Toolholder

Claim 2

A toolholder assembly for a machine tool having a spindle with an axis and a slide movable relative to said axis and the slide having a mounting surface, said toolholder assembly including, in combination, a holder base, means to secure said holder base to the slide mounting surface, said holder base having a cylindrical first bore with an axis in a reference plane passing through the axis of the spindle and parallel to the slide mounting surface, a cylindrical shank tool holder fitting within said cylindrical first bore and having a forward and a rearward end, tool mounting means unitary with said forward end of said toolholder shank to hold a tool for operating on a workpiece in the spindle, a first keyway in said holder base, a second keyway in said cylindrical shank, first gauge means to establish a first predetermined length between the cutting tip of the tool carried in said mounting means and a point on the slide, and key means acting between said keyways to establish a tool in said mounting means perpendicular to or slightly off-set to the axis of the spindle.

Claim 3

A toolholder assembly as set forth in claim 1, including said key means fitting into said keyways in alternative positions to establish a tool offset on either side of a perpendicular to the spindle axis.

Claim 4

A toolholder assembly as set forth in claim 2, wherein said key means is reversible to effect the different tool offsets.

Claim 5

A toolholder assembly as set forth in claim 2, including a key in said key means reversible end for end to effect the different tool offsets.

Claim 6

A toolholder assembly as set forth in claim 2, including a key with an unsymmetrical cross-section reversible end for end to effect the different tool offsets.

Claim 7

A toolholder assembly as set forth in claim 5, wherein said unsymmetrical key is off-set approximately 2* to permit the key to be reversed end for end and thus establish side clearance for a tool in the tool mounting for a slide position on either side of the machine tool spindle.

Claim 8

A toolholder assembly as set forth in claim 2, including two keyways in one of said shank and said holder base with said two keyways being diametrically opposed.

Claim 9

A toolholder assembly as set forth in claim 1, including means mounting said first gauge means on said rear end of said shank, said first gauge means comprising a tapped hole in said shank parallel to the axis thereof, and means including threaded means in said tapped hole and co-acting with said slide to establish said first pre-determined gauge length.

Claim 10

A toolholder assembly as set forth in claim 1, including first and second bores in said shank parallel to the axis thereof, a tapped hole in the outer end of each said shank bore, a friction compression fitting threadable in either of said tapped holes, a first gauge block secured on the rear of the slide, and a first gauge rod slidably securable alternatively in either of said first and second bores by said compression fitting to establish said first predetermined gauge length between the end of said first gauge rod engaging said first gauge block and the cutting tip of the tool carried in said tool mounting, said first gauge rod being alternatively disposed in said first or said second bore depending upon the mounting of said cylindrical shank in the said holder base in either of two positions approximately 180* apart depending on whether the tool-holder mounting is positioned for up-cutting or down-cutting.

Claim 11

A toolholder assembly as set forth in claim 9, wherein said first gauge rod may be received entirely within said shank bore when not in use as a gauge in order to protect said gauge rod.

Claim 12

A toolholder assembly as set forth in claim 1, including two longitudinal slots in said holder base substantially diametrically opposed relative to said shank axis to establish said holder base in two parts with one part being a cap removably secured to the other part by clamping screws, said cap being completely removable and said toolholder shank being removable in a direction transverse to the axis thereof to permit said holder base to remain secured to the slide and to thus not destroy the preset gauge distance of said cylindrical shank toolholder relative to the spindle axis.

Claim 13

A toolholder assembly as set forth in claim 1, including second gauge means acting between said holder base and said slide to establish a second predetermined gauge distance between the axis of said cylindrical shank and a point on the slide.

Claim 14

A toolholder assembly as set forth in claim 12, including a gauge bore in said holding base extending in a plane perpendicular to said shank, a threaded aperture in the outer end of said gauge bore, and means including threaded means in said threaded aperture and coacting with the slide to establish said second predetermined gauge distance.

Claim 15

A toolholder assembly as set forth in claim 13, including a second gauge block secured on the slide, a friction compression fitting threaded in said threaded aperture, a second gauge rod slidably securable in said gauge bore by said compression fitting to establish said second pre-determined gauge distance between the end of said second gauge rod engaging said second gauge block and the axis of said cylindrical shank.

