The IKO NAU4924UU is part of the Roller Bearings product series. Its listed internal structure is Cage Type, and the product detail describes it as a caged roller bearing with an outer ring that has oil holes and seals.
The supplied data lists the following measurements for the NAU4924UU:
The bearing material is listed as High Carbon Chrome Steel; the product detail also identifies the material as high carbon steel.
The supplied product data lists a basic dynamic load rating of 146000 N and a basic static load rating of 268000 N. The design includes seals and an outer ring with oil holes. These details are based only on the provided product information.