DBH 5170Pol radial shaft seal — 30 x 55 x 9.5

DBH 5170Pol 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 5170Pol and any equivalents.

When a gearbox or pump starts weeping oil around the shaft, the first thing to check is the lip seal. The DBH 5170Pol is a radial shaft seal sized for a 30 mm shaft, a 55 mm housing bore and a 9.50 mm width. Its Lz designation tells you it is a lip seal with a spring, so it keeps contact on the rotating shaft in continuous duty. MR Industrial Accessories supplies this brand and helps you match the right seal to your equipment.

Reading the code is straightforward: DBH is the brand, 5170Pol is the item reference, and the three figures that matter at the bench are d = 30 mm, D = 55 mm and h = 9.50 mm. In other words, a 30 mm shaft, a 55 mm housing bore and a 9.50 mm seat depth. As long as your shaft and housing tolerances fall within what radial shaft seals call for, the seal drops into a standard bore with no machining required.

Seals in this size range turn up on gearboxes, centrifugal pumps, electric motors, reducers and other power transmission equipment. The job is always the same: hold oil or grease inside and keep dust, water and particles out. Once contaminants reach the bearings and gears, wear accelerates, so this is a part worth tracking in any preventive maintenance program.

Before you order, confirm three things: the shaft diameter is within the recommended tolerance for radial shaft seals, the housing bore and depth match the 55 mm and 9.50 mm figures, and your operating speed and temperature suit the lip material. At installation, coat the lip with the same oil used in the unit, keep the spring facing the fluid side, and seat the seal squarely without hammering on the lip.

If the Lz configuration does not fit your application, or you need a different lip style or material, send us the 5170Pol code or your shaft and housing dimensions. MR Industrial Accessories offers equivalents from several brands and configurations, and can point you toward the option that works best for your machine.

To get a quote, message us on WhatsApp with the code or the measurements from your equipment. We will come back with the quote and any alternatives that fit.