Drill containing minimum cutting material
Drill and lock screw employed for fastening the same
Drill with interchangeable cutting insert
Cutting tool assembly and a replaceable cutting head for use therein Patent #: 5957631
ApplicationNo. 366214 filed on 08/02/1999
US Classes:408/144, TOOL OF SPECIFIC DIVERSE MATERIAL81/176.2, And means to engage peripheral face of work408/226, Including detailed shank408/230, Spiral channel408/713TOOL HAVING DETACHABLE CUTTING EDGE
ExaminersPrimary: Howell, Daniel W.
Attorney, Agent or Firm
Foreign Patent References
International ClassB23B 051/02
Foreign Application Priority Data1997-05-29 IL
AbstractA cutting tool assembly for rotary cutting operations comprising a replaceable cutting head and a tool shank, having a common longitudinal axis and mating peripheral surfaces. The cutting head has a cutting head mounting portion at a trailing end thereof and the tool shank has a cutting head receiving portion at a front face thereof. The cutting head mounting portion and the cutting head receiving portion of the tool shank each have at least two coupling portions bound by associated peripheral surfaces of the cutting head and the tool shank and mating in shape and dimensions. Each coupling portion has a base surface, a torque transmission wall and a fixation wall, the fixation wall of each cutting head coupling portion having an angular extension smaller than a corresponding angular distance between adjacent extremities of the fixation walls of two different tool shank coupling portions. The cutting tool is assembled by initially disposing the cutting head mounting portion in such a manner relative to the cutting head receiving portion as to insert the fixation walls of the cutting head coupling portions between the respective fixation walls of the tool shank coupling portions, and subsequently rotating the cutting head relative to the tool shank until the cutting head coupling portions fully overlie the corresponding tool shank coupling portions with their base surfaces and torque transmitting walls abutting each other and their fixation walls co-axially interacting in an interlocking male-female fashion, providing thereby the self-clamping of the cutting head on the tool shank.