No answers yet? It's called a Vari-Grip closer. In a thread on this forum, Larry has a suggestion to release the collet on one of these. I haven't seen one but the "collet tension adjustment" he mentions is probably the ring at the back with the two holes in it. Here'a the thread: https://www.practicalmachinist.com/...t-closer-hardinge-180882/?highlight=vari-grip
No answers yet? It's called a Vari-Grip closer. In a thread on this forum, Larry has a suggestion to release the collet on one of these. I haven't seen one but the "collet tension adjustment" he mentions is probably the ring at the back with the two holes in it. Here'a the thread: https://www.practicalmachinist.com/...t-closer-hardinge-180882/?highlight=vari-grip
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