. The Locomotive . hat shownin Fig. 7, on page170, is necessary. The center lines ofthe engine shaftand of the cylinderare carefully laidout at right anglesto each other onthe template andths bolt holes are then located from these center lines. The location ofthe bolt holes in the bed plate of the engine is secured either by directmeasurement or from the makers. The length of the foundation boltsshould be, if possible, thirty or more times their diameter. That is tosay, a one-inch bolt should be thirty inches or more in length. This isthe length of the bolt that is within the foundation and to
. The Locomotive . hat shownin Fig. 7, on page170, is necessary. The center lines ofthe engine shaftand of the cylinderare carefully laidout at right anglesto each other onthe template andths bolt holes are then located from these center lines. The location ofthe bolt holes in the bed plate of the engine is secured either by directmeasurement or from the makers. The length of the foundation boltsshould be, if possible, thirty or more times their diameter. That is tosay, a one-inch bolt should be thirty inches or more in length. This isthe length of the bolt that is within the foundation and to it shouldbe added the necessary length to extend above the foundation to passthrough the grouting, the bed plate of the machine, and the nut andwasher above. There is considerable advantage in having the boltsextend an inch or two above the level theoretically required, for in-accuracies of setting or measurement may cause this extra length tobe of considerable value. If, after the engine is finally set, the bolts. 170 THE LOCOMOTIVE. [April, extend beyond the nuts, the protruding ends may readily be removedwith a hack-saw. The holding-down bolts should not be rigidly fastened in thefoundation because, for one reason, the bolt holes in the bed-plate
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