Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Publication of BE519534ApublicationCriticalpatent/BE519534A/xx
B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
B23B—TURNING; BORING
B23B51/00—Tools for drilling machines
B23B51/04—Drills for trepanning
B23B51/0426—Drills for trepanning with centering devices
B—PERFORMING OPERATIONS; TRANSPORTING
B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
B23B—TURNING; BORING
B23B45/00—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor
B23B45/008—Gear boxes, clutches, bearings, feeding mechanisms or like equipment
B—PERFORMING OPERATIONS; TRANSPORTING
B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
B23Q5/02—Driving main working members
B23Q5/04—Driving main working members rotary shafts, e.g. working-spindles
B23Q5/043—Accessories for spindle drives
B—PERFORMING OPERATIONS; TRANSPORTING
B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
B23B—TURNING; BORING
B23B2251/00—Details of tools for drilling machines