On the Arrangement, Care, and Operation of Wood-working Factories and Machinery: Forming a Complete Operator's HandbookE. & F.N. Spon, 1873 - 189 páginas |
Otras ediciones - Ver todas
Términos y frases comunes
accidents amount angle arranged band saws belts bench bevel blades boiler bolts carriage centre chisels circular saw construction cost countershaft cross cutting cutter-heads cutters cylinder danger driving edges engine feed feet a minute files fire floor frame furnace gauge girders grinding hand handle hard wood heat heavy high speed holes inches diameter iron jack plane jig saws joint joist kind labour lathe line shaft loose pulleys lumber machinery machinist makers mandrils matter metal mill mortising nearly needed parallel patent piece planing machines practice principles reciprocating machines repairs requires resawing revolutions a minute ripping saws roller machines rotary machines rule saved screws shavings side spindles square steam steel straight stuff surface tempered tenoning thick thing trucks true try square turning wheels width wood cutting wood machines wood manufacture wood shops wood workmen wood-working establishments Wood-working Machines
Pasajes populares
Página 26 - S in. or more thick, almost any kind of shafting can be hung with safety on wood screws, or lag screws as they are sometimes called, passing through the hanger plate, and screwed directly into the joists. These screws should be of good size, not less than | in. in diameter in any case, and long enough to pass into the joist a distance at least equal to the thickness of the hanger plate.
Página 22 - Pulleys should be turned true and balanced — balanced perfectly, no matter what their speed. The effect of an unbalanced pulley is as its speed, but it is never known where pulleys may have to be used in changing, and the only safe rule is to have every pulley THE OPERATOR'S HANDBOOK.
Página 171 - ... bought for a pittance' but also because in Remingtons, the Illinois gunmakers, there were manufacturers available who could put ideas into practical effect.1 Standardization could be applied not only to final products but to the machines which produced them. 'Wood machines,' wrote an English expert, 'are made in America at this time like boots and shoes, or shovels and hatchets. You do not, as in most other countries, prepare a specification of what you need . . . but must take what is made for...
Página 21 - ... often leads to expense and trouble. The first section of shafting carrying the main driving pulley should have a diameter equal to one-fifth the width of the main driving belt, and...
Página 25 - A ball of strong packing thread, and half-a-dozen or more old screw nuts for the plumb-lines, make the outfit, and the job can be well executed, at but little expense and time, if the hangers are properly made, and erected so as to be adjusted without trouble.
Página 24 - ... hour, if the larger belts are thrown off to relieve it from strain, and the shafting is straight and true. Shafting is not liable to get out of line horizontally, unless from the strain of belts ; it is, however, well to line up as often as twice a year to be sure that all is right. A shaft may be levelled by almost anyone when the hangers are properly made, and can be done at noon, or after stopping in the evening, without interfering with the business at all. To line a shaft horizontally is...
Página 77 - Large belts, unless very long, should never be thrown on while the pulleys are in motion, but drawn together with clamps and joined. If they have to be thrown on, stop the pulleys, lash the belt to the face of the pulley, and turn by hand or slowly with the power until the pulley has made a half turn, and the belt is on, when the lashing can be removed.
Página 146 - ... but a sequence of improvements in wood conversion. Whenever a process is invented by the wood-machine operators, we soon have machines to perform it, and there is no greater mistake than to ascribe the progress of wood manufacture to machine improvement ; it is just the opposite, machine progress comes almost entirely from improvements in shop manipulation, and from the wood workmen themselves.
Página 122 - In selecting saws, a good plan to test the temper, if the saw is not joined, is to roll up the ends, and see if it will spring back straight or remain bent. If it spring back nearly to its first shape, the temper is good. The texture or grain of the steel, which is the only clue to quality, can be determined by breaking a short piece from the end of the blade.