Tschuldigung aber jedes Schwert mit kugelgelagerten Umlenkstern vorne ist ein "roller nose bar".
Denke damit ist alles gesagt und verständlich warum die sich nicht im Alltag wiederfinden.
Quelle: http://www.cannonbar.com/bar-tips-accessories/
The roller nose is a re-creation of the original roller noses that were popular in the 1950’s. We redesigned them for competition bars with the feature that the can be operated at up 25,000 RPM! Speed is the name of the game when you are chainsaw racing.
It should be kept in mind that they are not designed for bore cutting or typical chainsaw cutting; they are sort of like a very high end race car which you would not refer to as “Street Legal”.
g,
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