To the best of my knowledge, New Hermes cutter grinders do not allow the cutter to be ground in-place in a removable spindle. Nevertheless, the late Jim Rimmer employed a New Hermes CG-4 in his excellent work (you can see him using it in the DVD "extras" in the Richard Kegler film Making Faces on Rimmer's work).
The New Hermes CG-10 and CG-30 are different machines which seem much less substantial (they lack the right-side support for the shaft on which workholding head pivots). The CG10, apparently, could only grind at three angles (14, 30, and 45 degrees).
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