Hydraulic sleeves

The hydraulic sleeve is a tapered sleeve with ducts and grooves to inject oil under pressure between the contact surfaces. The oil film reduces friction, and therefore allows mounting and dismounting large tapered bore bearings without blows or heat and without damaging the shaft or seat. It is the usual option for large bearings in mills, fans, pumps and heavy machinery.

Designations follow the format OH plus size and the letter H, as in OH2332H and OH2334H from BGL, OH2356H and OH3056H from Timken or OH 3040 H and OH 2344 H from SKF. The brand may write it with or without spaces, but it is the same nomenclature. The digits combine the bearing dimension series with a size code, and that number is not the shaft diameter; it should always be cross-referenced with the bearing designation.

To choose a hydraulic sleeve, start from the bearing to be mounted: its designation, tapered bore and shaft diameter. Mounting requires a hydraulic nut and an oil injection pump, along with connection accessories, and is controlled by measuring axial advance. It is applied to spherical roller bearings and others with tapered bore on transmission shafts and process equipment.

At MR we work with hydraulic sleeves from BGL, Timken and SKF. Send us the sleeve code or the bearing designation and shaft diameter, and we will indicate the reference and the equivalence between brands. We also quote the hydraulic nuts and injection pumps used with each sleeve. Request a quote by part number at MR via WhatsApp or email and we will respond promptly.