Twist drill for metal machining

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9844819
SERIAL NO

14900252

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A long twist drill includes a shank and a drill body having a drill tip (16). The twist drill has a length L and an outer diameter D, and has a cemented carbide or high speed steel substrate and a coating of at least one layer. The quota L/D is at least 16. The twist drill has two cutting segments at the tip and two flutes chip. The twist drill is provided with holes for fluid opening in the tip. The twist drill has an axial web thinning angle GAA, which is 40 to 50°. The twist drill further has a web that back tapers such that a web diameter gets smaller in a direction away from the tip towards the shank within an axial distance.

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Patent Owner(s)

  • SECO TOOLS AB

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bjork, Anders Soderkoping, SE 28 688
Carlsson, Christian Skarblacka, SE 6 22
Nordberg, Par Soderkoping, SE 1 9

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