The APW 2P-21793400 Bearing Assembly PTFE works by making use of a low-friction fluoropolymer sleeve to support the swift linear or rotary movement in a mechanical housing. The unit is placed right between the stationary base bracket and the moving drive shaft and is the main point of load distribution. The assembly uses a hard outer casing that holds the polymer insert so that it sta... https://partsfe.com/2p-21793400-apw-ptfe-bearing-assembly