. Railway mechanical engineer . d brass, is $4,331, or thesaving made by the use of the second-hand brass. The method followed in handling a set of boxes from thetime they are taken from the wheels to the time they areready to go on again is as follows: First: Mark all boxes and brasses and press out the brasseswith a hydraulic press. Second: Remove the cast iron hub plates by drilling offthe heads of the plugs which hold the plates in place. Third: Fit new brasses, or shim and close the old ones. Fourtli: Fit the old brasses or lay off the new brasses. Fifth : Shape the edge of the brasses on
. Railway mechanical engineer . d brass, is $4,331, or thesaving made by the use of the second-hand brass. The method followed in handling a set of boxes from thetime they are taken from the wheels to the time they areready to go on again is as follows: First: Mark all boxes and brasses and press out the brasseswith a hydraulic press. Second: Remove the cast iron hub plates by drilling offthe heads of the plugs which hold the plates in place. Third: Fit new brasses, or shim and close the old ones. Fourtli: Fit the old brasses or lay off the new brasses. Fifth : Shape the edge of the brasses on a Newton verticalmiller. (See Figs. 1 and 2.) Sixth: Press the brasses in the boxes at 20 to 40 tonspressure. Seventh : Plane the boxes. Eighth: Fit and drill the cast iron hub plates and drill theboxes for the brass plugs. Ninth: Face and bore the boxes to fit the journals. Notethe driving box chuck in Fig. 3. This is a universal chuck,and was built in this shop. f ps jwam —**-■— • - J ^^ A ■ TT( f <— ■—■. Fjq. 1—Milling Driving Box Brasses Fig. 2—Milling Driving Box Brasses Fig- 3—Boring Driving Brasses with Universal Chuck consists of three machinists, one apprentice, one helper and Tenth: Place the cellars in the driving boxes and truck one handy-man. There are one machinist and a helper on the them to the wheels. bench, who strip all boxes and do the floor work, such as This gives the complete working order in which driving laying off the brasses, pressing them in, and fitting the cellars. boxes are handled at this place. The following is the time it Whenever a cellar is loose in the box, it is tightened by riveting would take one man to complete a set of six driving boxes, a liner of the necessary thickness (very seldom more than The time mentioned in the first part of this article is our average 1/16 in.) on one side of it. Cast iron hub plates are used time for nine months, using two boring mills on box work. on driving boxes instead of babbi
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
