End mill
OwnerZadok H. Levyinventor
Life of this patent
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Abstract
An improved end mill which is less subject to breakage in that its helical flutes in the cutting protion are tapered in depth from a maximum proximate the cutting tip to a minimum proximate the transition to the end mill's shank portion.
Claims8
An end mill comprising a cylindrical rod having a smooth cylindrical shank portion of circular cross-section and an integrally formed cutting portion with at least one helical flute extending from the transition between said shank portion and said cutting portion to the end of said cutting portion, the depth of grind of said flute being linearly tapered from a minimum depth proximate said transition to a maximum depth proximate said end of said cutting portion.
An end mill of the type comprising a steel rod of a predetermined length having a smooth, cylindrical shank portion adapted to be received in a tool holding chuck of a milling machine and a cutting portion extending from the end of said rod, said cutting portion having at least one helical flute extending over the length thereof and terminating in a radial cutting edge, said end mill characterized by having the grinding depth of said helical flute varying linearly along the length of said cutting portion from a maximum depth at said one end to a minimum at a location in said cutting portion displaced from said one end a predetermined distance toward but short of said smooth shank portion.
Dependencies are inferred from the claim text.