6209 Hybrid Ceramic Bearings can be made with chrome 52100 or stainless steel for the inside and outside race along with silicon nitride balls
7028ACD/P4ADGC Super Precision Angular Contact Spindle Bearing 140x210x33mm (Set of 2) 7028ACD/P4ADGC
Specifications Bore 80 mm O
7 kN Speed in grease = 32000 rpm Speed in oil = 48000 rpm Preloading force Fv L = 71 N Preloading force Fv M = 277 N Preloading force Fv H = 598 N Unloading force KaE L = 207 N Unloading force KaE M = 839 N Unloading force KaE H = 1879 N Axial rigidity Ca L = 51
SDA80X50S
Airtac Compact Air Cylinder, Double Acting Airtac TWM 6209 Hybrid Ceramic Bearings canSDA80X50S Airtac Compact Air Cylinder, Double Acting Compact pneumatic cylinder, double acting, 80mm Bore, 50mm Stroke, with Magnet, Female thread, PT thread type Acting Type Double Acting Airtac sda series Compact Air Cylinder Airtac Product Series Airtac SDA Compact Air Cylinder Bore Size 80mm Brand Airtac Component Type Compact Air Cylinder Magnet With Magnet Rod Type Female Thread Stroke Length 50mm Thread Type PT