| 摘要 |
PROBLEM TO BE SOLVED: To improve a mounting accuracy of a blanket cylinder of a printer and to improve a printing accuracy of the printer. SOLUTION: A plural-row tapered hole bearing 4 for the printer comprises an inner race 5 and an inner race 6 having two tapered inner diameters engaged with outer peripheries of tapered shafts 2 and 2' of the blanket cylinder 1 of the printer, a pair of outer races 8, and two rows of conical rolls 9 as essential constituents. In this bearing 4, a maximum inner diameterϕa of the race 5 disposed at the small diameter side of the shaft 2 and a minimum inner diameterϕb of the race 6 disposed at a large diameter side of the shaft 2 satisfy a relation ofϕb<=ϕa. Thus, an optimum operating gap can be assured. It is desired to setϕb<=ϕa<=ϕb+0.015 mm from a viewpoint of assuring the optimum operating gap and stabilizing a fixed state after clamping.
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