RKB QJ 230 angular contact ball bearing

RKB QJ 230 is a reference of angular contact ball bearing, within Bearings. Request a quote for QJ 230 via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.

The RKB QJ series angular contact ball bearing is a four-point contact bearing: the inner and outer rings allow the balls to work with two points of support, so the bearing can carry axial loads in both directions as well as radial loads. It is used in applications where a shaft must be located in both directions with limited space available.

The QJ series designation reads as a four-point contact code: the letters QJ identify the type, and the number that follows — as in QJ 202, QJ 203, QJ 205 or QJ 210 — indicates the size. The first two digits of the number relate to the bore diameter and the last one to the dimension series. Any suffixes appearing after the number indicate cage, internal clearance or sealing variants, as applicable.

These bearings are selected in industries in Argentina where axial and radial rigidity is needed with a single support: machine tools, gearboxes, pumps, fans, transmission equipment and assemblies where the shaft must be located in both directions. They also appear in low and medium speed applications where space is limited and the aim is to simplify the assembly.

To select the correct QJ, take into account the axial load in both directions, the rotational speed and the internal clearance. Mounting requires careful alignment between shaft and housing, and adequate lubrication — grease or oil — according to the operating conditions. If the environment has dust or moisture, it is advisable to evaluate sealed variants. The cage and clearance are selected according to the application.

Four-point contact bearings are interchanged between brands by their dimensional designation: an RKB QJ 205 can be replaced by an equivalent bearing from another manufacturer using the same nomenclature and dimensions. To do this, compare bore, outer diameter and width, as well as cage type and clearance. If you have another brand's part number, send it to us and we will tell you the equivalent.

If you need a bearing from the QJ series, send the part number by WhatsApp to MR Accesorios Industriales and we will quote it promptly. You can also ask us about other angular contact bearing series or any other part you need.