| 摘要 |
A split block drum (1), wherein the outer diameter dimensions of a base part (41) and a shaft end part (42) are machined smaller by the amount of thickness of a thermally sprayed layer (60), molybdenum steel (JIS: YGTM) is thermally sprayed on the outer peripheral surfaces of these base metals to form thermally sprayed layers (60) and sliding surfaces are formed on these thermally sprayed layers (60), whereby the split block drum capable of smoothly moving a cylindrical part in axial and circumferential directions even if the shaft part is closely fitted to the cylindrical part to assure a more excellent printing quality.
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