Louis Ohland wrote:
I've got a suspicion that the Grizzly G9972Z spindle thread may not be
1.75x8

I bought a Kalamazoo Chuck Micro Set chuck and a 1.75x8 mounting
plate. The plate screws on about 4 threads, then stops. It does this
from either direction. My suspicions are that I'm dealing with a metric
thread.

Anyone have a seller of M45x3 nuts so I can check the spindle nose?
There are NO points for Grainger or McMaster.

If you have a tap and die set, they have a thread gauge, which should
maybe have an 8 TPI leaf on it. If not, use the 16 TPI leaf, and see if
the thread is 8 TPI (perfectly exact fit in the gauge) or 3 mm which
won't fit the gauge well.

It may just be an overly tight thread, too.

Jon