US2233724A - Cutting tool - Google Patents

Description

CUTTING TooL Filed Sept. 22, 1939 The machined frusto-conical portion 34 of the shaft'z rests on the balls 5U and serves as an adjusting surface therefor.

The screw threaded shaft 28, on its end ad- 6 jacent the lower surface of the upper arm 23 of the bifurcated end of the shaft 22, carries in screw threaded engagement a retainer 54 which has an arcuate portion 55 to accommodate the balls 50. The periphery of the retainer 55 is cylindrical,

l as shown at 5'6, and carries at its lower end a. right angular portion 51 which forms an L shaped abutment to seat in a correspondingly shaped recess 60 in the upper face of the cutting disk 4|.

l Referring more particularly to Figure 4,theup per clamp l carries a pointer 63 which is adaptedv4 for registration with an index @d which is scribed on the adjacent portion of the end of the shaft i 2.

y From the foregoing, it will be noted that the cutting disk di is entirely supported by anti-friction ball bearings. This provides free turning of the cutting disk si, which is essential to avoid even momentary stoppage or reduction. of speed of rotation of the latter which, at high cutting speeds would cause burning of the cutting edge t3 of the cutting tool, thereby necessitating rex placement.

In addition, the holder provided bythe elements 6 and i and cooperating instrumentalities, a0 provides rapidand easy changing of the cutting angle of the cutting disk,

The device of the invention may be employed for turning, boring, planing, etc., and due to the construction and arrangement of the parts. pro- @5 vides a cutting disk having not only an increased life of service, but also one which permits greatly increased cutting speeds.

\While we have shown and described one specinc embodiment of the present invention, it will be seen that we do not wish to be limited exactly thereto.since various modifications may be made without departing from the scope ofthe inven- 6 tion, as dened by the following claims.

We claim:

1. A rotatable cutting tool comprising a bifurcated shaft, a spindle extending between the bifurcations of said shaft, an anti-friction bearl0 ing-.carried by said spindle, and a rotatable cutting diskmounted on said anti-friction bearing.

` furcated shaft, a spindle extending between the bifurcations of said shaftran anti-friction bearing carried by said spindle, a cutting disk mounted on said anti-friction bearing, an anti-friction bearing disposed between said rotatable cutting 25 disk and said spindle, and means for adjusting said last-named anti-friction bearing.

4. A rotatable cutting tool comprising a bin furcated shaft, a spindle extending between the bifurcations of said shaft, axially aligned sets of anti-friction bearings carried by said spindle between the said bifurcations, andV a rotatable cutting disk mounted between the said sets of antifx'iction bearings.

BRYANT BANNISTER. GEORGE c. GREENWOOD.

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