| 摘要 |
A centrifugal blasting apparatus (11) is operable by a motor driven shaft (21) providing an annular ridge (33) to provide a fixed reference. An annular sleeve (34) is journalled upon the shaft (21) and sandwiched between the annular ridge (33) and a hub (40) which, in turn, is connected to and supports the particulate throwing wheel (50, 70) in precise axially spaced alignment. An axial thrust is applied against the hub (40) through an impeller (115) and centering plate (112) by a threaded bolt (117) secured to the shaft (21).
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