(3) Styles and Attachments required: Countershaft and wrenches are regularly supplied. Other fittings: Slotting attachment, boring bar, side grooving head, threading attachment, face-plate jaws. Power Hack Saws These are designated by the different makers as No. 1, No. 2, etc. In ordering it is best to specify the capacity, i.e., the size of the largest bar to be cut. The usual capacities are as follows: No. 1, 4 in. X 4 in.; No. 2, 5 in. x 5 in.; No. 3, 5 in. X 6 in.; No. 4, 7 in. x 8 in. The machines are driven from the line-shaft direct without an intermediate countershaft, the motion being stopped and started by means of a clutch and lever on the machine. The larger machines can be obtained with swivel vises, so that cuts can be made at any angle. Pipe Machines These machines, used for threading and cutting pipe, usually bear arbitrary maker's numbers. When ordering, it is best to give the capacity. These run about as follows: 1/4 to 2 in.; 1/4 to 3 in.; 1 to 4 in., 1 1/2 to 6 in., 2 1/2 to 8 in., 2 1/2 to 10 in., 2 1/2 to 12 in., 7 to 16 in., the size in each case being the limiting sizes of pipe which can be cut or threaded. When obtaining quotations give: (1) Capacity as described above. (2) Power, belt, direct-connected steam engine, direct-connected electric motor, combined hand and power (for either of above). (3) Style and Attachments required: One set of (right-hand) dies for American Standard “V” thread is regularly supplied; if dies for Whitworth Standard or other threads are required they should be specially ordered. A countershaft, a cutting-off device and all wrenches are also regularly supplied. Other fittings are rear pipe rest, oil pump, nipple holder, attachments for threading bolts and tapping nuts, and wheels for rendering machine portable. Bolt Cutting Machines uses. The nominal size gives the size of the largest bolt that can be handled. They can be obtained in a wide variety of sizes and designs for special Usual capacities are as follows: From 1/4 in. to 1/2 in., 3/4 in., 1 in. and 1 1/4 in.; from 1/2 in. to 1 1/2 in., 2 in., 2 1/4 in., 2 1/2 in. and 3 in.; from 3/4 in. to 2 1/4 in., 2 1/2 in., 3 in., and 3 1/2 in.; from 1 in. to 3 1/2 in., 4 in., 5 in., and 6 in. Hand-driven machines may be obtained up to 1 1/2 in. When obtaining quotations give: (1) Capacity as described above. (2) Power; belt, motor drive, combined hand and power (for either of above). (3) Style and Attachments required: The following attachments are regularly supplied; countershaft, wrenches, set of dies, set of taps, die head, tap chuck and chip and oil pans. Other attachments are pipe dies, power feed and lead screw, and oil pump. Punches and Shears Single ended machines can be used for either punching or shearing by simply changing the dies. Double ended or "combined" machines can also be changed for either operation. The only reason that "combined" machines are built is because the design of these tools renders them well adapted to a cheap and compact combination; in other words, a machine of twice the capacity (output) can thus be obtained at somewhat less than twice the cost and floor space. A great number of variations in capacity and scope of operations can be obtained, so that in calling for prices the work that the machine is to perform should be described quite fully. The following table, giving the relative capacities of punches and shears as usually built, will serve as a guide in outlining capacities to the bidder. Table III.—Capacities of Standard Vertical Punches and Shears, Applying to Either Single or Double Machines. All Dimensions in Inches 25, 20 36, 30, 25, 20, 12 72, 60, 54, 48, 42, 26, 25, 20, 15 36, 18 The punching capacities in the above table may be used as a basis for determining the rating of the machines on holes of different diameters and through different thicknesses. When obtaining quotations give: (1) Capacity and depth of throat of machine as indicated above. (2) Power; belt, steam-engine or motor drive. (3) Style and Attachments required: Single or double ended? The following equipment is regularly supplied; one pair of shears, one punch and die with the necessary connections and the usual gauges, stripper and wrenches. Other attachments are special shears, dies, gauge dies, blades for rounds, angle shears, architectural jaw, automatic stop, radial crane (for attachment on top of machine), etc. Steam Hammers There are two general styles of hammers, single frame and double frame. The smaller sizes are usually of the former type, and, having only one pedestal and being approachable from all other sides, they are well adapted to general blacksmith-shop work. The double frame type, having two pedestals, can be designed for the largest sizes, and is better adapted to heavy, special work. The various sizes are designated by the actual weight of the ram with its die and rod and piston; the added force of the blow from the steam