DBH 9978/85 radial shaft seal — 31 x 44 x 8.5/4

DBH 9978/85 is a reference of radial shaft seal, within Seals. Request a quote for 9978/85 via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.

The DBH 9978/85 radial shaft seal is a lip seal that closes off the passage of oil or grease between a rotating shaft and its housing. Its A 192 design and its dimensions of 31 mm shaft, 44 mm housing and 8.50/4.00 mm height place it in applications where there is little axial space and a reliable barrier against leaks and contaminants is needed. MR Accesorios Industriales sells it as part of its line of seals and oil seals for equipment maintenance and repair.

This DBH 9978/85 seal has a shaft diameter of 31 mm, a housing diameter of 44 mm and a height of 8.50/4.00 mm. The A 192 design corresponds to a configuration with a sealing lip and a metal body that is press-fitted into the housing. The double height indicates that the mounting section and the lip section have different thicknesses, which is common when the available space is limited. It is a component of the radial shaft seal category, intended for rotating shafts with permanent lubrication.

It is used in gearboxes, pumps, electric motors, drive shafts and process equipment where lubricant must be prevented from escaping and dust or water from entering the bearing. It also appears in agricultural, road and material handling applications, where the seal protects bearings and bushings from external contamination. In all these cases it works together with a machined shaft and a housing with a surface finish suitable for the lip to seal evenly.

To install it, check that the shaft has no burrs or marks and that the housing is clean and free of deformation. Lubricate the lip with the same grease or oil used in the equipment before inserting it, and use a tube or shim that pushes on the outer diameter, never on the lip. If the shaft shows wear, consider a seal with an offset lip. The selection depends on speed, temperature and the type of lubricant, data that should be confirmed against the manufacturer's data sheet.

If you need an equivalent or a different size, send us the part number 9978/85, the shaft and housing dimensions, and a photo of the old seal if you have it on hand. With that data we can look for an alternative within the DBH line or other brands we sell. We can also advise you if the housing has a shoulder or if the axial space is critical, so that the seal is not mounted out of position.

MR Accesorios Industriales sells the DBH brand as part of its catalog of seals and oil seals. If you want a quote for this seal, send the part number 9978/85 by WhatsApp and we will reply with the available information.