Radial Ball Bearings with Angular Contact in Machine Tools

The Performance of Ball Bearings With Silicon Nitride Ceramic Balls in High Speed Spindles for Machine Tools

Journal of Tribology ◽

10.1115/1.3261715 ◽

1988 ◽

Vol 110 (4) ◽

pp. 693-698 ◽

Cited By ~ 70

Author(s):

Hirotoshi Aramaki ◽

Yoshio Shoda ◽

Yuka Morishita ◽

Takeshi Sawamoto

Keyword(s):

Silicon Nitride ◽

Temperature Rise ◽

Machine Tools ◽

High Speed ◽

Low Cost ◽

Steel Ball ◽

Ball Bearings ◽

Grease Lubrication ◽

Frictional Loss ◽

High Speeds

Two types of angular contact ball bearings for machine tools having steel rings and silicon nitride balls were tested and the temperature rise was compared with that of conventional steel ball bearings with grease lubrication and oil-air lubrication as well. Experimental results indicated that the temperature rise of silicon nitride ball bearings was much lower than that of steel ball bearings at high speeds. Calculations made using a computer demonstrated that the reduction of gyroscopic moments and centrifugal forces acting on balls because of the low density of silicon nitride resulted in about 30 to 50 percent less frictional loss at high speeds even with low-cost lubrication such as grease or oil-air.

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Limiting speeds and operating temperatures of fixed preload large bore angular contact ball bearings for machine tools

Proceedings of the Institution of Mechanical Engineers Part J Journal of Engineering Tribology ◽

10.1243/1350650991542857 ◽

1999 ◽

Vol 213 (2) ◽

pp. 85-94 ◽

Cited By ~ 4

Author(s):

S. J. Lacey ◽

A Kemble

Keyword(s):

Machine Tools ◽

Ball Bearings ◽

Operating Temperatures

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The Chatterbox: A Device for Hearing Chatter as Sections are Cut

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100072241 ◽

1973 ◽

Vol 31 ◽

pp. 360-361

Author(s):

C. W. McCutchen ◽

Lois W. Tice

Keyword(s):

Machine Tools ◽

Cutting Tool ◽

Guerilla Warfare ◽

History Of ◽

Chatter Marks

Ultramicrotomists live in a state of guerilla warfare with chatter. This situation is likely to be permanent. We can infer this from the history of machine tools. If set the wrong way for the particular combination of cutting tool and material, most if not all machine tools will chatter.In more than 100 years since machine tools became common, no one has evolved a practical recipe that guarantees avoiding chatter. Rather than follow some single very conservative rule to avoid chatter in all cases, machinists detect it when it happens, and change conditions until it stops. This is possible because they have no trouble telling when their cutting tool is chattering. They can see chatter marks, and they can also hear a sometimes deafening noise.

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