Automatic Ring Holder for Grinder Ring Holder for Grinder machine are used for conveyance and storage of small/mid sized rings,so they can be attached with duplex grinder or center-less grinder etc. Center Less Grinder Machine have strong capability of loading performance and with self-protection function if overloaded. Ring Holder Machine silo type feeding device is a semi-automatic feeding device, which requires workers to arrange and place a batch of work pieces into the silo regularly, and then the feeder will automatically send the work piece to the fixture of the machine tool. This kind of loading device is simple in structure and reliable in operation. It is suitable for large batches of work pieces which are difficult to be automatically oriented due to special weight, size and geometric shape, etc., or to the occasions where the single processing process takes a long time, and a batch of work pieces can be processed by machine tools for a long time. Mai…