DBH 9991/85 radial shaft seal — 20 x 38 x 14.7

DBH 9991/85 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 9991/85 and any equivalents.

The DBH 9991/85 is a radial shaft seal that presses into the housing and rides on the rotating shaft, holding lubricant in and keeping dust, water and particles out. Published dimensions are shaft 20.00 mm, housing 38.00 mm and height 14.70 mm, in the Lx design. It is found in gearboxes, pumps, electric motors and power transmission equipment where bearings need protection and the oil or grease has to stay in place.

The 9991/85 belongs to the DBH line of radial shaft seals. Reading the code alongside the dimensions is the fastest way to confirm a match: 20.00 mm at the shaft, 38.00 mm at the housing bore and 14.70 mm in height. The Lx design uses a sealing lip with an outer metal body, so the seal is press-fitted into the housing while the lip contacts the shaft. Replacement is done by code and dimensions rather than by eye.

Gearboxes, centrifugal pumps, electric motors, rollers and power transmission assemblies are the usual homes for this seal. It does two jobs at once: it keeps the oil or grease that lubricates the bearing inside the assembly, and it blocks contamination from outside. A worn seal shows up as lubricant loss, which leaves the bearing exposed. That is why the seal is worth checking at every teardown and replacing when the lip is hardened, cut or no longer elastic.

During installation, confirm the shaft contact area is free of burrs and marks, and that the housing bore is clean and undistorted. Coat the lip with the same oil or grease the equipment uses, then drive the seal in squarely, using a tube or shim that bears on the metal edge and never on the lip. If the shaft is worn, a wear sleeve is an option to consider. The three dimensions plus the design type define the selection; a design mismatch can leak even when the dimensions line up.

For an equivalent, send code 9991/85 together with the shaft, housing and height dimensions, plus a photo or sample of the old seal. With that information we can search the DBH line or other brands we carry. When the seal sits on equipment with bearings, we can also review the assembly and suggest replacing the seal and the related bearing together.

MR Industrial Accessories supplies the DBH brand within its seals and oil seals range. If you have the code on hand, message us on WhatsApp or by email and we will quote the 9991/85 seal or a suitable equivalent. We can also help with dimensions and installation if the original seal is no longer legible.