Yes, I have those adapters and switch between 1" 8tpi and 1-1/4" 8tpi. A few years ago I got a Metric adapter from Vicmark so I could do use the chucks for a demo on a Oneway lathe (Grizzly did not have that adapter and the Vicmark one fits fine).
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When failure is not an option
Mediocre is assured.
Thanks, Dennis.