. Electric railway journal . demery dust. The wheel used is 9 in. in diameter, 3in. wide and of Grade Q corundum. The grinding bricksand wheels used on the various machines for differentclasses of work are standardized, six grades and shapeshaving been selected as the most suitable. Practice has shown that when making surface weldsthe Indianapolis welder can work faster than the grindercan follow it up. In order to get the maximum efficiencyout of the welder, therefore, additional grinders havebeen purchased recently. The Atlas grinder is shownon this page. Its field is similar to that of the
. Electric railway journal . demery dust. The wheel used is 9 in. in diameter, 3in. wide and of Grade Q corundum. The grinding bricksand wheels used on the various machines for differentclasses of work are standardized, six grades and shapeshaving been selected as the most suitable. Practice has shown that when making surface weldsthe Indianapolis welder can work faster than the grindercan follow it up. In order to get the maximum efficiencyout of the welder, therefore, additional grinders havebeen purchased recently. The Atlas grinder is shownon this page. Its field is similar to that of the Seymourgrinder but the mechanical method of doing the grind-ing is somewhat different since the main carriage re-mains stationary and the grinding parts move back andforth on guides and are controlled by the wheel andlever in the hands of the operator. The main weightof the machine is on the grinding side and it is readilyderailed by lowering the derailing wheels and raisingthe light side. The first of these machines was re-.
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