. Railway mechanical engineer . Fig. 8—Shoe and Wedge Planer Chuck The boxes are then placed on a planer and machined to astandard size, using tlie gage shown in Fig. S, a separate gagebeing provided for each class of locomotive. The drivingl)Ox is then stencilled to show the size between shoe and wedgefaces and delivered to the boring mill, where it is bored toactual size, a universal chuck being used to center the box. It will be noted that the gage illustrated in Fig. 5 is a stepgage, each step decreasing by ]4, in. This arrangement is toprovide for light repairs when driving boxes are not
. Railway mechanical engineer . Fig. 8—Shoe and Wedge Planer Chuck The boxes are then placed on a planer and machined to astandard size, using tlie gage shown in Fig. S, a separate gagebeing provided for each class of locomotive. The drivingl)Ox is then stencilled to show the size between shoe and wedgefaces and delivered to the boring mill, where it is bored toactual size, a universal chuck being used to center the box. It will be noted that the gage illustrated in Fig. 5 is a stepgage, each step decreasing by ]4, in. This arrangement is toprovide for light repairs when driving boxes are not re-brassed but simply trued up. The tool is set to whatever stepthe box will true up at and stencilled 1, 2, 3, 4, 5 or 6, as thecase may be. A chart is now made out by the wheel foreman,. Fig. 9—Driving Box Shoe Set Up Ready for Planing as illustrated in Fig. 6, showing the locomotive number, eachdriving box number, and the gage number to which it wasplaned. Two charts are shown in the illustration, one beingfor a set of driving boxes rebrassed and planed to standardsizes, and the other showing the sizes to which a set of lightrepair driving boxes were planed without being chart after being made out is delivered to the man who()j)erates the shoe and wedge planer. While the driving boxes are being planed, the shoes andwedges are delivered to a sensitive drill, which is placed nearthe shoe and wedge planer. The jig ^, Fig. 7, is then usedin drilling the holes which are to hold the shoe or wedge incorrect position for planing. As shown in the illustration. Decembeh, 1920 RAILWAY MECHANICAL ENGINEER 791 the jig consists of a metal bar with a hardened steel bushingin eitlier end to guide tlie }i-in. drill. These bushings are12 indies apart, as are the two
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
