Recently, I purchased a spherical bearing for my industrial machine. As a new buyer I found this product to be an excellent addition to my machinery .It works fantastically, offering GREAT precision and speed to my equipment. The bearing sits in the joints of machine parts, ensuring smooth operation. As a result of using this product, I found that it increased efficiency and productivity of my machinery. It is truly a great investment for those looking to upgrade their Power Transmission products. The only con I could mention is that it is slightly expensive, however, the quality compensated for the price. Highly recommended for industrial and scientific usage!