At 01:18 PM 2/18/00 -0800, Erik Stainsby wrote:
>2) shaping carbide tipped tools: the local Cuturi vendor
>tried to sell me a "green wheel" for reworking the carbide
>tips on my bench grinder.
>
>What is the composition of such a wheel? Does it provide any
>advantage over the aluminum oxide types?
A green wheel is silicon carbide. That is what you want for sharpening
carbide tools, the aluminum oxide will not cut the carbide well and will be
consumed quickly.
>My composition is likely to be a standing figure, and it
>will not be possible to lay it down while working.
It is possible to lay it down with proper rigging. Does the symposium
provide suitable materials handling equipment and assistance?
>you recommend getting useable blocks off from above the
>shoulders/beside the head? Boring through from back to front
>where neck meets shoulder, then using wedges vertically
>beside the head and horizontally above the shoulder seems a
>bit dicey, but is what I have seen illustrated in texts.
You have to work with the grain of the marble in splitting large chunks.
That will help determine the approach. One way is to make slices with a
diamond saw, 3" apart, and split off the pieces with a point chisel- but be
very careful if you're working on a vertical block with a diamond saw, the
saw can grab and jump. I once watched someone cut his work smock from
hither to yon when a 9" saw jerked out of a 5 ton block of marble. He
wasn't hurt, but he did open his eyes a tad...
____________________________________
Walter S. Arnold * walter[AT]stonecarver.com
Gallery: http://www.stonecarver.com
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