DBH 8509Pol radial shaft seal — 90 x 110 x 8.5/10

DBH 8509Pol 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 8509Pol and any equivalents.

The DBH 8509Pol is a radial shaft lip seal designed to keep lubricant in and contaminants out where a shaft turns inside a housing. Its Lx-R-AH build pairs a sealing lip with a dust lip and a reinforced body, which suits equipment running in moderately dirty conditions. You will find it in gearboxes, pumps, motors and other rotating power transmission assemblies. MR supplies this brand and can help you verify the size before you request a quote.

The code breaks down simply: DBH is the seal line, 8509Pol is the item reference, and the three figures describe the fit. Shaft 90 mm, housing 110 mm, height 8.50/10.00 mm. The two height values let the seal seat in cavities whose tolerances vary, while the lip still maintains contact on the shaft.

The Lx-R-AH designation tells you what is inside the profile: a primary sealing lip, a secondary dust lip and a reinforced outer body. Together they hold oil or grease in place and keep dust, water and particles away from bearings and gears. That combination is why this seal appears on gearboxes, speed reducers, centrifugal pumps, electric motors, mixer shafts, conveyors and agricultural or industrial machinery with continuous rotation.

Installation matters as much as the size. Inspect the shaft for the specified diameter and remove burrs or deep scratches, since a rough surface wears the lip quickly. The housing bore should be clean and undistorted. Apply lubricant to the lip, then press the seal in squarely, without angled hammer blows. In very dusty service, the dust lip helps, but a more protective seal design may be worth considering.

When you ask for a quote on a replacement or equivalent, include the full part number plus shaft, housing and height measurements. Tell us the equipment type, the lubricant and the operating conditions. That information lets us review options within the same line or from other brands we carry, and we confirm the manufacturer's data before quoting. Not every size interchanges, so checking first avoids a failed installation.