Advanced Materials & Tribology supplies Entry Pinch Roll Bushing. Advanced Materials & Tribology offers a wide range of Oil-less self-lubricated Bearings and Plates, Self Lubricating Bushes and Pump Bearings. Advanced Materials & Tribology is an ISO accredited company. The Entry Pinch Roll Bushing is used in the outer wall of the annealing furnace and has the ability to compensate for shaft expansion from cold start-up to production temperature levels.