Hybrid ceramic bearings

Static Load Rating of Hybrid Ceramic Bearing... 

Thus, the static load rating of hybrid ceramic bearings is limited by the deformation of steel races. Therefore, the static load rating of hybrid ceramic bearings is 0.85 times the static load rating of steel bearings. 

Hybrid ceramic bearing balls Permanent 0.83 times that of... 

Silicon nitride bearings include all-ceramic bearings, which use silicon nitride for inner and outer rings and balls, and hybrid ceramic bearings, in which inner and outer rings are made of bearing steel and balls are made of silicon nitride. 

In this section, the life test results for ceramic bearings will be presented. Specifically, life test results for three types of bearings will be discussed all-ceramic bearings, hybrid ceramic bearings, and steel bearings. 

All ceramic bearing NC6206 Hybrid ceramic bearing 3NC6206 Steel bearing M50 6206... 

Using the above results, in terms of the life of all-ceramic bearings and hybrid ceramic bearings, the dynamic load rating is the same value as that of steel bearings, and therefore life prediction can be conducted using the life calculation formula for steel bearings [7j. 

Takebayashi, H.,Tanimoto,K., and Hattori, T. (1998). Performance of hybrid ceramic bearing at high speed condition (Part 1). J Gas Turbine Soc. Jpn. 26 55. 

Russell, R. A. (1997). Determination of metallo-organic and particulate wear metals in lubricating oils associated with hybrid ceramic bearings by inductively coupled plasma mass spectrometry. Unpublished Ph.D.Thesis, University of Florida,Talahassee. 

Fast growing market for hybrid and ceramic bearings 10 times increase in hybrid bearings between 1995-1999. Increasing numbers of balls reduces the price. Development of other rolling bodies is in the beginning [583], [637], [640], [641]... 

The excellent wear properties of silicon nitride materials are the basis for many applications of these materials, such as ceramic or hybrid rolling bearings, cutting tools, wear parts in automotive engines (valves, cam rollers, valve plates for eommon rail systems), and parts for metal shaping. 

Remarks There are two types of ceramic bearings, all ceramic type and hybrid ceramic type. All ceramic type all outer rings, inner rings, and rolling elements are made of ceramics. Hybrid ceramic type Only the rolling elements, or both rolling elements and inner rings are made of ceramics. 

Tanimoto, K., Kajihara, K., and Yanai, K. (2000). Hybrid ceramic ball bearings for turbochargers, SAE Technical Paper 2000-01-1339. 

Shoda, Y., Ijuin, S., Aramaki, H., The performance of a hybrid ceramic ball bearing under high speed conditions with the under-race lubrication method. Tribology Transactions, 40(4) (1997), 676-684... 

Hybrid bearings using Si3N4 ceramic balls with M-50 or other tool steel rings enable operation up to 300°C while avoiding the difficult manufacturing problems with ceramic rings (45). 

The high reliability of Si3N4 ceramics is demonstrated by hybrid bearings in the main engine pump of the space shuttle [644] and different components in the aircraft s auxiliary power units [650, 651],... 

M. Popp, R. Sternagel and G.Wotting, Hybride- and Ceramic Rolling Bearings with modified Surface and low Friction Rolling Contact , Euromat 1999, 1999. 

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