trade show in Germany which the company exhibited, and received a great response. A succession of people said, "This is amazing," and the product was also exhibited using part of YKT Thailand's space at METALEX 2022. In response to the positive feedback received there, it led to full-scale exhibition at METALEX 2023.

"The result was undisputed, a great success, and YKT praised that the Crea Borer attracted a high level of attention and popularity among the products exhibited. The response from visitors involved in on-site machining was very good, and many specific and technical questions were asked. The more people know about the difficulties of deep hole drilling and the more they are struggling with the deep hole machining, the more deeply the innovation of the Crea Borer seems to resonate with them," says Mr. Nishimura.

▲ Exhibit of Crea Borer at METALEX 2023

Cutting tools that also contribute to cost control Supporting the development of world-changing technologies and products

Until now, when drilling deep holes, design has been based on the premise that misalignment would occur. Misalignment was natural, and was the norm. This inevitably required extra parts and increased costs. However, with the Crea Borer, costs can be controlled.

"In the initial stages of development, it tended to be affected by specific conditions, such as rotation speed and depth of cut, but that problem has been solved, and it now possesses a good level of insensitivity performance in a positive sense. The name "Crea Borer" is derived from the word "crea," meaning creation, and the word "borer," which is associated with boring tools. The Crea Borer is a cutting tool that achieves a different level of precision than a drill," says Mr. Nishimura.

Since it is a tool for deep hole machining that has never existed before, we believe that it will encourage various ideas and contribute to the birth of new technologies and products that will change the world in the future.

▲ From left, Mr. Nishimura of Goal and Mr. Watanabe of YKT

GOAL Co.,Ltd.
Yuuki Nishimura
Professional, Production Technology Section
March 1997 Joined Goal Co., Ltd.