RNA6910 58x72x40mm Heavy Load Machined Needle Bearing Open Type For Construction Machinery Gearbox Transmission Parts Product Overview RNA6910 is an open double-row solid outer ring needle roller bearing without inner ring, standard dimension 58×72×40 mm. It is precisely manufactured from high-performance GCr15 bearing steel, fitted with stamped steel cage to stably retain two rows of needle rollers.Without independent inner ring, the quenched and precision-ground shaft