This 61901 bearing is an Open Type Thin Section deep groove radial ball bearing with a Normal Radial Internal Clearance
LWHT25 C1 R660 T1 H S2 Non-Maintenance Free Standard Flange Type Top Mounting Linear Way Unit One Carriage 660mm - Rail Length Light Preload High Accuracy Class S2 Specification
LWHT30 C1 R480 T1 H S2 Non-Maintenance Free Standard Flange Type Top Mounting Linear Way Unit One Carriage 480mm - Rail Length Light Preload High Accuracy Class S2 Specification
LWH15 C1 R900 T1 H S2 Non-Maintenance Free Standard Flange Type Bottom Mounting Linear Way Unit One Carriage 900mm - Rail Length Light Preload High Accuracy Class S2 Specification
CRWG 6 350 Anti Creep Cage Crossed Roller Way Width - 31mm Way Length - 350mm High Carbon Steel
NNU4936BK/SPW33 - SKF Precision Cylindrical Roller Bearing - 180x250x69mm 100X150X24MM This 61901 bearing is anNNU 49 36 BK SP W33 Double Row No Flanges on Inner Ring Wide, Extra Light Series 180mm Bore Size Modified Internal Design, Tapered Bore, Taper 1: 12 Machined Brass Cage, Roller Centred Precision Rating Standard Radial Internal Clearance C1 Annular Groove and Three Lubrication Holes in the Outer Ring