DBH 1289 radial shaft seal — 90 x 140 x 12

DBH 1289 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 1289 and any equivalents.

For rotating shafts measuring 90 mm in diameter, the DBH 1289 radial shaft seal provides a dynamic barrier that keeps oil or grease where it belongs and blocks dust, water and other particles from reaching bearings and bushings. It seats into the housing under press fit and contacts the shaft directly, so the sealing action happens at the lip.

The size breaks down as follows: shaft 90 mm, housing 140 mm, height 12 mm. In the DBH line, 1289 pinpoints this exact size. The Lx configuration means a single sealing lip with a spring, chosen when the shaft turns and the medium to be retained is oil or grease. An elastomer body is bonded to a metal case, which keeps the seal rigid and holds it firmly in the housing bore.

Typical installations include gearboxes, pumps, electric motors, transmission shafts and continuous process lines. Food, chemical and cement plants rely on this type of seal, as do water treatment facilities, because keeping external contamination out directly affects how long bearings last. Agricultural machinery and road equipment working in dusty conditions are another common home for it.

Selection starts with three checks: shaft diameter, housing diameter and height must all match the mounting dimensions. The shaft surface should be ground and free of burrs, since a rough finish wears the lip faster. Lubricate the lip with the same oil or grease the equipment uses, and press the seal in with a support tube to avoid damaging it. If the shaft already shows a groove or wear, a seal with an auxiliary lip may be the better choice.

Have the code 1289 or your shaft and housing dimensions on hand? Send them over and we can point you to a suitable equivalent. MR also handles other seal configurations and brands when an application calls for something beyond the standard option.