I was pondering how to provide the outer groves. The trouble was it hat to be precise and I could not put to much strength on the stuffing box. The bore is 2 mm in diameter and the inner diameter of the grove would be 3,1mm; 0.5mm material remained (0.02 inch).
I came up with this. I use a hand grinder. I made a jig to support my hand grinder. The tool holder of the lath was replaced by this jig. A 1mm diameter cutter was installed in the grinder. The grove dimensions are diameter 3,2mm, wide 1.8mm.
I came up with this. I use a hand grinder. I made a jig to support my hand grinder. The tool holder of the lath was replaced by this jig. A 1mm diameter cutter was installed in the grinder. The grove dimensions are diameter 3,2mm, wide 1.8mm.
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