One Way Bearings
One-way bearing can rotate freely in one direction, but deadlock in the other direction. There are many rolling shafts, needle rollers or balls in its metal shell, while its shape of rolling housing (holl) makes it only rotate in one direction, and have a large resistance in the other direction (so-called one way). This kind of bearing is usually applied in textile machinery, printing machinery, automobile industry, household appliance and currency detector etc.