Popular science monthly . s wassecurely held against the cylinder base-flange by means of clamping straps. Itis held away from the base-Hange bytubular spacers while the clampingstraps were separated at the top by hardwood spacer blocks. The boringtool was a specialiron casting havingan inserted cuttingtool made of toolsteel. The cutterwas held in place l)ya and wasinserted in a drillhole made to re-ceive it. The bor-ing tool was .se-curely clamped tothe intermediateportion of the bor-ing-bar by a set-screw,was made to smooth cylinder and the boring-bar guide se-curely clam[)ed ther
Popular science monthly . s wassecurely held against the cylinder base-flange by means of clamping straps. Itis held away from the base-Hange bytubular spacers while the clampingstraps were separated at the top by hardwood spacer blocks. The boringtool was a specialiron casting havingan inserted cuttingtool made of toolsteel. The cutterwas held in place l)ya and wasinserted in a drillhole made to re-ceive it. The bor-ing tool was .se-curely clamped tothe intermediateportion of the bor-ing-bar by a set-screw,was made to smooth cylinder and the boring-bar guide se-curely clam[)ed thereto, it will be appar-ent that the boring-bar center line hadto coincide with that of the cylinder. The cutting tool is set for the desireddepth of cut, leaving about 1/64 in. ofstock on a side to be removed with thereamer. The lathe is started on the backgears and the cylinder-block is movedback slowly to meet the cutting tool bymoving the tool UAMPiHG SfAAPS5PAC£R BLOCKSCrUNDCK CASTING ^^^ ij SORING BAD OUlOeaORiNG BAR. Boring-Bar Guide and Method of Fasten-ing It with Clamps A special reamerthe cylinder afterthe boring cut was completed. This wasmade of a tool steel disk having sixteencutting teeth milled on it and forced ona cast-iron bushing which was a goodfit on the boring-bar. The boring-barwas machined from a piece of machinerysteel \]A. in. in diameter. In assembling the parts, the first stepwas to put the centering disk into thecylinder interior and then locate thecylinder carriers and boring-bar centering disk was an easy push fitin the cylinder interior and, of course,held the boring-bar in the center. Whenthe cylinder carrier was clanipcd to thebase flange of the cylinder-block, andthe centering disk was backed out andits place taken by the boring tool,the cut started straight. Absoluteparallelism of the boring-bar with thecylinder walls was secured by i)utlingthe centering disk at the head end ofthe cylinder and then adjusting thicentering sc
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1872
