Emery And the Emery Industry a Technical Study of Modern Abrasives And the Deve
Emery And the Emery Industry a Technical Study of Modern Abrasives And the Deve
Alfred Haenig
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, and are particularly valuable in all shops where the turners or planers have to sharpen and set their own tools. These machines are very strongly built, the shaft being of best steel and ground true to fit the bearings, which are of red brass, fitted with ring lubricators and bolted on to the top of the frame. It being very important that the hardness of the ground tools should not be impaired, dry grinding is out of the question, and all these machines are, therefore, fitted with water-feed.... In the newest patterns the top of the frame is dished to form a water-trough, the water being fed automatically by a centrifugal pump from the water-tank inside the hollow frame. The dirty water drains back into the tank, and after depositing the contained solid matter is used over again. For small shops machines of this type are also sup- plied with a support or with a wall-bracket, the water being supplied by means of a dropper mounted above the machine. GEINDING MACHINES 79 This is the primitive form, corresponding to the method used with ordinary grindstones.
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