The mechanic's tool bookWith practical rules and suggestions for use of machinists, iron-workers and others . serted. This tool will be found a most excellentsubstitute for the multitude of short iron arborswhich are required to be driven into the holes ofwheels and pulleys in order to turn or manipulatethem in the lathe. While we are upon the subject of chucks wemust not forget to mention one that is not per-haps exactly an adjunct to the iron-workers lathe,yet where wooden disks and chucks are to bemade for the purpose of holding patterns or cast-ings to be turned, it will be found very serv
The mechanic's tool bookWith practical rules and suggestions for use of machinists, iron-workers and others . serted. This tool will be found a most excellentsubstitute for the multitude of short iron arborswhich are required to be driven into the holes ofwheels and pulleys in order to turn or manipulatethem in the lathe. While we are upon the subject of chucks wemust not forget to mention one that is not per-haps exactly an adjunct to the iron-workers lathe,yet where wooden disks and chucks are to bemade for the purpose of holding patterns or cast-ings to be turned, it will be found very is simply a plate that screwsupon the lathe-spindle the sameas an ordinary face-plate, as shownin Fig. 20, and in the centre ofthis plate is secured a short, stout,gimlet-pointed screw, which pro-jects from the plate about an inchor so, as may be necessary. ToFig.~20. fit a piece of plank or board to aface plate to make for instance, the chuck rep-resented in Fig. 17, screw the wood upon thischuck and then turn the recess to fit the face-plate,and as this plate is at the time detached from the. LATHE CHUCKS. 81 lathe the wood may be nicely and quickly unscrew the wood from the screw-point andfasten it to the plate by means of screws, put itupon the lathe-spindle and turn and finish up theside where the straps are to fitted. Without thisscrew-point chuck the board would have to be heldto the plate by means of screws; the size of theplate to wThich it is to be fitted taken by calipersand the recess made accordingly, then the boardreversed and fastened again to the plate by meansof the screws and finished up to suit the work. 82 mechanics tool book ECCENTRIC AND CONCENTRIC CHUCKS. Some form of eccentric or concentric chuck isdesirable in all machine shops and almost indis-pensable for the lathes. Of the eccentric chuckstwo forms have been used : the older one, in whichthe work was held by screws passing through lugsor ears, which projected at right angles to
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Keywords: ., bookcentury1800, bookdecade1860, bookpublishernewyo, bookyear1868
