Helical end mill

Claim 2

A cutting tool, comprising; a shank having a cutting blade receptive slot and next adjacent chip recess formed at a helix angle in the outer periphery thereof, said shank being axially slit through the base of the slot on a like helix angle for diSposing opposite sidewalls of the slot on opposite sides of the slit, and means through the shank and intersecting the slit for closing the slit and drawing the slot sidewalls into clamping engagement with a cutting blade received in the blade receptive slot.

Claim 3

The cutting tool of claim 1 wherein, said shank includes a pair of slots and ship recesses with said slit extending through the base of both slots, and said slit closing means is disposed for drawing opposite sidewalls of both of the slots into clamping engagement with cutting blades received therein.

Claim 4

The cutting tool of claim 2 wherein, said slots are oppositely disposed on said shank and said slit extends therebetween through the axial centerline of the shank.

Claim 5

The cutting tool of claim 3 wherein, said shank is slit axially on a straight radial line and at a like helix angle through the base of said slots.

Claim 6

The cutting tool of claim 1, said slit closing means including a threaded fastener and locking means disposed for engagement with said threaded fastener.

Claim 7

A cutting tool comprising; a shank having a pair of cutting blade receptive slots formed at helix angles in the periphery and on opposite sides thereof, a common opening provided between said slots extending at a like helix angle through the base of each and throughout their full length for disposing opposite sidewalls of each slot on separated parts of the shank, and means for drawing the parts of the shank separated by said opening together for closing the slot sidewalls into clamping engagement with cutting blades received therein.

Claim 8

A cutting tool comprising; a shank having a pair of cutting blade receptive slots formed at helix angles in the periphery and on opposite sides thereof, a common opening provided between said slots extending at a like helix angle through the base of each and throughout their full length for disposing opposite sidewalls of each slot on separated parts of the shank, and means for drawing the parts of the shank separated by said opening together for closing the slot sidewalls into clamping engagement with cutting blades received therein.

Claim 9

A helical end mill, comprising; a shank rotatable about an axial centerline and having cutting blade receptive slots and next adjacent chip recesses formed in the outer periphery thereof on opposite sides and at like helix angles extending from the blade receptive end thereof, said shank being slit at its blade receptive end to provide a separation through the base of each of said slots extending at like helix angles and for disposing opposite sidewalls of each slot on opposite parts of the shank, and threaded fastener means extending between the parts of the shank for closing the base separation in said slots and drawing opposite sidewalls of said slots into clamping engagement with cutting blades disposed therein.

Claim 10

A helical end mill, comprising; a shank rotatable about an axial centerline and having cutting blade receptive slots and next adjacent chip recesses formed in the outer periphery thereof on opposite sides and at like helix angles extending from the blade receptive end thereof, said shank being slit at its blade receptive end to provide a separation through the base of each of said slots extending at like helix angles and for disposing opposite sidewalls of each slot on opposite parts of the shank, and threaded fastener means extending between the parts of the shank for closing the base separation in said slots and drawing opposite sidewalls of said slots into clamping engagement with cutting blades disposed therein.

Claim 11

The helical end mill of claim 7 wherein, said fastener means has shoulder stop engagement with one part of the shank and threaded engagement with the other part, and a setscrew through the terminal end of the shank for engaging and locking the threaded fastener means in its blade-clamping position.