Oils For Highspeed Bearings

To prevent heating and sticking of bearings on heavy machine tools due to running continuously at high speeds, take about 1/8 of flake graphite, and the remainder 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.

Oils For Heavy Bearings

An excellent lubricant for heavy bearings can be made from either of the following recipes:

I

Paraffine........... 6 pounds

Palm oil............ 12 pounds

Oleonaphtha........ 8 pounds

II

Paraffine........... 8 pounds

Palm oil.. . ......... 20 pounds

Oleonaphtha........ 12 pounds

The oleonaphtha should have a density of 0.9. First dissolve the paraffine in the oleonaphtha at a temperature of about 158° F. Then gradually stir in the palm oil a little at a time. The proportions will show that No. II gives a less liquid product than No. I. Quicklime may be added if desired.

Oils For Lathe Centers

An excellent lubricant for lathe centers is made by using 1 part graphite and 4 parts tallow thoroughly mixed.

Sewing Machine Oil

I

Petroleum oils are better adapted for the lubrication of sewing machines than any of the animal oils. Sperm oil has for a long time been considered the standard oil for this purpose, but it is really not well adapted to the conditions to which a sewing machine is subjected. If the machine were operated constantly or regularly every day, probably sperm oil could not be improved on. The difficulty is, however, that a family sewing machine will frequently be allowed to stand untouched for weeks at a time and will then be expected to run as smoothly as though just oiled. Under this kind of treatment almost any oil other than petroleum oil will become gummy. What is known in the trade as a "neutral" oil, of high viscosity, would probably answer better for this purpose than anything else. A mixture of 1 part of petrolatum and 7 parts of paraffine oil has also been recommended.

II

Pale oil of almonds.   9 ounces Rectified benzoline..   3 ounces Foreign oil of lavender.............   1 ounce

Petroleum Jellies And Solidified Lubricants

Petroleum jelly, vaseline, and petrolatum are different names for the same thing.

The pure qualities are made from American stock thickened with hot air until the desired melting point is attained. Three colors are made: white, yellow, and black of various qualities. Cheaper qualities are made by using ceresine wax in conjunction with the genuine article and pale mineral oil. This is the German method and is approved of by their pharmacopoeia. Machinery qualities are made with cylinder oils, pale mineral oils, and ceresine wax.

I

Yellow ceresine wax 11 parts White ceresine wax. 6 parts American mineral oil, 903/907.......... 151 parts

Melt the waxes and stir in the oil. To make white, use all white ceresine wax. To color, use aniline dyes soluble in oil, to any shade required.

II

Ceresine wax....... 1 pound

Bloomless mineral oil, Sq. 910....... 1 gallon

Melt the wax and add the oil, varying according to the consistency required. To color black, add 28 pounds lampblack to 20 gallons oil. Any wax will do, according to quality of product desired.

White Petroleum Jelly

White tasteless oil.. 4 parts White ceresine wax. 1 part

Solidified Lubricants

I

Refined cotton oil. . . 2 parts

American mineral oil, 903/907.......... 2 parts

Oleate of alumina . . 1 part

Gently heat together.

II

Petroleum jelly. .. . 120 parts

Ceresine wax. ..... . 5 parts

Slaked lime.......         0.5 part

Water............ 4.5 parts

Heat the wax and the petroleum jelly gently until liquid; then mix together the water and lime. Decant the former into packing receptacles, and add lime and water, stirring until it sets. For cheaper qualities use cream cylinder oil instead of petroleum jelly.