DBH 1311 radial shaft seal

DBH 1311 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 1311 and any equivalents.

A radial shaft seal such as the DBH 1311 keeps lubricant where it belongs and keeps dust, water and chips out. It fits a 90 mm housing bore with a 10 mm height, and its A 378 design sets the lip and metal case geometry. Pumps, motors, reducers and gearboxes rely on this kind of part every day, because bearing and gear life depends on the sealing point staying clean and oil-tight.

This is a contact lip seal: an elastomeric sealing lip vulcanized to a steel case. The case is pressed into a cylindrical housing and stays put; the lip rides against the rotating shaft. In the DBH 1311 designation, 1311 points to the size and construction type within the series. Housing bore 90 mm, overall height 10 mm, A 378 lip and body geometry.

You will find it in centrifugal pumps, electric motors, speed reducers, gearboxes and other power transmission equipment, as well as machine tools, compressors and roller systems. Two jobs happen at once: oil or grease is held inside, and outside contamination is blocked. Treat it as a preventive maintenance item rather than something to replace after a failure.

Before fitting a replacement, confirm the housing bore is 90 mm and the height is 10 mm, and check that the shaft matches the A 378 design. The shaft surface should be smooth and free of burrs or nicks that could cut the lip. Lubricate the lip with the same lubricant used in the equipment, then press the seal in squarely with a flat driver, applying force on the outer case and never on the lip. If the shaft shows a groove from the old lip, a seal with the lip in a different position is worth considering.

Looking for an equivalent? Send the full part number, the housing and shaft measurements, and a photo of the old seal or the bore. With that we can check options in the DBH line or in other brands we carry, while keeping the A 378 geometry. We can also tell you whether a shoulder in the housing changes the choice, or what to do when the original number is no longer listed.

MR Industrial Accessories supplies the DBH brand. Quotes are handled by part number over WhatsApp or email, and our team replies promptly, suggests equivalents and helps you match the right seal to the equipment.