Radial shaft seal DBH 9129 — 40.00 x 50.00 x 7.00

DBH 9129 is a radial shaft seal reference, within Seals. Request a quote for 9129 via WhatsApp or email with the quantity you need; we respond promptly with lead time and equivalents.

The DBH 9129 radial shaft seal is a lip seal that closes off the passage of oil or grease between a rotating shaft and its housing. With a 40 mm shaft diameter, 50 mm housing diameter and 7 mm height, and Lx design, it is used in gearboxes, pumps, electric motors and transmission equipment to retain lubricant and stop the entry of dust and water. MR Accesorios Industriales carries this brand and advises you on choosing the right seal.

The DBH 9129 is a lip seal with spring, of Lx design, intended for rotating shafts. Its dimensions are 40 mm shaft diameter (d), 50 mm housing diameter (D) and 7 mm height (h). The elastomeric lip bears on the shaft and the spring keeps it in contact, while the metal body is press-fitted into the housing. This prevents lubricant leakage and the entry of contaminants. It is a wear part: when the lip hardens or becomes marked, it starts to leak.

It is found in gearboxes, reducers, centrifugal pumps, electric motors, compressors and power transmission equipment. Also in agricultural machinery, roller conveyors and transport systems. In all cases it performs the same function: separating the lubricated side from the environment. If the equipment works with a lot of dust, water or pressure washing, it is advisable to check the seal more frequently and evaluate variants with an auxiliary lip or dust guard.

For installation, check that the shaft is clean, free of burrs and scratches, and that the sliding surface has the appropriate hardness and finish. Lubricate the lip with the same grease or oil as the equipment before inserting it. Place it perpendicular to the shaft, without striking the lip, using a tube or press that bears on the outer diameter. If the housing has burrs, pass a fine sandpaper over it. A poorly installed seal leaks even if it is new.

If you need an equivalent or a nearby size, send us the part number 9129 along with the shaft and housing dimensions. It also helps if you tell us the brand and model of the equipment where it is mounted. With that data we look for alternatives in other brands or in our in-house manufacturing line, always respecting diameters and height. If space allows, we can offer you design or material variants according to the fluid and working temperature.

MR Accesorios Industriales carries the DBH brand and has more than 80 years of experience in bearings, power transmission and seals. To request a quote for this seal or ask about a different size, write to us by WhatsApp with the part number 9129 and the dimensions. We will reply with the available alternative and coordinate shipping.