DBH 8744 radial shaft seal — 75 x 108 x 10/20

DBH 8744 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 8744 and any equivalents.

Part number 8744 is a DBH radial shaft seal built for rotary shaft positions where oil or grease has to stay in and dust has to stay out. It presses into the housing and its flexible lip rides against the shaft. The dimensions to match are a 75 mm shaft, a 108 mm housing bore and a 10/20 mm height. Gearboxes, pumps and similar industrial drives rely on this style of seal to keep lubricant where it belongs and to protect nearby bearings from contamination.

The code breaks down simply. The 8744 number identifies the seal, DBH is the brand, and the size string gives the three measurements you need before ordering: shaft 75 mm, housing 108 mm, height 10/20 mm. The A 172 design refers to a metal-cased seal with a sealing lip, made to be press-fitted into the bore. A height written as 10/20 mm tells you the profile is not uniform: one section measures 10 mm and another reaches 20 mm, which suits housings with limited axial room. The elastomer compound is chosen to stand up to oils and greases.

Where does this seal typically show up? Reducers and gearboxes, centrifugal pumps, line shafts, electric motors, compressors and process equipment that runs continuously. In food, chemical and metallurgical plants, where a leak or an ingressing particle can disrupt production, the right seal also protects the bearings and gears around it. A radial lip of this type absorbs small shaft misalignment and vibration, as long as the shaft is ground to the correct size and the bore matches the stated diameter.

Installation decides how long the seal lasts. Check the shaft for hardness and surface finish, and remove burrs, nicks or wear marks that could cut the lip. Coat the lip with the same lubricant used in the machine, then drive the seal in with a tool that contacts the outer diameter only. Never push on the lip. Confirm that the housing has room for the 10/20 mm height. When specifying a replacement, look at peripheral speed, operating temperature and the fluid being sealed, and send us the original designation if it differs from 8744 so we can cross it.

For a replacement of part number 8744, the fastest route is to send the four key data points: shaft diameter, housing diameter, height and lip type. A photo or drawing of the housing also helps. Our team reviews the information, suggests an equivalent when needed and replies with a quote.