DBH 1151 radial shaft seal — 15 x 21 x 3

DBH 1151 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 1151 and any equivalents.

The DBH 1151 is a radial shaft seal that keeps oil or grease contained where a shaft passes through a housing. It fits a 15 mm shaft, a 21 mm housing bore and a 3 mm width. The Lt design pairs the sealing lip with a metal body that holds lubricant in and helps keep dust and water out. You will find it in gearboxes, pumps, electric motors and other power transmission equipment.

Shaft 15 mm, housing 21 mm, width 3.00 mm. Those three figures are what you compare against the seal you are replacing. The Lt designation describes the lip geometry and the metal case, which together determine how the seal sits on the shaft and how it seats in the cavity. This is a radial sealing part: it transmits no load and no torque. Its job is to keep lubricant where it belongs and to block contaminants from reaching the bearing or mechanism.

Typical installations include gearboxes, variable speed drives, centrifugal pumps, fans, mixers and machine tools. It also suits low-speed shafts of small diameter where axial space is tight and a compact seal is required. In these arrangements it works alongside bearings, bushings or linear guides, shielding the lubricated zone.

Before fitting, confirm that the shaft and housing match the 15 mm and 21 mm of this seal and that the 3.00 mm width fits the cavity without distorting the lip. Lubricate the lip, press the seal in squarely and avoid pointed tools that can nick it. If the shaft shows burrs or wear, smooth them first so the lip is not damaged during assembly.

When you need an equivalent, send part number 1151 along with the dimensions of the seal you are replacing. We will check the DBH series against that data. We can also advise you if your housing or shaft tolerances differ from those of this item, so you get the right seal the first time.

MR Industrial Accessories supplies the DBH brand within its seals and oil seals line. If you are unsure about the application, send part number 1151 by WhatsApp or email and we will help confirm that this seal suits your equipment. You can also ask about other sizes in the same family.