The artizans' guide and everybody's assistant : containing over two thousand new and valuable receipts and tables in almost every branch of business connected with civilized life, from the household to the manufactory . Fig. 3. Fig. 4, at a, is intended to show the method of ascertaining th*proper angle, that of sixty degrees, at whidi such saws ?t/ioidil hk,iilcd. The diagram being requires but little furtlKi*elucidation here. A quarter circle with lines radiatin from thecentre towards the circumference is represented near the verge ofthe segment of a circular saw. The lower
The artizans' guide and everybody's assistant : containing over two thousand new and valuable receipts and tables in almost every branch of business connected with civilized life, from the household to the manufactory . Fig. 3. Fig. 4, at a, is intended to show the method of ascertaining th*proper angle, that of sixty degrees, at whidi such saws ?t/ioidil hk,iilcd. The diagram being requires but little furtlKi*elucidation here. A quarter circle with lines radiatin from thecentre towards the circumference is represented near the verge ofthe segment of a circular saw. The lower part corresponds withtho level of the horizon, and the higher part iit ItO corresponds Machinists, engineers, &c., receipts. 219 with the zenith or meridian, where the sun appears at half-way up is 45° ; look up a little higher and you willfind 60» indicated by the radiating line which runs parallel withthe angle of the tooth of the saw and this is the guide you mustfollow in filing. The same rule is seen applied to a straight mill. ^ Many good authorities contend that mill saws should in on castfie^set the instrument commonly used for that purpose, but 220 MACHINISTS, ENGINEERS, &C., RECEIPTS. that in lieu thereof the teeth should be spread out at the pointswith the swage or upset to a sufficient extent to permit the body ofthe saw to operate without binding. Both instruments require tobe skilfully handled, and the swage, when used in this way, hasproved itself equal to every emergency without the risk of break-ing the teeth. It would be quite safe to say that the saw-set shouldonly be used on saws of this description with the most extremecaution and care. Every manufacturer, however, has his ownopinion, and consequent practice on the subject, some contendingthat one way is right and the other directly the reverse. To Repair Fractured Circular Saws.—The best way to dothis is to drill a small round hole at the termination of the crack,which effectual
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Keywords: ., bookcentury1800, bookdecade1870, booksubje, booksubjecttechnology
