The IKO IRT1515 is an Inner Rings series metric inner ring with a 15 mm shaft diameter, 15 mm inside diameter, 18 mm outer diameter, and 15.5 mm width. Additional listed values include rs min. 0.3 mm, da min 17 mm, and da max 17.5 mm.
The product data identifies the IRT1515 as an Inner Ring, Metric, For Shell Type. The detail information lists high carbon steel, while the structured bearing material field lists high carbon chrome steel.
The supplied product data states that the IRT1515 is to assemble with TA1815Z. Under assembled bearings, TA 1815Z is listed for the TA_Z and TAM group; the TLA_Z, TLAM, YT, and YTL fields are listed with no matching bearing.