I understand the concept of inserts, it's nothing new IMO.
I don't care for the Nova OEM inserts. How they fit, the eased off internal threads, etc....
While I don't know (or want to know:D ) why you have twenty, IMO VicMarc machining and tolerances are better, the backplate and insert are much more...
The machining quality/tolerances with Teknatool was never top tier IMO. Then let the QC slip and you get what you get.
I have some Nova chucks and I...
The first photo looks almost like an acme thread more than a buttress thread with the peak of the thread flattened off so much, very strange. I don't...