DBH 5209 radial shaft seal — 42 x 56 x 8

DBH 5209 is a reference of radial shaft seal, within Seals. Request a quote for 5209 via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.

The DBH 5209 radial shaft seal is a lip seal that blocks the passage of oil or grease between a rotating shaft and its housing. With a 42 mm shaft diameter, 56 mm housing diameter and 8 mm height, and design A 136, it is press-fitted into the housing and runs on the shaft with the lip in contact. It is a wear part: when it starts to fail, the typical lubricant stain appears and service is required.

The DBH 5209 is a single-lip radial shaft seal, with the dimensions given in its designation: 42.00 mm shaft diameter (d), 56.00 mm housing diameter (D) and 8.00 mm height (h). It corresponds to design A 136, which defines the geometry of the lip and the metal body. The sealing lip runs on the shaft with slight interference; the outer body is press-fitted into the housing. The lip elastomer provides the effective seal, while the internal spring maintains contact pressure.

It is used in gearboxes, pumps, electric motors, transmission shafts and process equipment where a shaft rotates inside a housing and the lubricant must be retained. It also appears in applications with dust or water, where the seal prevents contaminants from entering. It is commonly found in rotating equipment maintenance: when the seal hardens or wears, it starts to leak oil and must be replaced before the problem affects the bearing or the shaft.

To select it, verify that the shaft diameter, housing diameter and height match the original seal. Check the condition of the shaft: if it is worn, scored or has a marked track, the new lip will not seal properly and it is advisable to repair it or use a wear sleeve. During installation, lubricate the lip with the same service oil or grease, insert the seal perpendicular to the shaft and tap only on the outer ring, never on the lip. If the housing has burrs, clean it before installing.

To quote 5209, send us the shaft diameter, housing diameter and height you measured, plus a photo of the old seal if you have one. With that data we look for the equivalent in the DBH line or in another brand we carry. We can also verify design A 136 against the manufacturer's data sheet to confirm that the lip and body geometry matches your application.

MR Accesorios Industriales carries the DBH brand within its line of seals and oil seals. If you already have part number 5209, send it by WhatsApp along with the quantity and we will send you the quote. If you are unsure about the size, write to us anyway: with the shaft and housing dimensions we will help you identify the correct seal.