JP2004019803A - Application method of rust proof agent to bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the rust proof treatment cost of a bearing, by applying an inexpensive rust proof agent prepared from petroleum to a fluorocarbon grease sealed-in bearing so as not to cause lubrication failure. <P>SOLUTION: According to this application method for applying the rust proof agent prepared from petroleum to the fluorocarbon grease sealed-in bearing, the rust proof agent prepared from petroleum is applied to an inner ring inside diameter surface and an outer ring outside diameter surface only, and not applied to the other regions. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for applying a mineral oil-based rust inhibitor to a bearing formed by sealing a fluorine-based grease.
[0002]
[Prior art]
FIG. 1 is a cross-sectional view showing an example of a rolling bearing. In general, a rolling bearing is provided inside the bearing, specifically, an inner peripheral surface 1a of an inner ring 1 for the purpose of preventing rust during processing. A rust preventive is applied to the inner peripheral surface 2a of the outer ring 2 and the inner surface 3a of the shield plate 3. For the purpose of preventing rust from occurring until use, the outer surface of the bearing, specifically, the inner surface 1b of the inner ring 1, the side surface 1c of the inner ring 1, the outer surface 2b of the outer ring 2, and the side surface of the outer ring 2 are provided. A similar rust preventive is applied to the outer surface 3b of the shield plate 3 and 2c. In addition, the code | symbol 4 in a figure is a rolling element, and the code | symbol 5 is a cage.
[0003]
[Problems to be solved by the invention]
Conventionally, rust preventives are inexpensive, so mineral oil or mineral oil-based rust preventives, in which organic sulfonic acid salts, fatty acids, phosphate esters, nitrites, etc. are blended with mineral oil, have become common. ing. However, in a rolling bearing in which a fluorine-based grease is sealed, the affinity between the mineral oil and the fluorine-based grease is low, so that the fluorine-based grease is applied to the inner ring inner circumferential surface 1a and the outer ring inner circumferential surface 2a coated with the mineral oil-based rust preventive. As a result, the inner ring raceway surface and the outer ring raceway surface and the rolling element 4 come into metallic contact due to poor lubrication, causing early seizure, peeling, abnormal noise, etc., and impairing the function of the bearing. Become.
[0004]
As a countermeasure, it is conceivable to apply a rust preventive having a high affinity to the fluorine-based grease to the bearing in which the fluorine-based grease is sealed. However, these rust preventives for fluorine-based grease are considerably more expensive than mineral oil-based rust preventives, and increase the production cost of bearings.
[0005]
The present invention has been made in view of such a situation, and uses a low-priced mineral oil-based rust inhibitor to coat a fluorine-based grease sealed bearing so as not to cause poor lubrication, thereby preventing the bearing from being damaged. The purpose is to reduce rust treatment costs.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a method for applying a mineral oil-based rust preventive to a bearing formed by sealing a fluorine-based grease, wherein the mineral oil-based rust preventive is applied to an inner ring inner surface and an outer ring outer surface. A method for applying a rust preventive agent to a bearing, characterized in that the method is applied only to a radial surface and is not applied to other parts.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail.
[0008]
Referring again to FIG. 1, in the present invention, a mineral oil-based rust preventive is applied only to the inner ring inner diameter surface 1b and the outer ring outer diameter surface 2b. The inside of the bearing is completely degreased and dried, and no external rust preventive oil is applied after grease is filled. Therefore, since the mineral oil-based rust preventive does not exist inside the bearing and does not flow into the inside from the gap between the shield plate 3 and the inner ring 1, even if the fluorine-based grease is sealed, Does not come into contact with the mineral oil-based rust inhibitor.
[0009]
Therefore, the fluorine-based grease can easily flow between the inner ring raceway surface and the outer ring raceway surface and the rolling elements 4, and does not cause poor lubrication.
[0010]
In the present invention, the method of applying the mineral oil-based rust inhibitor is not limited, and brush coating, spray coating, or the like can be employed. Also, there is no limitation on the amount (film thickness) of the mineral oil-based rust preventive applied. Further, the types of the mineral oil-based rust preventive and the fluorine-based grease are not limited, and a mineral oil-based rust preventive and a fluorine-based grease conventionally used for bearings can be used.
[0011]
【The invention's effect】
As described above, according to the present invention, the mineral oil-based rust preventive is applied only to the inner ring inner surface and the outer ring outer surface that do not come into contact with the fluorine-based grease. Rust prevention treatment can be performed at low cost without causing poor lubrication.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an example of a rolling bearing.
[Explanation of symbols]
Reference Signs List 1 inner ring 1a inner ring inner peripheral surface 1b inner ring inner diameter surface 1c inner ring side surface 2 outer ring 2a outer ring inner peripheral surface 2b outer ring outer diameter surface 2c outer ring side surface 3 shield plate 3a shield plate inner surface 3b shield plate outer surface 4 rolling element 5 cage

Claims (1)

A method for applying a mineral oil-based rust inhibitor to a bearing formed by sealing a fluorine-based grease, wherein the mineral oil-based rust inhibitor is applied only to the inner ring inner diameter surface and the outer ring outer diameter surface, and is applied to other portions. A method of applying a rust preventive agent to a bearing, characterized in that it is not performed.

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