. Railway age gazette . onbeing given to the fact that machine tool manufacturers invariablyequip their machines with motors of sufficient power to meet themaximum output of which the machine is capable. For e-xample,axles, piston rods, etc., are purchased rough turned, with aminimum amount of metal left for finishing; this may be con-sidered the linished product of the rolling mill whereas it is therough stock of the railroad shop. It is evident, therefore, thata lathe for finishing any of these parts would not require as highpowered motor equipment as one for service in a rolling sa
. Railway age gazette . onbeing given to the fact that machine tool manufacturers invariablyequip their machines with motors of sufficient power to meet themaximum output of which the machine is capable. For e-xample,axles, piston rods, etc., are purchased rough turned, with aminimum amount of metal left for finishing; this may be con-sidered the linished product of the rolling mill whereas it is therough stock of the railroad shop. It is evident, therefore, thata lathe for finishing any of these parts would not require as highpowered motor equipment as one for service in a rolling same reasoning was applied to group drive motors. Theaggregate power required by all tools in a group was determinedand consideration was given to the intermittent operation of thetools in the group; motors were then installed of approximately25 to 30 per cent of the total power when all tools were inoperation at the same time. This can safely be done on accountof the large overload capacity of alternating current motors;. Interior of the Engine Room further, the result of observation of motor operation in shopsvery similar to the Billerica shops has demonstrated that thispractice is good. Group drive motors are carried on steel brackets and shelvesriveted to the steel columns supporting the shop roof. This ar-rangement leaves a clear way over the wall benches and in thebench aisle, permitting the use of I-beam, trolley hoists in thisspace without the interference of the belts. The line shaft is 2 15/16 in. diameter, running at 200 r. p. boxes fitted with Hyatt roller bearings; it is put up to true line and level, throughout the full length, being sectioned for eachgroup of machines. Sections average 44 ft. in length and aremade up of two or more pieces of shaft 22 ft. long. Flangecouplings are used and a space of J4 in. has been left between theends of sections; provision has been made for connecting thewhole or a part of each section to the one on either side, Yz
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1913
