The speed is several times that of a gun drill, and the capital investment cost is low.
In the ejector system (double tube system), most of the cutting oil is sent to the head through the gap between the boring bar and the inner tube, reaching the cutting edge area from the outer circumference of the head through small holes in the head, and the chips flow to the discharge port through the inside of the inner tube. Some cutting oil is ejected through the slits of the inner tube, and this ejector effect creates a negative pressure inside the inner tube, allowing the chips and cutting oil to be absorbed. Since it does not require a pressure head for sealing, it is easy to integrate into existing machines such as machining centers and lathes. When not using a bushing, a guide hole is processed as a preliminary step. Intermittent hole processing is also easy. The speed is several times that of a gun drill, and the inner diameter tolerance is around IT10. The capital investment cost is not very high.
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basic information
Head diameter (D) Bar diameter Inner tube model number 18.80 - 19.99 18 0 20.00 - 21.80 19.5 1 21.81 - 24.10 21.5 2 24.11 - 26.40 23.5 3 26.41 - 28.70 26 4 28.71 - 31.00 28 5 31.01 - 33.30 30.5 6 33.31 - 36.20 33 7 36.21 - 39.60 35.5 8 39.61 - 43.00 39 9 43.01 - 47.00 42.5 10 47.01 - 51.70 46.5 11 51.71 - 56.20 51 12 56.21 - 60.00 55.5 13
Price range
P1
Delivery Time
Applications/Examples of results
It is widely used in the automotive and truck industry, processing industry, aerospace industry, shipyards, general industry, mold industry, etc.
Company information
What is "BTA"? It is a question we are always asked when we mention our company name. BTA stands for "Boring & Trepanning Association." The BTA method is one of the cutting processes for creating deep holes in metal, and due to its structure, it excels in chip removal, rigidity, and productivity. As a result, it can perform high-precision deep hole machining at high speeds, and it features an excellent finish. Our company was established in 1959 with the aim of selling BTA deep hole drilling machines and tools. Since then, we have opened new factories, starting with the Kamata factory in Tokyo, to carry out BTA deep hole drilling, followed by the Sagamihara factory and the Kakogawa factory (which later moved to the Akashi factory). Additionally, we began manufacturing BTA deep hole drilling machines and tools at the Kazo factory, and our company has always been a pioneer in the BTA method.