. Locomotive engineering : a practical journal of railway motive power and rolling stock . in the average blacksmith shopis generally distinguished by an air ofloneliness and crude petroleum; but inthis shop it was made to help out in anovel way, by having a rig applied bywhich lag-screws, joint-bolts and all otherrough bolts requiring smooth ends werequickly chamfered, even to a point ifnecessary. Fig. 3 shows this device in position onthe table of the 30-inch drill, where it wasin operation. A shank A, having a socketto receive the bolt head, passes througha hole in the table, and receives i
. Locomotive engineering : a practical journal of railway motive power and rolling stock . in the average blacksmith shopis generally distinguished by an air ofloneliness and crude petroleum; but inthis shop it was made to help out in anovel way, by having a rig applied bywhich lag-screws, joint-bolts and all otherrough bolts requiring smooth ends werequickly chamfered, even to a point ifnecessary. Fig. 3 shows this device in position onthe table of the 30-inch drill, where it wasin operation. A shank A, having a socketto receive the bolt head, passes througha hole in the table, and receives its mo-tion to raise and lower the bolt to andfrom the revolving cutter by means of thelever B, which is fulcrumed to the under-side of the table. The sockets for difTer-ent-sized bolt-heads are all made to fit theone shank, and are secured to same bythe bolts shown at 0. The cutter for this device is carried ina head O, which is fitted to the socket onthe drill spindle; it is made of J^xi^-inchsteel, and secured to a lug on the head byone bolt. As will be seen in the sketch, all move-. ments of the boll are positive, with nochance for it to avoid the cutter, which,by the way, is always run dry—no lubri-cant used whatever. The cutters are keptin quantities, so that a sharp one can beat once substituted for one dulled by thedry ordeal; this policy keeps the tool mov-ing, without any stops for grinding, untilthe job is completed, when the cutters areall put in shape again. The high speed at which the machineis run, and also the cutting being donedry, are both at variance with what amachinist would call rational practice;but there are lots of our old theories go-ing to pieces when tackled by the record-makers. O. H. R. LOCOMOTIVE ENGINEERING. 161 The Deceptive Performance Sheet. Every railroad man who has paid atten-tion to methods of making up mileagesheets, knows that the comparison of thestatements made by different roads is de-ceptive. The Master Mechanics Asso-ciation have s
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroa, bookyear1892
