Abstract: A twist-lock assembly for locking and unlocking a feed spout and control cage in their respective operative positions on a centrifugal blasting wheel. The twist-lock assembly includes a stationary control cage adapter and a rotatable clamping plate. The control cage adapter is mounted on a side wall of the centrifugal blasting wheel housing and located at an access opening in the housing. The clamping plate is rotatable with respect to the control cage adapter for locking and unlocking the control cage and the feed spout in their respective operative positions in response to rotation thereof between a clockwise locking position and a counterclockwise unlocking position. The result is an improved assembly for quickly dis-connecting and re-connecting the feed spout and control cage to provide ease of maintenance.

Abstract: An impeller for a centrifugal blasting wheel includes a base plate, a support collar, and a plurality of spaced rotor blades interconnecting the base plate and support collar. A step is formed at the inner end of the collar and the outer ends of the rotor blades which causes blasting shot to be discharged to the throwing blades of the blasting wheel in a relatively more radial direction to reduce wear of the throwing blades. The base plate also has a frustum-shaped central boss formed to minimize wear of the base plate by the blasting shot. The frustum-shaped central boss has a recess formed therein so that the head of the bolt that connects the impeller to the throwing wheel is located entirely within the recess to also reduce wear of the bolt head.