21-02-2019, 03:40 AM
Hopefully the clearances acheived are at least in the Normal range. My father reckoned he could detect the difference in new bearings between one, two, three spot ratings.
Much is made of end loading of rollers but in normal use do the roller ends or track edges spall?
Seems relatively simple to sleeve the shaft and turn the housing for a metric bearing. However dificult to find a truly circular housing or to hold it so it stays that way. I can see no probems but will discover.....
The Chinese situation is curious. They produce millions of cars each year and presumably most give service comparable to excellent rivals available in the east. But they seem unable to control poor products. Here imported trailers suffer immediate and dangerous bearing failures. There is so much ultra high precision work in a bearing getting the metallurgy and heat treatment correct would seem a minor effort.
Same applies to many Indian products. A car club imported water pump seals but fail prematurely
Much is made of end loading of rollers but in normal use do the roller ends or track edges spall?
Seems relatively simple to sleeve the shaft and turn the housing for a metric bearing. However dificult to find a truly circular housing or to hold it so it stays that way. I can see no probems but will discover.....
The Chinese situation is curious. They produce millions of cars each year and presumably most give service comparable to excellent rivals available in the east. But they seem unable to control poor products. Here imported trailers suffer immediate and dangerous bearing failures. There is so much ultra high precision work in a bearing getting the metallurgy and heat treatment correct would seem a minor effort.
Same applies to many Indian products. A car club imported water pump seals but fail prematurely