DBH 8404 radial shaft seal — 52 x 68 x 7.5/12.5

DBH 8404 is a reference of radial shaft seal, within Seals. Request a quote for 8404 via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.

The DBH 8404 seal is a lip radial shaft seal designed to close off the passage of oil or grease at the point where a shaft rotates inside a housing. Its job is to keep lubricant inside the mechanism and block dust, water or particles that accelerate wear. It is used in gearboxes, pumps, electric motors and power transmission equipment, where the shaft rotates continuously and sealing is critical to bearing service life.

This item is a DBH radial shaft seal with designation 8404. Its dimensions are 52 mm shaft diameter, 68 mm housing diameter and a height of 7.50/12.50 mm, meaning a profile with two possible mounting heights depending on how it is seated. The stated design is A 103, which defines the geometry of the lip and the metal body. It is a single-lip seal, with an internal spring, for rotating shafts with permanent lubrication.

Typical applications for a seal of this size appear in gearboxes, centrifugal pumps, electric motors, compressors and power transmission equipment. It is also found in agricultural and industrial machinery where shafts rotate inside a lubricated housing. In all these cases the seal works against the environment: it retains the oil and prevents contaminants from entering that could damage bearings, gears or bushings.

To install it, check that the shaft and housing diameters match the stated 52 mm and 68 mm, and that the chosen height corresponds to the available space. The lip must be lubricated and the shaft free of burrs or marks, with a suitable surface finish. If the shaft is worn, it is worth evaluating a seal with an offset lip before forcing the installation.

To quote part number 8404 or the dimensions of the old seal: shaft diameter, housing diameter and height, send them to us. With that data we look for the alternative within the DBH line or other brands we sell. We can also advise you if design A 103 is not the right one for your equipment.

MR Accesorios Industriales sells the DBH brand. If this seal is for your equipment, send the part number 8404 by WhatsApp and we will send you a quote. If you are unsure about the size, ask us before buying: it is faster than taking it apart twice.