Locomotive Traction Support Bearing made from Gatke #398 Phenolic material.
Gatke bearings are built tough to withstand the harshest applications. Made of high-strength fabrics and special long-lasting resin compounds that are molded under heat and extreme high pressure. Their extreme hardness makes them unbelievably tough and long wearing and are also very resilient which means they can withstand repeated shocks and heavy loads that literally destroy metal and plastic bearings. In fact, you can run Gatke bearings without lubrication and they won’t create the galling and scoring that would result with metal bearings.