Timken are manufacturers of extra large radial ball bearings. Their XLS Series are made in the Conrad and maximum capacity filling slot designs. Features include a bore size range of 3 mm - 600 mm (0.12 in. - 23.62 in.). Applications include agriculture, automotive, chemical, utilities and industrial markets.
SKF offers MRC hybrid ceramic ball bearings in extra large sizes, suited for wind power generator applications. The extra large bore sizes are available in a 100mm to 160mm range. They also can be engineered with shields and seals. Custom designs are available.