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

DBH 9991/85 is a reference of radial shaft seal, within Seals. Request a quote for 9991/85 via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.

The DBH 9991/85 radial shaft seal is a lip seal that mounts in the housing and closes on the rotating shaft to retain lubricant and stop dust, water or particles from entering. Its dimensions are 20.00 mm shaft, 38.00 mm housing and 14.70 mm height, with Lx design. It is used in gearboxes, pumps, electric motors and power transmission equipment where bearings must be protected and lubrication kept inside the assembly.

This item is a radial shaft seal from the DBH line, identified by the code 9991/85. Its published attributes are: shaft diameter 20 mm, housing diameter 38 mm and height 14.70 mm. The Lx design corresponds to a seal with a sealing lip and an outer metal body, intended to be press-fitted into the housing with the lip resting on the shaft. It is a direct replacement part: it is replaced by code and dimensions, not by approximation.

Typical applications are gearboxes, centrifugal pumps, electric motors, rollers and power transmission equipment. In all these cases the seal serves two functions: retaining the oil or grease that lubricates the bearing and preventing contaminants from entering from outside. When the seal wears out, lubricant loss appears and the bearing is left exposed; that is why it should be checked at every teardown and replaced if the lip is hardened, cut or has lost its elasticity.

To install it, verify that the shaft has no burrs or marks in the contact area and that the housing is clean and free of deformation. Lubricate the lip with the same oil or grease used in the equipment before inserting it, and place the seal perpendicular to the shaft, with a tube or shim that rests on the metal edge, never on the lip. If the shaft shows wear, consider a wear sleeve. Selection is defined by the three dimensions and by the type of design; if the design does not match, the seal may not seal even if the dimensions are correct.

If you need an equivalent, send us the code 9991/85 along with the shaft, housing and height dimensions, and a photo or sample of the old seal. With that data we can look for the alternative within the DBH line or other brands we carry. If the seal is mounted on equipment with bearings, we can also review the assembly and suggest a complete replacement of the seal and the associated bearing.

MR Accesorios Industriales carries the DBH brand within its seals and oil seals line. If you have the code at hand, write to us on WhatsApp and we will quote the 9991/85 seal or its equivalent. We can also advise you on installation and dimensions if the original seal is no longer legible.