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| Did You Know... |
During the Christmas buying season, Visa cards alone are used an average of 5,340 times every minute in the United States.
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RBI Monthly Prize Package Giveaway! |
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NOVEMBER 2007 WINNER
Gary Sparks
AGESIS
Wichita Falls TX |
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A monthly look at recent events in China
Click the title to read the story
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Tony Longo - Roselle |
1 Year |
Birthday |
Strawberry Liang - Beijing |
December 3 |
Ernesto Batista - Roselle |
December 28 |
What are some general guidelines regarding bearing fitting practice ?
by Mike Mortensen - Director of Engineering RBI-USA
One thing that is just as important as choosing a good quality bearing, is deciding how to mount the bearing to the desired assembly. Although every application is unique, there are some general guidelines to use when deciding how to mount bearings.
The press fit should be applied to the ring that is rotating. For example, if the application requires the outer ring to rotate and the inner ring to remain stationary, then the press fit should be applied between the housing and outer ring.
Applications where heavy or shock loading exist typically require tighter press fits.
Tighter press fits result in an increase in rigidity, which is desirable for some applications
If the press fit is too tight, then clearance may be completely removed. This may result in deformed rolling elements/raceways, excessive heat generation, cracked rings, and reduced bearing life.
If the press fit is too loose, then the bearing ring may creep and damage either the shaft or housing bore.
Heat generation causes materials to expand. Different materials have different heat expansion coefficients which cause them to expand at different rates. This difference in heat expansion between the shaft, housing, and bearing materials will affect the shaft and housing fits.
Have a question or topic you would like to see covered? Click here to let Mike know!
Christmas in China
Christians in China celebrate by lighting their houses with beautiful paper lanterns and decorating their Christmas trees, which they call "Trees of Light," with paper chains, paper flowers, and paper lanterns.
Chinese Children hang muslin stockings and await a visit from Santa Claus, whom they call Dun Che Lao Ren (dwyn-chuh-lau-oh-run) which means "Christmas Old Man."
Since the vast majority of the Chinese people are not Christian, the main winter festival in China is the Chinese New Year, which takes place toward the end of January. Now officially called the "Spring Festival," it is a time when children receive new clothing, eat luxurious meals, receive new toys, and enjoy firecracker displays.
An important aspect of the New Year celebration is the worship of ancestors. Portraits and paintings of ancestors are brought out and hung in the main room of the home.
RBI Bearing, Inc. |
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