| Show Cut Metal With Smooth Disks I Not so 10 very long ago the discovery was made that metals could be sawed easier and quicker with rapidly revolvIng revolving Ing smooth disks of ot ste steel 1 than with Ith toothed circular saws It was found that the cutting was done b bj by the heat heal generated b bj by the friction of the edge of at the disk against the metal metal The metal Is melted at the point of ot contact con can tact while the steel of the disk being cooled b bj by the air does not reach leach the melting point The disks need nc ncI I sharpening and do not wear out sc Be quickly as 8 the toothed saws heretofore used for cutting metal The rhe faster th the disk re revolves the greater the amount of at heat generated and the quicker the job Popular job SC Science ence Monthly |
