The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 19, 2017
Filed:
Jun. 09, 2014
Applicant:
Seco Tools Ab, Fagersta, SE;
Inventors:
Assignee:
SECO TOOLS AB, Fagersta, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23B 51/02 (2006.01); B23B 51/06 (2006.01);
U.S. Cl.
CPC ...
B23B 51/06 (2013.01); B23B 51/02 (2013.01); B23B 2222/28 (2013.01); B23B 2222/32 (2013.01); B23B 2228/10 (2013.01); B23B 2251/04 (2013.01); B23B 2251/14 (2013.01); B23B 2251/402 (2013.01); B23B 2251/422 (2013.01); Y10T 408/9097 (2015.01);
Abstract
A long twist drill includes a shank and a drill body having a drill tip (). 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.