I can't recall seeing them in catalogs, but that doesn't mean they don't
exist smewhere.
Like Harold suggested, nearly any adapter can be made or modified to fit,
when a lathe is accessible.
The 3/8"-24 arbors are available with various shank tapers. One with a Morse
2 taper could be turned down to 1/2" straight (and then shortened) if the
taper isn't fully hardened.

WB
.............

"Terry" wrote in message
ups.com...
Does anyone know where I can find this arbor. I have looked at
Mcmaster, Enco, MSC and can't find anything. I have a 3/8" and 1/2"
threaded back drill chuck I would like to mount into my 1/2" collet.

Not sure if it even exists.

Thanks.





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