DBH 8252 radial shaft seal — 20 x 42 x 7

DBH 8252 belongs to radial shaft seal, part of our Seals range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for 8252 and any equivalents.

The DBH 8252 is a radial lip seal designed to prevent oil, grease, or water from escaping between a rotating shaft and its housing. It has a shaft diameter of 20 mm, a housing diameter of 42 mm, and a height of 7 mm, with an Lx design. This seal is commonly used in gearboxes, pumps, electric motors, and power transmission equipment to retain lubricant and block dust and dirt. MR Industrial Accessories supplies it as part of its seals line.

The DBH 8252 follows a standard size code: shaft 20 mm, housing 42 mm, width 7 mm. The Lx designation refers to the seal's construction, featuring a sealing lip and a metal casing that presses into the housing. Before replacing a seal, always confirm these three dimensions—shaft, bore, and width—to ensure a proper fit.

Seals of this size are typically found where a shaft rotates inside a lubricated housing. They appear in gearboxes, centrifugal pumps, electric motors, speed reducers, compressors, and machine tools. In dusty or wet environments, they also keep out particles that can wear bearings and gears.

Selecting a seal involves more than just dimensions. Shaft speed, operating temperature, lubricant type, and pressure all affect performance. The Lx design determines how the lip contacts the shaft and the type of spring or reinforcement. If the shaft is worn or has a groove, consider a seal with the lip in a different position or repair the surface before installation.

During installation, lubricate the lip with the same oil or grease used in the equipment. Check that the shaft is free of burrs or splines and press the seal in perpendicular to the shaft, avoiding side impacts. To request a quote for code 8252, provide the shaft diameter, housing diameter, and height, along with a photo of the old seal or equipment code. With that information, we can find an equivalent from DBH or another brand we carry.

MR Industrial Accessories offers the DBH brand within its seals and oil seals line. To request a quote for the 8252 oil seal or ask about an equivalent size, send the code via WhatsApp along with your equipment dimensions, and we will reply with the best matching option.