This single-row deep groove ball bearing carries radial loads and moderate axial loads, with a solid brass cage (M) guiding the balls at the upper end of the permissible speed range. Bore diameter is 500 mm, outside diameter 620 mm, width 56 mm, net mass 38.7 kg. Limiting speed is 1710 1/min, reference speed 1060 1/min. The C3 internal clearance compensates for interference fits and thermal expansion of the shaft during operation, keeping the running clearance within the intended range. As an open bearing, sealing and lubrication must be provided externally, and the solid brass cage construction supports continuous operation at higher rotational speeds within its size range.