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The New Zealand Railways Magazine, Volume 2, Issue 10 (February 1, 1928)

The Floor Grinder

The Floor Grinder.

In many shops where tool grinders have been installed in the tool room, floor grinders have also been set down in the machine shops. The setting down of the floor grinders has induced machine operators to touch up and ultimately grind their own tools. Possibly, a machine operator will claim that after he touches up a certain tool it cuts much better. This might possibly be true, but it does not in any way discredit the tool room system. It shows only that the best (the correctly ground tools) have not been selected in the make up of the shops standard tools.

The question now arises as to how to arrive at a good general standard. Theoretically, this can be taken from the makers' charts; but in the main, a workable standard must also be determined in the shops where the tools are to be used and, where the material to be machined is known, and the machining operations understood. Knowing these things and, with the gridance of tool grinding charts, an excellent standard set of tools should follow. Should tools, after correct grinding be interferred with on the floor grinder, the chances are that the good done by the tool-room grinding will be undone by that of the machine shop. This practice should be avoided and the floor grinders kept within their legitimate spheres of usefulness.