Dust Generation Properties of Solid Lubricant Film Coated and Perfluoropolyether Lubricated Ball Bearings

Author:

Miyake Shojiro1

Affiliation:

1. Nippon Institute of Technology, 4-1 Gakuendai, Miyashiro-machi, Saitama 345, Japan

Abstract

The purpose of this work is to elucidate the properties of ball bearings used for clean applications. Dust, namely wear debris particle generation behavior of ball bearings lubricated with solid lubricant films and low vapor pressure PFPE (perfluoropolyether) grease was investigated using a laser scattering type dust counter under small-angle oscillatory conditions. In the case of the solid lubricated bearing, dust generation began to increase rapidly at a certain number of oscillatory cycles, as deduced from the bearing surface damage. Bearings lubricated with a MoS2/Ag layer and MoS2 sputtered films showed less dust generation, starting torque and surface damage than ion-plated Ag and Au film lubricated and unlubricated bearings. Dust generation was deduced to be due to the damage formation of oscillatory ball bearings, based on the size of the contact elliptic area. The total number of particles generated from the ball bearing lubricated with PFPE grease is very large, but bearing damage is very small. Degraded PFPE was observed on the side plate seal by FTIR. Therefore, dust generation from a PFPE-lubricated bearing is deduced to be due to PFPE degradation. Particles generated from bearings with dry contact include large particles. In contrast, most of the particles generated from bearings lubricated with PFPE grease are very small. Side plate seals of ball bearings decrease the amount of dust generated from these bearings. [S0742-4787(00)00704-9]

Publisher

ASME International

Subject

Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering,Mechanics of Materials

Reference12 articles.

1. Miyake, S., and Kaneko, R., 1992, “Microtribological Properties and Potential Applications of Hard, Lubricating Coatings,” Thin Solid Films, 212, pp. 256–261.

2. Hardegen, B., and Lane, A. P., 1985, “Testing Particle Generation by a Wafer Handling Robo,” Solid State Technol., 28 pp. 189–195.

3. Nagaraj, H. S., Owens, B. L., and Miller, R. J., 1987, “Particle Generation in Devices Used in Clean Manufacturing,” IBM Research Report, R C 13196 (#59039).

4. Cheng, H. S., Xuan, J. L., and Miller, R. J., 1990, “A Study of Submicrometer Wear Particle Generation for Contamination Control in Clean Manufacturing,” Proceedings of the Japan International Tribology Conference, Nagoya, pp. 1563–1568.

5. Kaneko, R., 1986, “Development of Magnetic and Optical Storage in Japan,” ASLE Special Publication, sp-21, pp. 8–13.

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