DBH Seals

A radial shaft seal (also called an oil seal) keeps the grease or oil in a bearing from escaping out of the housing, and keeps dirt, water or dust from entering from outside into the bearing. It is a small, inexpensive part compared with what it protects, but a poorly chosen or worn seal is one of the most common causes of a bearing washing out and failing prematurely.

The designation of a DBH seal describes three dimensions and a design code: the shaft diameter (d, where the rotating shaft passes through), the housing diameter (D, where the seal seats against the housing or support) and the height or width (h). The design code that follows the number —variants such as those listed in our catalogue— identifies the type of sealing lip and the elastomer material. To order the correct replacement, these three dimensions are enough: if you have the old seal, measure it with a caliper before discarding it.

They are used in rotating shaft bearings on all kinds of machinery: electric motors, gearboxes, centrifugal pumps, transmissions, industrial fans and agricultural equipment. In Argentina it is one of the most requested replacement parts in plant maintenance, because it degrades with use —the lip wears, the elastomer dries out with heat— even if the bearing it protects is still in good condition.

When choosing a seal, it is worth looking beyond the size: the peripheral shaft speed (the higher the speed, the more heat the lip friction generates), the working temperature, which defines the elastomer material, and whether the environment has dust or pressurized liquids, where a double-lip design is preferable. Installation is just as important as the choice: a seal installed out of square or with the lip damaged by the shaft edge fails within a few weeks.

Seals are manufactured with the same three dimensions by several brands and origins, so it is common to find an equivalent from another manufacturer for a size that is temporarily unavailable. What does not change between brands is the size: if the shaft and housing match, the seal performs the same function regardless of who manufactured it.

If you have the old seal or the bearing that needs sealing, send us the three dimensions —or a photo with the caliper in place— via WhatsApp and we will confirm the part number and the available equivalent. MR Accesorios Industriales carries the most requested DBH designs on the Argentine market.

DBH Pol radial shaft seals are lip seals designed to prevent lubricant leakage and the ingress of contaminants on rotating shafts. They are mounted in gearboxes, pumps, electric motors and reducers, among other applications. Their design with a sealing lip and metal body allows them to work with moderate pressures and peripheral speeds typical of industry. At MR Accesorios Industriales we sell this line with standard sizes and specific designs for each need.

The designation of DBH Pol seals combines a sequential number with the suffix Pol, which identifies the category. For example, 1001Pol corresponds to a seal for a 25 mm shaft, 40 mm housing and 8 mm height, with design Lx-R-H. The code 1045Pol has a 50.8 mm shaft, 69.75 mm housing and 9.52 mm height, design Mz. Meanwhile, 1060Pol has a 47.63 mm shaft, 80.26 mm housing and 17.90 mm height, with design A 197. The suffixes and numbers indicate dimensions and construction variants, so it is always advisable to verify the complete code.

These seals are used in a wide variety of industrial equipment in Argentina: speed reducers, centrifugal pumps, electric motors, compressors, machine tools and gear transmissions. They are also present in the food, chemical, petrochemical and general manufacturing industries. Their function is to retain the lubricant inside the assembly and block dust, water or particles that could damage bearings and gears. Correct seal selection extends component service life and reduces unplanned downtime.

To choose the right seal, take into account the shaft diameter, housing diameter and available height. The lip design and material must be compatible with the fluid to be sealed and the working temperature. It is essential to verify the concentricity and surface finish of the shaft, as well as the alignment between shaft and housing. During assembly, lubricate the lip and use a suitable tool so as not to damage it. If the seal works under pressure, consider a design with reinforcement or a secondary lip.

When replacing a seal, it is common to find equivalences between different brands. Although each manufacturer has its own codes, standard dimensions (shaft diameter, housing and height) usually match. For safe interchangeability, compare not only the dimensions but also the design type and lip material. At MR Accesorios Industriales we can advise you to find the DBH seal that best suits your equipment, or its equivalent in other brands we sell.

If you need a quote for DBH Pol radial shaft seals, send us the complete code or the dimensions of your application via WhatsApp. At MR Accesorios Industriales we reply with the alternatives we have to offer. With more than 80 years in the market, we back every inquiry with technical experience and personalized service.

DBH …VIT radial shaft seals are lip seals designed to prevent oil or grease leaks and the ingress of contaminants in equipment with rotating shafts. They are mounted in cylindrical housings and act on the shaft through an elastomeric lip that maintains dynamic contact. They are suitable for pumps, motors, gearboxes and bearings, among other industrial applications. MR Accesorios Industriales offers this line with more than 80 years of experience in the industry.

The designation of the DBH …VIT seals combines a four-digit base number and the suffix Vit, which identifies the series. For example, 1122Vit, 1125Vit and 1130Vit share the same scheme, but each code defines a specific set of shaft, housing and height dimensions. In the examples, the design is indicated with abbreviations such as A098-R AH or Lx-R AH, which provide guidance on the lip configuration and the elastomer type. To select the correct seal, it is essential to cross-reference the code with the standardized dimensions.

These seals are used in a wide variety of industries in Argentina, such as food, petrochemical, mining and automotive. They are found in centrifugal pumps, electric motors, gear reducers, conveyor rollers and spindles. Their main function is to retain lubricant and exclude dust, water or particles that accelerate wear on bearings and shafts. The choice of lip and spring material depends on temperature, peripheral speed and the fluid to be sealed.

For correct installation, check that the shaft has adequate hardness and roughness, without grooves or burrs that damage the lip. Lubricate the seal before inserting it and use an installation tool that presses on the outer diameter, never on the lip. Alignment between shaft and housing must be precise to avoid uneven wear. If the equipment operates with high vibration or misalignment, consider a design with greater flexibility or an auxiliary lip. Lubricating the lip with the equipment's grease or oil extends its service life.

Regarding equivalents, radial shaft seals are identified by their standardized dimensions: shaft diameter, housing diameter and height. Different brands may offer products with similar dimensions, but it is essential to verify lip design, material and temperature range before interchanging. Not all part numbers are directly interchangeable; a difference in the elastomer or spring can affect performance. Always consult a specialist if you have doubts about compatibility.

If you need to replace a seal, send us the complete part number by WhatsApp to MR Accesorios Industriales. With the part number and dimensions, we can advise you and quote the right option for your equipment. We work with in-house manufacturing to give you a reliable solution.