The Igus A181SM-5055-30 is a self-lubricating, maintenance-free, and non-corrosive bearing made of tribologically optimized, high-performance plastic. It has a shield on one side with a recessed opening, and is designed as an addition to a range of open, self-retaining, maintenance-free, and grease-free plastic bearings. The A181SM-5055-30 can be used in wiper seals, slide profiles, distributor pins, and linear bearings. The bearing is designed to minimize wear and friction and to be able to withstand reductions in the direction of opening, eccentric forces, and minor displacements. It also features a lubricant-free surface and special polymers to allow for long, maintenance-free operation.