An excellent lubricant for lathe centers is made by using 1 part graphite and 4 parts tallow thoroughly mixed.
Rock Falls, Ill. E. C. Noble.
Put small zinc and lead shavings in equal quantities into best olive oil, and place the oil in a cool place until it becomes colorless. This oil is the best obtainable for fine mechanisms. O. G.
In hard gun-metal bushes, bore a good fit to shaft and split, drill four holes per square inch of surface, each ¼ inch diameter by ¼, inch deep. The holes are to be flat at the bottom and to be spaced zigzag, so that one row of holes is between the holes in the opposite side, thus: . •. •.
Fill the holes with a compound prepared as follows: Melt 1 pound solid paraffine and add 2 ounces of litharge, dissolved isinglass and sulphur; add further 2 pounds of fine plumbago and mix thoroughly, Toronto, Can. J. H. Holdsworth.
To prevent heating and sticking of bearings on heavy machine tools due to running continuously at high speeds, fill an oil can with a good spring bottom (the "Gem" oiler preferred) about one-eighth full of Dixon's flake graphite, and the remainder with kerosene oil. As soon as the bearing shows the slightest indication of heating or sticking, this mixture should be forcibly squirted through the oil hole until it flows out between the shaft and bearing, when a small quantity of thin machine oil may be applied. H. J. Bachmann.
An excellent lubricating oil for heavy duty and fast running journals may be made by mixing equal parts of sperm oil, cylinder oil and "black strap" or common machine oil. A. D. Knauel.
Dissolve 2¼ pounds of lead acetate in 14 pounds hot tallow and add 2¼ pounds black antimony. Stir the ingredients constantly until cold. W. R. Bowers.
To prepare oil for micrometers, fine mechanisms, etc., take neatsfoot oil and put into it some lead shavings in order to neutralize the acid contained in the oil; let this stand for a considerable time, the longer the better. Oil thus prepared never corrodes or thickens. Joseph M. Stabel. Rochester, N. Y.
I have tried many different kinds of lubricants for lathe centers and as yet I have found nothing equal to white lead mixed with sperm oil, with enough graphite added to give it a dark lead color. It can be mixed and kept in small tin boxes; add oil when necessary to keep it from getting too thick. S. C. S.
A good grease for gear wheels where iron meshes into iron can be made of 1 part of graphite, and 4 parts of tallow mixed with some oil. For steel gears meshing into wood 1 part of graphite, 2 parts of beeswax and ½ to 1 part of tallow will form a very good and lasting grease for same. Cleveland, O. Max J. Oches.
When very heavy work is to be done on a planer it may happen that the oil or other lubricant used on the ways of the planer does not possess sufficient "body" to resist the pressure, and the wearing surface will be cut or badly "roughed up." The writer had a case wherein the planer table weighed eleven tons and the load to be put upon it thirteen tons, making twenty-four tons in all. The bearing surfaces of the V's appeared very narrow to sucessfully support such a weight. To avoid cutting, the surfaces were lubricated with a mixture of one gallon of "Vacuum" cylinder oil and one pound of Dixon's flake graphite. The planing job was easily and successfully done with no injury to the wearing surfaces. Oscar E. Perrigo.
In order to keep white lead and tallow soft in winter and summer alike, so that it can be applied with a brush to finished parts of machinery before shipping them, and for use in fitting keys, etc.. prepare a mixture composed of five pounds of white lead and fifteen pounds of tallow. Heat this in a suitable receptacle, and stir until the ingredients are thoroughly mixed. Then remove the mixture to a cool place, and add two quarts of linseed oil, continuing to stir the composition until it becomes cold, as otherwise the white lead will settle at the bottom. This mixture will always remain of the same consistency at all temperatures. R. S. F.