DBH 9091 radial shaft seal — 20 x 40 x 7

DBH 9091 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 9091 and any equivalents.

Part number 9091 belongs to the DBH line of radial shaft seals, a lip seal built for rotating shafts. Its size reads as shaft 20.00 mm, housing bore 40.00 mm and height 7.00 mm, so it keeps oil or grease where it belongs and blocks dust and other contaminants from working their way in. The Lx designation tells you the sealing element is a single lip backed by a spring, a configuration that holds steady contact against the shaft in everyday industrial service.

Reading the code helps when you are matching a seal to a drawing or a worn original. The three figures follow the usual order: d for the shaft, D for the bore in the housing, and h for the height. Here that means 20.00 mm on the shaft, 40.00 mm in the housing and 7.00 mm tall. The elastomer compound stands up to oils and greases at the moderate temperatures and surface speeds found in most plant equipment.

You will find seals like this one in centrifugal pumps, electric motors, gearboxes, compressors and power transmission assemblies. In each case the seal does two jobs at once: it holds the lubricant inside the housing and keeps dust, water and particles away from the bearings and gears. Because a worn lip can lead to unplanned downtime and costly damage, the seal earns a place on any preventive maintenance schedule.

Installation is straightforward if you prepare the shaft first. Check that hardness and surface finish are within specification and that there are no burrs, nicks or pull marks where the lip will ride. Coat the lip with lubricant before pressing the seal in, and confirm the housing bore is clean and undistorted. When you select a replacement, account for rotation speed, operating temperature and the fluid being retained, and keep the same dimensions and design as the original.

If you are cross-referencing an equivalent, send part number 9091 or the measurements of the seal you are replacing. The team can point you to the right item in the seals and oil seals line and suggest alternatives when a special configuration is needed. Quotes are handled by WhatsApp or email, and the reply comes back promptly with the technical details you asked for.