Radial shaft seal DBH 9478Pol — 21.90 x 40.00 x 7.00/8.00

DBH 9478Pol is a radial shaft seal reference, within Seals. Request a quote for 9478Pol via WhatsApp or email with the quantity you need; we respond promptly with lead time and equivalents.

The DBH 9478Pol radial shaft seal is a lip seal that closes the passage of oil or grease between a rotating shaft and its housing. With 21.90 mm shaft diameter, 40.00 mm housing and a height of 7.00/8.00 mm, it is press-fitted into the housing and works on the shaft with the lip in contact. Its Lx-R-H design combines sealing lip, metal reinforcement and spring, a common configuration in small and medium-sized gearboxes, pumps and electric motors.

This DBH 9478Pol oil seal has a shaft diameter of 21.90 mm, a housing diameter of 40.00 mm and a height of 7.00/8.00 mm. The Lx-R-H design indicates sealing lip, reinforced body and retaining spring, the most widespread variant for rotating shafts with permanent lubrication. The DBH brand is a brand that MR sells, so the part number is identified exactly as it appears in the registry and is checked against the manufacturer's data sheet before quoting.

Typical applications for an oil seal of this size appear in gearboxes, centrifugal pumps, electric motors, compressors and power transmission equipment. In all cases it performs the same function: retaining lubricant inside the assembly and preventing the entry of dust, water or particles. It is also used as a secondary closure in bearings and bushings where axial space is limited.

To select the oil seal correctly, verify that the shaft and housing diameters match the values on the data sheet, that the available height accommodates the 7.00/8.00 mm and that the shaft surface is sound, free of burrs or deep marks. The lip must be lubricated during assembly and the seal is inserted perpendicular, with a press or support tube, never striking the lip. If the shaft shows wear, it is advisable to evaluate a repair sleeve or a nearby size.

If part number 9478Pol is not available or you need a different size, we can look for an equivalent in another brand or a variant of the same category. To do so, send us the part number, the shaft, housing and height dimensions, and a photo of the old oil seal if you have one. With that data we review sealing alternatives and confirm which option fits without modifying the housing.

MR Accesorios Industriales has been selling seals and oil seals for more than 80 years. If you want to request a quote for the DBH 9478Pol or ask about an equivalent, write to us via WhatsApp with the part number and dimensions. We will reply with the alternative that best suits your equipment.