[TheForge] OT: Deep hole spot facing

[Andrew Vida]

I need to produce a reasonably accurate spot face at the bottom of a 
deep (~ 2.5") 1/4" diameter hole.  Furthermore, I would very much like 
to relieve the corner in order that a precision ground facing shim (or 
washer) will seat solidly and precisely normal to the axis of the bore.  
To wit:


________________________________________________________________
| |
|       __________________________________________________________|
|     C_ <--Relief
|_____|<.
|            \
|_____     \
|      _|<-Spot-faced surface
|    C___________________________________________________________
| |
|_______________________________________________________________|

The only spot-facing tools of which I am aware are for shallow holes and 
often have pilots.  What I would ideally like is a .250" reamer, face 
cutting, with the relief provision ground into the face. Single 
operation to ream, face, and relieve.

Anyone know who might make such cutters?  I know I can make a boring bar 
to do this, but for some reason I seem to welded myself to the idea of 
this approach.

Thanks.

     -Andy