Carbon Outsize Screw Shaft Collars Review

I recently purchased a screw-type collar coupling for use in my industrial machinery. It's made of carbon and is larger than usual collars, making it strong and reliable. The precision threading allows for an easy installation and secure hold. The quality is fantastic and the precision is unmatched. The only downside is that it may be too bulky for some applications. Overall, it's a great choice for anyone looking for a high-quality collar coupling in the industrial and scientific category.

Poor quality. I had to file id's drill bits just to put them on the shank. There were almost no threads and 3 out of 4 broke off when simply tightened. I ended up making my own substitutions.

Garbage. The inside diameter is too large and the set screw is so poorly machined that the shaft shoulder moves skewed when fully tightened. Just buy a good set instead of spending money like I did.