| 摘要 |
A chain saw guide bar having two opposed nose plates at the free end thereof. Each nose plate has an outwardly formed impression which faces the outwardly formed impression in the opposed nose plate, to allow a thicker idler roller assembly to be mounted between the outwardly formed impressions. The idler roller assembly includes an inner bearing journal, roller bearings, and an idler roller with a concave groove around its outer circumference, within which groove the drive links of the saw chain track. Two thin shims are placed on opposite sides of the idler roller assembly between the nose plates. A replacement nose assembly is also disclosed which includes two substantially identical outer plates positioned apart a given distance. An idler roller bearing assembly is positioned between the two outer plates, and includes an inner bearing journal having a thickness the same as the given distance, bearings, and an outer idler roller having a thickness smaller than the given distance and the inner bearing journal.
|
