. Railway mechanical engineer . Fig. 3—Combination Square Attachment Aids in Setting UpDriving Boxes important. In addition the device makes possible more ac-curate work. Extension Table for Milling MachineIn cases where it is desired to perform a small millingmachine operation on the end of a shaft or long machine partthe extension table and V-blocks, illustrated in Fig. 4, canbe used to good advantage, saving a considerable amount oftime in setting up and assuring an accurate job. As shown,a slot is planed in this extension table or plate square with arib on the under side so that in applyin
. Railway mechanical engineer . Fig. 3—Combination Square Attachment Aids in Setting UpDriving Boxes important. In addition the device makes possible more ac-curate work. Extension Table for Milling MachineIn cases where it is desired to perform a small millingmachine operation on the end of a shaft or long machine partthe extension table and V-blocks, illustrated in Fig. 4, canbe used to good advantage, saving a considerable amount oftime in setting up and assuring an accurate job. As shown,a slot is planed in this extension table or plate square with arib on the under side so that in applying the plate all that. Fig. 4—Extension Table and V-Blocks for Milling Machine is necessary is to tighten up two Y% in. by 2]A in. bolts tohave the table square. Two V-blocks are arranged to slideback and forth in the groove as shown so that they will besquare with the table in any position. This device opens upthe machine to a much wider range of work, as for examplethe boring and facing of rocker arms on the boss ends andother similar machine operations. Reaming Tube Sheet Holes BY GEORGE BREXTONTool Foreman, Grand Trunk Shops, Stratford, Ont. For the rapid and smooth reaming of tube sheet holes,the tool illustrated has been found very satisfactory. Ream-ers formerly used for this work consisted of a roughingreamer of the shell type and a straight flute, finishing reamerfor finishing. The roughing reamer had a taper of -Hi 12 in., but was found to be useless in the hands of acareless operator owing to the fact that there was no gage toindicate the size of the hole which, in many cases, was madelar
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
