DBH 8251 radial shaft seal — 54 x 73.5 x 8

DBH 8251 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 8251 and any equivalents.

Part number 8251 belongs to the DBH line of radial shaft seals. It is a lip seal: it sits on the rotating shaft, presses against the housing bore, and keeps lubricant inside while keeping dust, water and particles out. The published size is 54 mm shaft, 73.50 mm housing, 8.00 mm height, which puts it in the mid-size range of transmission and rotating equipment. Seals are wear parts, so the usual reason to buy one is oil weeping or contamination getting in.

Reading the code: 8251 is the item number, and Lx describes how the lip and the metal body are built. That geometry decides how the lip rides on the shaft and how the outer case holds in the cavity. The three values to check are shaft 54 mm, housing 73.50 mm and height 8.00 mm. Match all three against the seal you pull out and you have direct interchangeability.

Where this size shows up: gear reducer boxes, pumps, electric motors, transmission shafts and process equipment running continuously with oil or grease that has to stay put. It is also a common find on older or imported machines whose seal sizes are not the ones most suppliers keep on the shelf. Either way, the seal does two jobs at the same time, holding lubricant in and keeping the environment out.

Installation notes: clean the shaft and remove burrs, nicks and tool marks; clear the housing of any leftovers from the old seal. Wipe the lip with the same oil or grease the equipment uses before you seat the part. Drive it in with a tube or socket that contacts the outer diameter only, never the lip. If the shaft is worn or grooved, a correctly sized seal still may not hold, and a repair sleeve or a new shaft is the next step.

Quoting: send the shaft, housing and height dimensions, or just the code stamped on the metal body, plus a photo of the old seal. That is enough for us to locate the equivalent in DBH or another brand at the same size. The part number does not have to match; the three diameters and the lip type are what count. Message us on WhatsApp or by email with the part number and quantity, and we will also suggest alternatives in the same seals category if you want to compare.