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 tool check board shown in Fig. 196 may be located at A. At B is an opening above a broad shelf, where dulled tools, drills, etc., may be passed through to the tool grinders in the tool making room, and returned by the same way when ground, more conveniently than to carry them around by the door. Long arbors may be placed on end at the back ends of the passages, proper racks being provided for them.
Files should be kept in a case of pigeon holes of suitable dimensions, the smaller ones at the top, the coarser cuts at the left, and similar shapes of the different sizes under each other. A good arrangement is this; (reading from left to right): First shelf, flat bastard, flat second cut, flat smooth, fine mill, hand smooth, square bastard, square second cut, square smooth; for the next shelf, half round bastard, half round second cut, half round smooth, coarse mill, taper (triangular), round bastard, round second cut, round smooth. Thus two horizontal rows of eight pigeon holes each are required for each size from six-inch up. With the exception of special shapes, one row of eight pigeon holes will be sufficient for each of the three, four, and five inch sizes.
By the above arrangement the tool keeper will soon memorize the positions of each size and shape so as to handle them rapidly. There should be large spaces at the bottom for surplus stock, this space being more difficult to reach in the ordinary issue of files and quite as good for keeping surplus stock. The location of this case is at C, so as to be in convenient reach of the tool keeper.
Fig. 196. The Tool Check Board.
There seems to be a great diversity of opinion as to the best system for issuing and receiving the ordinary tools kept in the tool storeroom, such as drills, taps, tap wrenches, reamers, etc. If we study the conditions of the case a little we will, no doubt, arrive at several conclusions that will help to solve the problem.
Some of these conclusions may be briefly stated as follows: The tools wanted should be delivered with the least possible delay. Therefore they should be so arranged that no time is lost in looking for them. Their location in the shop should be known whenever they are not in the tool room. Every man having tools from the tool room should be held responsible, not only for the safe return, but for the condition of the tools while in his hands. Therefore the tools, as they are brought in, or as soon thereafter as possible, should be examined as to their condition, before the transaction is completed by the replacing of the tool check on the board. The time of the workman is too valuable to be spent in going after tools and returning them, or in grinding them. Therefore they should be delivered and returned by errand boys. These conclusions having been arrived at we may arrange a system in accordance with them.
The plan of using brass checks in issuing tools for indicating their location is most simple, and by the use of duplicate checks it can be made most efficient, giving at any time the location of any particular tool and also the number of tools in the possession of each and every man. For this purpose a board containing a list of names of all the men to whom tools are to be issued is provided, a small section of which is shown in Fig. 196. Beneath each name, which is printed or written on slips of cardboard, and tacked to the board with small brass pins, are two pins or hooks capable of holding a dozen brass checks. Two forms of checks are used. Circular ones about ⅞-inch diameter with the individual number of the man stamped with ¬-inch figures. Another set of checks are « × 1¬ inch, also with the man's number stamped upon them. The same numbers will also be stamped under the check pins on the board.
Twelve of these circular checks are given to each man and twelve of the rectangular checks are hung on the left-hand check pin beneath his name. When he sends for a tool he sends one of his circular checks. This is hung on the right-hand pin under his name and one of the rectangular checks is put in place of the tool in the tool rack or on the shelf. If he sends for another tool the circular check which he sends is added to the first one. Therefore the location of the tool is shown by the presence of the rectangular check in the tool rack, while the number of circular checks under his name shows how many tools he has out.
At the end of the week all tools are called in and the workmen's checks returned for the next week's routine. This is done so that if any mistakes have been made during the week they may be rectified. By this method we have only to glance at the board to see how many tools each and every man has in his possession, and if any particular tool is absent, the check in its place shows at once who has it.
By this system there are no cards to change, no books to keep, or written entries of any kind to make in the process of issuing and receiving tools, and as the work forms a considerable majority of the tool keeper's work, the saving of time over any system requiring written entries is about one half. Besides this, the soiled fingers of the tool keeper soon deface cards and books and should be avoided when possible.