DBH 5508 radial shaft seal — 28 x 47 x 8

DBH 5508 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 5508 and any equivalents.

A rotary lip seal, the DBH 5508 keeps lubricant where it belongs and keeps dust, water and other contaminants out. It seats with its outer diameter in the housing and its flexible lip rides against the rotating shaft. The designation tells you the size: shaft 28.00 mm, housing 47.00 mm, height 8.00 mm, in the Mz design. Gearboxes, pumps and mid-size electric motors are the kind of equipment where this size shows up. MR Industrial Accessories supplies this brand and can walk you through the selection.

Reading the code is straightforward. The DBH brand identifies the line, 5508 is the item reference, and the Mz designation describes how the lip and the metal case are built. The three figures that matter for fit are d, D and h: 28.00 mm for the shaft, 47.00 mm for the housing bore and 8.00 mm for the height. Those are the numbers to check with a caliper before you order, because a seal that is off by a fraction will not hold.

Where does this size normally work? Any assembly with a rotating shaft that has to keep oil or grease inside: reducers, centrifugal pumps, electric motors, machine tools. You also find it on rollers, mixers and conveyors, usually sitting next to a bearing or bushing. Its job there is to shield the lubricant and the raceways from grit and moisture, which is what keeps those parts running their normal service interval.

Installation decides how long the seal lasts. Inspect the shaft for burrs, scratches or a worn track, and make sure the housing bore is clean and free of dents. Put a film of lubricant on the lip, then press the seal in with a tube or arbor that bears on the outer diameter only, never on the lip. The 8 mm height is the axial room you need to allow. If the shaft already shows a groove, an auxiliary lip version is worth considering. Speed, temperature and the fluid being retained drive the final choice.

Looking for a substitute? Send the complete code, the shaft and housing measurements, and a photo of the removed part if you have one. With that we can check the DBH line or another compatible option, including Mz seals in other heights or diameters. The more detail you give us, the more precise the answer you get back.

Quotes are handled by part number. Send the DBH 5508 code to MR Industrial Accessories on WhatsApp or by email and the team responds promptly, with equivalents and selection help if you need it. We serve customers throughout the United States and in several Latin American countries.