DBH 9904 radial shaft seal — 40 x 69 x 15.4

DBH 9904 is a reference of radial shaft seal, within Seals. Request a quote for 9904 via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.

The DBH 9904 seal is a single-lip radial seal that mounts on the shaft and closes against the housing to retain lubricant and block the entry of dust, water or particles. With a 40 mm shaft diameter, 69 mm housing bore and 15.40 mm height, this specific size is used in gearboxes, pumps, electric motors and transmission equipment where there is continuous rotation and contact with oil or grease. MR Accesorios Industriales carries this brand and advises you so you choose the correct seal for your application.

The DBH 9904 is a radial shaft seal of design A 345, with the dimensions shown on its product page: 40 mm shaft diameter (d), 69 mm housing bore diameter (D) and 15.40 mm height (h). Design A 345 corresponds to a seal with a sealing lip and an outer metal body, intended for rigid housings and rotating shafts. The 9904 nomenclature identifies this size within the DBH line, and any question about tolerances or lip material is confirmed against the manufacturer's data sheet before quoting.

This type of seal is used in equipment where a shaft rotates inside a housing with lubricant: gearboxes, centrifugal pumps, electric motors, conveyor rollers, mixers and belt or chain drives. It also appears in applications exposed to dust or water, where the lip must maintain dynamic sealing. If your equipment operates at elevated temperature or high peripheral speeds, it is advisable to verify the lip material and the type of fluid before defining the replacement.

To install a seal such as the 9904, the shaft must be clean, free of burrs or wear marks in the sealing area, and the housing must be in good condition and with the correct diameter. The seal is inserted perpendicular, without striking the lip, using a tube or spacer that rests on the metal edge. Before installing it, lubricate the lip with the same oil or grease used in the equipment. If the shaft shows a marked track, consider a wear sleeve to avoid repeating the failure.

To quote a seal equivalent to the 9904 because the housing or shaft has a different diameter, send us the full part number, the dimensions measured with a caliper and a photo of the old seal. With that data we search the DBH line and other compatible alternatives. We also tell you about the variant with a double lip, with a spring or with a material resistant to higher temperatures, always confirming against the manufacturer's technical data sheet.

To request a quote for the DBH 9904 seal or ask about an equivalent size, send the part number on WhatsApp to MR Accesorios Industriales. We reply with the quote for the size and the alternatives that best suit your equipment. If you have doubts about the installation or the condition of the shaft, write to us and we will help you so the replacement goes well the first time.