or air pressure on top of the piston is not taken into consideration. The following sizes are typical for single frame hammers: The following table will be found convenient for reference when determining the proper size of hammer to be used on the different classes of general blacksmith work. The smaller hammer will be large enough in case the size of stock is only worked occasionally, while the larger hammer should be selected if the general run of work is of the size given. (1) Nominal size as described above and character of work to be performed. (2) Style required: Single or Double Frame? Cast iron or cast steel frame? Whether for locomotive frame work (hammer of extra long stroke and clearance)? HOISTING ENGINE AND BOILER FOR GENERAL HOISTING WORK Note. For outline of ordering-requirements for haulage-engines for inclines, etc., see p. 170. (1) Service. State whether for quarry, pile-driving, general building, bridgebuilding, logging, or other use. (2) Capacity.—Give either (1), the size of cylinders desired, or (2) state the average and maximum loads to be handled and the speed for same. (3) Style.-State whether single or double cylinder; reversing or non-reversing; one, two, three or four drums; with or without slewing drums; whether belt pulley is required; whether to be mounted on dock wheels. Also state any special requirements. (4) Number of Units Required? (5) Fittings. Enumerate such of the following fittings as are to be supplied, and also state which are not to be supplied. Oil cups, wrenches, sight-feed lubricator, drain-cocks, throttle valve, boiler fixtures ready for steam, anchor-bolts. (6) Spares.-State whether any spare parts are to be supplied; (enumerate, or call for recommended list). (7) Shipping.—State whether there are any limitations on weights of pieces as affected by shipping facilities. ROCK CRUSHER, ETC. Rock crushers are of two general types, "jaw" and "rotary." The former are usually preferred when the crushing plant is to be portable, while the latter are better adapted to large, stationary installations. (1) State style of crusher preferred, and purpose of plant. (2) Kind of rock to be reduced? Whether wet or dry? (3) To what fineness is it to be crushed? (4) State capacity in tons per hour. (5) Is machine to be stationary, portable or semi-portable. (6) State any experience with previous machines, or any preferences you may have, that will influence your choice of this outfit. (7) State whether any of the following complementary equipment is to be furnished. Steam engine and boiler, gasoline engine or motor to drive (if the latter, state the kind of current to be used and its voltage, and if alternating, state also its phase and frequency). Driving belt. Stone elevator; state height. Revolving Screen. Storage Bin (portable). Bin Gates. Spare Parts. SEC. II. MACHINE AND PLANT DETAILS METALLIC PISTON OR VALVE ROD PACKINGS The following information schedule is taken from that issued by the U. S. Metallic Packing Co. (1) Number of Packings Wanted: For Valve Rods; For Piston Rod? (Write a separate specification for each.) (2) Diameter of Rod? (3) Diameter of Face of Stuffing Box? (4) Diameter of Stuffing Box, inside? (5) Diameter of Opening into Cylinder or Chest? (6) Depth of Stuffing Box? (7) Number of Stud Bolts? (8) Distance between Centres of Stud Bolts? (Send sketch.) (11) Diameter of Stud Bolts? (12) Travel of Valve Stem, Cut-off, or other rod of varying stroke? (13) Distance between Cross-head and Stuffing Box? (Send sketch.) (14) Position of Guides? (15) Is engine vertical or horizontal? (16) If Vertical, is rod out of Top or Bottom of Cylinder? (17) Is Engine High or Low Pressure? (18) Give Maximum Steam Pressure. (19) If for Steamer, Ferry or Tug, give name. (20) Is Superheated Steam used? (3) Kind of liquid to be used, water, oil, glycerine, chemicals, etc.? INJECTORS (1) State for what Service injector is to be used, stationary, portable or traction engine, locomotive, or marine. (2) State Number and Kind of Boilers to be fed; and give Horse-power, or, if this is not known, give the following particulars: For Flue Boilers.-Diameter and length of shell; and number, diameter and length of flues. For Multitubular Boilers.-Diameter and length of shell; and number, diameter and length of tubes. For Vertical Boilers.-Number, diameter and length of tubes; diameter and height of fire-box; and size of fire-door opening. For Loco. Type Boilers.-Number, diameter and length of tubes; width, length and height of fire-box; and size of fire-door opening. For Marine (Scotch) Type Boilers give data asked for under Flue and Multitubular boilers above. (3) State Steam Pressure-highest, lowest and average. (4) Is the injector to be of the "Lifting" type (raising its suction water), or of the "Non-Lifting" type (working under a head of water)? In the former case give the vertical suction lift; in the latter the water pressure. |