Invention Grant
US08622666B2 Adjustable step drill bit 有权
可调式步进钻头

Adjustable step drill bit
Abstract:
An adjustable step drill bit with a plurality of cutting disks held in compression on a shaft between two stops. The cutting disks may be arranged in various configurations. Spacers may also be provided on the shaft with the cutting disks. A method of drilling a hole utilizing the drill bit to drill a pilot hole and allowing for the drill bit to be used in a pulling technique.
Public/Granted literature
Information query
Patent Agency Ranking
0/0