JDPower stated that in the 2011 Consumer Quality Report, the overall quality of automobiles sold in the United States market reached a new height, setting a record high since the 25-year history of the report. The Consumer Report counts the number of problems per 100 vehicles. The average index for this year's report is 107, which is a drop from last year's 109.
After undergoing the recall crisis, Toyota’s auto brand’s ranking rebounded. The company’s luxury car brand not only ranked first in the rankings, the Toyota brand also returned to the seventh place, the brand last year ranked only in the 21st Bit.
In this year's list, Ford’s rankings have dropped significantly, dropping from fifth place last year to 23rd, the lowest ranking for the brand in ten years. In 2011, the brand ranked 25th.
Ranked Top Ten Brands in the 2011 Consumer Report Brand Rankings 2010 Ranking Problem Index 1. Lexus 4 73
2. Honda 6 86
3. Acura 2 89
4. Mercedes 3 94
5. Mazda 18 100
5. Porsche 1 100
7. Toyota 21 101
8. Infiniti 9 102
9. Cadillac 12 103
10. GMC 25 104
Compared to other rolling-element bearings, Slewing Bearings are thin in section and are often made in diameters of a metre or more; the slewing bearings on the Falkirk Wheel are 4 metres diameter and fit over a 3.5 metre axle. Slewing bearings resemble oversize aircraft control surface bearings.
A slewing bearing or slewing ring is a rotational Rolling-Element Bearing or plain bearing that typically supports a heavy but slow-turning or slow-oscillating load, often a horizontal platform such as a conventional crane, a swing yarder, or the wind-facing platform of a horizontal-axis windmill.
Slewing bearings often use two rows of rolling elements. They often use three race elements, such as an inner ring and two outer ring "halves" that clamp together axially.
Slewing bearings are often made with gear teeth integral with the inner or outer race, used to drive the platform relative to the base.
As for other bearings that reciprocate, rather than rotating continuously, lubrication can be difficult. The oil wedge built up in a continuously rotating bearing is disrupted by the stop start motion of slewing. Instead, a hydrostatic bearing with pumped oil flow may be used.
Slewing Bearings
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