Claim 16

A toolholder assembly as set forth in claim 14, including said gauge bore extending through said holder base, and a threaded aperture in the two outer ends of said gauge bore to alternatively receive said friction compression fitting for alternative disposition of said second gauge rod depending upon alternative dispositions of the holder base on the slide.

Claim 17

A toolholder assembly as set forth in claim 1, including a dovetail tool mounting means on the forward end of said cylindrical shank, a ground planar surface on said front end of said mounting means containing the axis of said cylindrical shank to enable a flat gauge block to lie in contact with said ground planar surface and a tip of a cutting tool in the dovetail mount to establish the proper position of the tool on the axis of said cylindrical shank.

Claim 18

A toolholder assembly as set forth in claim 16, including a stop block fastened on the bottom of said tool mounting means, and an adjusting screw threaded in a threaded aperture in said stop block to adjustably engage the bottom of a dovetail tool in said tool mounting means.

Claim 19

A toolholder assembly as set forth in claim 1, including a cut-off toolholder mounted on said tool mounting means including first and second recesses on opposite sides of the front end of said toolholder mount, each of said recesses adapted to receive an insert, tapped apertures in the bottom of said toolholder mounting means and extending to each of said recesses, tightening screws in said tapped apertures extending into said recesses, a tapering wedge wall on the upper surface of each said recess, a wedge engaging said tapering wedge wall and engaging a surface of said insert, said insert being positioned between said wedge and the inner ends of said tightening screws, said insert having a pocket on one side thereof to receive a flat thin cut-off tool, a cap secured to said insert to retain said cut-off tool in said pocket, the said tightening screws and tHe position of said wedge being movable to adjust the cutting tip of said cut-off tool on said axis of said cylindrical shank, said insert being symmetrical to be reversed end for end for two different positions of said cut-off tool relative to said cylindrical shank axis for a particular recess and being positionable in either recess for a total of four positions of said cut-off tool relative to said cylindrical shank axis.

Claim 20

A toolholder assembly as set forth in claim 1, including a cross-shaft on the front of said tool mounting means having an axis in a plane perpendicular to said shank axis, and a circular cutting tool mounted on said cross-shaft.

Claim 21

A toolholder assembly as set forth in claim 1, including a flat toolholder mount on said toolholder mounting means including first and second recesses on opposite sides of the front end of said toolholder mount, each of said recesses adapted to receive a flat tool of the lathe type, tapped apertures in the bottom of said toolholder mounting means and extending to each of said recesses, tightening screws in said tapped apertures extending into said recesses, a tapering wedge wall on the upper surface of each said recess, a wedge engaging said tapering wedge wall and engaging a surface of a flat tool which is positioned between said wedge and the inner ends of said tightening screws to adjust the cutting tip of said tool on said axis of said cylindrical shank.

Claim 22

In combination with a machine having a spindle and a slide with a mounting surface, the provision of, a holder base, means to secure said holder base to said slide, said holder base having a cylindrical bore with an axis in a reference plane passing through the axis of said spindle and parallel to said slide mounting surface, a cylindrical shank tool holder fitting within said cylindrical bore and having a forward and a rearward end, toolholder mounting means unitary with said forward end of said toolholder shank and first gauge means on said rear end of said cylindrical shank, said first gauge means comprising a second bore in said shank parallel to the axis thereof, a tapped hole in said bore, a friction compression fitting threaded in said tapped hole, and a gauge rod slidably securable in said second bore by said compression fitting and co-acting with the slide to establish a first predetermined gauge length between the cutting tip of the tool carried in said tool mounting and a point on the slide.

Claim 23

In combination with a machine having a spindle and a slide with a mounting surface, the provision of, a holder base, means to secure said holder base to said slide, said holder base having a cylindrical bore with an axis in a reference plane passing through the axis of said spindle and parallel to said slide mounting surface, a cylindrical shank tool holder fitting within said cylindrical bore and having a forward and a rearward end, toolholder mounting means unitary with said forward end of said toolholder shank and first gauge means on said rear end of said cylindrical shank, said first gauge means comprising a second bore in said shank parallel to the axis thereof, a tapped hole in said bore, a friction compression fitting threaded in said tapped hole, and a gauge rod slidably securable in said second bore by said compression fitting and co-acting with the slide to establish a first predetermined gauge length between the cutting tip of the tool carried in said tool mounting and a point on the slide.