It is used for rotating parts of Pon confectionery machine. It is a part where heat is also applied, although it performs grease up regularly, etc. There are also damage such as fallen balls, but if this is cheap, it can be used with consumables, disposable feeling.
Although it may not be useful to consider the price, it is 12.0 mm thick in catalog size, but in reality, it is only 11.9 mm, it is unusable for parts that need accuracy. An error of 0.1 mm is a little too big.