NSK spherical roller bearings

21308EAE4, 21308EAKE4 and 24020CK30E4 show numeric bases followed by letter and number groups. The first two share 21308 but have different endings; the third retains K30 in a different base's complete group. Preserve these differences. Identify the seat from product attributes and drawing instead of turning an isolated letter into a mounting instruction. EAE4, EAKE4 and CK30E4 remain complete without decoding meanings awaiting approval.

At a conveyor drum or process roller, load passes through the shaft and bearing to the housing. Establish which support locates the shaft axially and how movement at the other end is accommodated. The assembly drawing also distinguishes direct mounting from a sleeve arrangement. Record seat form and removed accessories: bearing outside diameter alone does not determine the parts accompanying a replacement.

Give MR Accesorios Industriales the complete code, quantity, shaft diameter, housing reference and any sleeve designation. Add marking photographs, equipment description, shaft orientation and observed conditions. Include documented clearance or fit requirements without replacing them with code interpretations. These references distinguish the bearing from accessories and prevent similar series or endings from becoming the sole basis for selection.