DBH 5939 radial shaft seal — 31.75 x 50.8 x 11.11

DBH 5939 belongs to radial shaft seal, part of our Seals range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for 5939 and any equivalents.

The DBH 5939 is a radial shaft seal built for rotating shafts, and its job on a machine is straightforward: hold lubricant where it belongs and keep dust, water and particles out of the housing. Left unprotected, those contaminants work their way into bearings and gears and shorten their life. This seal measures 31.75 mm at the shaft, 50.80 mm at the housing bore and 11.11 mm in height, and it uses the Mz design. MR Industrial Accessories supplies this brand and helps you match the right seal to your equipment.

The code 5939 identifies a radial shaft seal from the DBH brand. Reading the size is simple once you know the order: first the shaft diameter, then the housing bore, then the height. Here that gives 31.75 mm on the shaft, 50.80 mm in the housing and 11.11 mm wide. The Mz design means the seal has a sealing lip backed by a spring, so the lip stays in contact with the shaft as it turns. The elastomer compound resists oils and greases, and the metal case holds its shape when the seal is pressed into place. Gearboxes, pumps and motors all depend on this kind of part to stay sealed.

You will find seals in this size range on gearboxes, centrifugal pumps, electric motors, conveyor rollers and other power transmission equipment. In each case the seal keeps lubricant from escaping and blocks contaminants from getting in, which is what protects the bearings and gears inside. Industrial machinery, agricultural equipment and vehicles commonly use this configuration. A 31.75 mm shaft running at moderate to high speed is well within what this Mz design is intended for.

Installation calls for a few checks before you press anything in. Confirm that the shaft and housing measure what the seal expects. The shaft should be clean, free of burrs and scratches, and lightly lubricated before the seal slides over it. Face the lip toward the lubricant side. Apply pressure evenly around the outer edge, never on the lip itself. If the shaft surface is worn, an auxiliary lip or a wear sleeve is worth considering. Speed, temperature and the fluid being retained all play a role in selection.

If you need a seal equivalent to the 5939, the fastest route is to send the code or the three dimensions by WhatsApp or email. From there we can look at alternatives in other brands or configurations while keeping the tolerances and design your equipment requires. We can also help when mounting space is tight or when operating conditions are severe. Send the part number and we will come back with concrete options.