Product Details
The Iko shell type needle roller bearing, part number YB912/MF3, is designed with a 9/16 inch bore, a 3/4 inch outer diameter, and a width of .750 inches. This bearing features an outer ring constructed from accurately drawn thin special steel plate and includes needle rollers, with the option of a retainer. Known for their minimal sectional height and weight, shell type needle roller bearings boast relatively high load ratings. The design can accommodate high-speed applications when utilizing a retainer and thrust ring to accurately guide the rollers, while the grease retained type is suited for heavy load, low-speed scenarios. Unlike other needle roller bearings, the shell type is not pre-packed with lubricant, necessitating proper lubrication during use. Typically employed with shafts lacking inner rings, it is recommended that a shaft surface finish of 0.2µMRA or less and a shaft hardness of HRC 58 to 64 be maintained; otherwise, Iko inner rings are advised. The accuracy of the outer ring should be noted, as it is susceptible to deformation from heat treatment due to its thin cross section, making direct measurements impractical. Standard mounting dimensions for shaft and housing diameters apply, with an outer ring width tolerance of +0 to -0.25 mm.
