Guide roller assembly

In a textile bobbin winding machine of the type having a reciprocating yarn guide rod for crosswinding yarn bobbins, a guide roller assembly for supporting said yarn guide rod, said guide roller assembly comprising:

• an outer shell having an annular rim portion configured for rotational supporting engagement with said yarn guide rod, a central shaft portion, and a continuous wall portion extending between said rim and shaft portions;
• a fixed carrier member;
• and
• a lubricated ball bearing assembly interposed between said carrier member and said outer shell for rotatably supporting said outer shell;
• at least one of said outer shell and said carrier member having a plurality of annular projecting portions defining a plurality of relatively narrow annular spacings between said outer shell and said carrier member and further defining a plurality of annular air chambers in series between said projecting portions in communication with one another through said spacings, a radially inwardmost one of said air chambers being located in the vicinity of said central shaft portion of said outer shell and a radially outwardmost one of said air chambers being located in the vicinity of said rim portion of said outer shell.