After machining a backplate with no discernible runout I found the chuck to have a runout of about .001 and when the collets are installed, just a tad little more. If you are looking to do really critical work you may want to look elsewhere and spend a bunch more money. I have no complaints as I received exactly what was advertised and would recommend it to the home shop machinist.

I appreciated the schematic included in the description photos. I would have had no way of knowing it would fit my lathe without it. I have a Grizzly G0765 7x14 mini-lathe that is the same size as many of the Chinese mini-lathes. This bolted perfectly right on the face plate. I gauged it to make sure it was running true, and it does. Mine came with a wrench, so no need to purchase one. The only thing I would change about it is some way to grip the base while using the wrench on the nut. It is slick and with an oil film on your hands and the base and no grooves to hold with a wrench it is hard to hold while turning the nut with the wrench. I solved this with an old oil filter wrench that I taped a couple of pieces of old inner tube to for grip. It holds the base tightly so I can wrench it tight or loose. Easy in and out on the collets, it does a great job and runs true. Happy with it and it stays on my metal lathe 90% of the time.

works good

The media could not be loaded. This collet chuck registered exceptionally well on my Grizzley 8x16 lathe because the registration hole is the correct diameter, and there is no need for an adapter plate. Intially it had 0.0015" run-out in the collet seat, but after a series of indication tests on the chuck and spindle, I determinined that the threaded holes on the back of the chuck had some high spots around them. I lightly lapped the back side of the chuck on a granite slab. Now I get 0.0002" to 0.00025" run-out in the collet seat. I stamped an index mark on the chuck, and called it very good.

First off I am not a machinist by trade but... my Grandfather in the day had one of the largest machine shops in New England... I know what its like to hold a tenths.. With that said I ordered this adapter and used the standard screws that came with my lathe for the 4 jaw chuck and everything lined up perfect.. no visible play.. So I measured the outside adapter and only got 1 thou.. then I measured the nut on the spindle and that was 8 thou.. but its only the lock nut... Then I measured the inside and only out 2 tenths... I am waiting for the collet set to show up so I can chuck a pin and measure... but for what it is I could not be any happier.. So if you have a G0768 all you need is the 100mm version and should have everything else you need with the parts that came with the lathe...