This section is from the "Modern Machine Shop Construction, Equipment, And Management" book, by Oscar E. Perrigo. Also see Amazon: Modern Machine Shop Construction, Equipment, And Management.
The Grinding Department and the Polishing Department are for obvious reasons placed as far from the other work as possible. Much of the cylindrical work is sent to the grinding room to be reduced to perfectly cylindrical form on wet grinders and does not require any polishing finish. For this work three large, two medium, and eight small grinders are provided. One large and two small dry surface grinders are arranged to take such small parts as require this treatment.
The Polishing Department as now known in connection with a machine shop is somewhat new in this class of machine work, but its importance and efficiency is becoming more recognized as its usefulness is being demonstrated. Four disk grinders or polishers are provided for small or medium sized flat surfaces, and work direct from the planers is quickly polished to a fine finish and quite true. Three speed lathes are expected to do all the small cylindrical work that has not been ground.
Work requiring a bright buffed finish is taken to the four buffers, while irregularly shaped parts are polished on the three polishing heads or on the two belt or strapping machines. This room, of course, enclosed as tightly as possible to avoid the difficulty of floating particles, or grinder's dust passing to the other departments. Nearly all of this trouble may be prevented by a small exhaust fan connected with hoods at each of the machines by a suitable main pipe and branches, by which the dust is discharged in the open air, or a proper receptacle. This has the additional advantage of saving the eyes of the workmen from much annoyance and discomfort.
Small parts when completed are taken to the Finished Parts Storeroom, which is located in the front end of the shop and furnished with shelves arranged in alcoves on one side of the room, while the opposite side is reserved for somewhat larger parts, or collections of parts, as may be necessary. This space should be fitted up to suit the particular kind of work, and may be in broad shelves running lengthwise of the room, or in alcoves as on the opposite side.
Between this room and the grinding department is the Small Parts Assembling Department, in which it is intended to assemble groups of small parts, as for instance, the parts comprising the apron of a lathe, or similar work. If the parts are accurately made no machine work will be here needed, although a small engine lathe might be a convenience at times. Bench vises and the usual assembling "jacks" comprise most of the necessary fittings.
In the back end of the opposite gallery is located the Experimental Department, where small and medium sized experimental work is to be done.
It contains, as will be seen in the plans, a variety of machines suitable for experimental work, so as to render it unnecessary to go to any of the other departments for anything except large turning, planing, and gear cutting. Such a department is a necessity to a shop aiming at making progress and keeping up with the times, as work of this character costs too much if done in the regular tool room, and it is not only an awkward but expensive matter to place it in any other department.
Along the front of each gallery is an iron railing 32 inches high, that on the front end gallery having an easily removable section 12 feet in length, for convenience in passing work to and from the gallery by the traveling crane.
The Foremen's Offices, the Tool-Distributing and the Finished Parts Storeroom are sheathed up with ⅞-inch pine to the height of 44 inches, above which it is enclosed with wire netting of 1-inch mesh and 4 feet in width. This form of construction affords an ample enclosure and does not materially impede the light. The doors should be provided with spring locks, and workmen generally not allowed in these enclosures except by permission. This is one of the necessary measures of good discipline, and one that foremen should always insist upon, without favoritism.