Manually rotatable tool
In one aspect of the present invention, a tool assembly comprises a rotary portion and a stationary portion. The rotary portion comprises a bolster bonded to a diamond symmetric, substantially conically shaped tip. The stationary portion comprises a block mounted to a driving mechanism. A compressible element is disposed intermediate and in mechanical contact with both the rotary and stationary portions. The compressible element is compressed sufficiently to restrict free rotation during a degradation operation.
1. A tool assembly, comprising:
a bolster intermediate a shank and a tip;
the tip comprising a substrate bonded to a diamond material comprising a symmetric, substantially conical shape;
the diamond comprising an apex coaxial with the tip, and the diamond being over 0.100 inches thick along the central axis of the tip;
the shank being inserted into a holder or block attached to a driving mechanism; and
the assembly comprises a mechanical indexing arrangement;
wherein the tip comprises a definite number of azimuthal positions determined by the mechanical indexing arrangement, each position orienting a different azimuth of the tip such that the different azimuth impacts first during an operation.
2. The assembly of claim 1 , wherein the shank comprises substantially symmetric longitudinal flat surfaces.
3. The assembly of claim 2 , wherein the shank axially comprises a hexagonal shape.
4. The assembly of claim 2 , wherein the shank axially comprises a star shape.
5. The assembly of claim 1 , wherein the shank comprises an o-ring.
6. The assembly of claim 1 , wherein the shank comprises a spring clip.
7. The assembly of claim 1 , wherein the bolster comprises a puller attachment.
8. The assembly of claim 1 , wherein the bolster is in communication with the driving mechanism through at least one press fit pin.
9. The assembly of claim 1 , wherein the shank comprises at least one catch.
10. The assembly of claim 1 , wherein the indexing arrangement comprises an indexible holder.
11. The assembly of claim 10 , wherein the indexible holder comprises a substantially, axially symmetric geometry.
12. The assembly of claim 1 , wherein the shank is in communication with the holder through a thread form.
13. The assembly of claim 1 , wherein the holder comprises a spring loaded catch.
14. The assembly of claim 1 , wherein the tip is rotationally isolated from the shank.
15. The assembly of claim 1 , wherein the arrangement comprises a racketed cam associated with the holder.