This 31309J bearing is a metric taper roller bearing
LWLG7 C2 R150 T1 H S2 Non-Maintenance Free Long Stainless Steel Miniature Linear Way unit Two Carriages 150mm - Rail length Light Preload High Accuracy Class S2 Specification
This 3MM9117WICRSUM bearing is a Super Precision Angular Contact Bearing with a 25° Contact Angle and a Phenolic Cage
Light Series 90mm - Bore Size Open Type Axial Internal Clearance Greater than Normal
719 26 CD G B /P4A Series - SKF - Extremely Light Bore Size - 130mm 15 Degree Contact Angle Single Universal Medium Preload Precision Rating
23256 CCK /W33 SKF Spherical Roller Bearing - 280x500x176mm 71901ACEGB/P4A This 31309J bearing is aThis 23256 CCK W33 bearing is a Spherical Roller Bearing with a guide ring centred on a flangeless inner ring, two stamped steel cages, a 1: 12 tapered bore, an annular groove in the outer ring with three lubrication holes and a normal radial internal clearance. The bearing's dimensions are 280x500x176. 232 56 CC K W33 Heavy, Wide 280mm Bore Size Flangeless Inner Ring, Guide Ring Centred on the Inner Ring, Two Stamped Steel Cages 1: 12 Tapered Bore