Same basic roller and raceway design as the TTHDFL, except that the lower race is composed of two pieces whose faces are spherically ground to permit self-alignment under TTHDFLSA THRUST BEARINGS conditions of initial misalignment. TTHDFLSA bearings should not be used if dynamic misalignment (changing under load) is expected.Types TTHDFL, TTHDFLSA, TTHDFLSX and TTHDFLSV heavy-duty thrust bearings have one tapered raceway, one flat raceway and controlled-contour rollers to optimize stress distribution over the contact surface. These designs combine features offering the highest possible capacity of any thrust bearing of their size and providing superior static thrust capacity. The designs were originally SKF 6312 Bearing developed for metal scewdown rolling mill (breaker block) applications. They also are used in heavily loaded extruders, cone crushers and other applications where a wide range of operating conditions are found.