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  6. Step Drill "Black Hole"

Step Drill "Black Hole"

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SKK-412・SKK-422 (Sanki Kogyo)

last updated:Apr 30, 2026

三喜工業 本社
三喜工業 本社
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The excellent black titanium offers top-class heat resistance, wear resistance, and durability in the industry. Experience the overwhelming sharpness.

The stepped drill "Kokuwan" features a titanium aluminum nitride coating that provides excellent heat resistance and wear resistance, making it suitable for high-speed cutting. It is made from cobalt high-speed steel, which enhances its durability. We have conducted drilling durability tests. Please download the PDF to check the results! *For more details, please refer to the materials. Feel free to contact us with any inquiries.

    Work tools
黒穿412&422.png

Step Drill "Black Hole"

黒穿412&422.png
黒穿412&422.png 黒穿412.png 黒穿422.png
  • Related Link - https://www.sankikogyo.co.jp/tools_category/e-tool…
  • Special site - Product/service details - https://pr.www.ipros.com/sankikogyo/product/

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basic information

Model Number: SKK-412 Sizes: 4, 5, 6, 7, 8, 9, 10, 11, 12 Model Number: SKK-422 Sizes: 4, 6, 8, 10, 12, 14, 16, 18, 20, 22

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Applications/Examples of results

[Usage] Stainless steel (up to 3mm), iron (up to 6mm), aluminum (up to 3mm), plastic, resin, wood, etc.

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Model number overview
SKK-412 Size of each section: 4・5・6・7・8・9・10・11・12
SKK-422 Size of each section: 4・6・8・10・12・14・16・18・20・22

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Step Drill "Black Hole"

Step Drill "Black Hole"

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三喜工業

三喜工業 本社

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Sankei Industrial Co., Ltd. specializes in duct materials and related equipment, and also manufactures products in-house. We respond to customer requests with our extensive experience in handling various inquiries and our consulting capabilities backed by unique know-how. Please feel free to contact us when you need assistance.

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