DBH 8122Pol radial shaft seal — 145 x 170 x 15/20

DBH 8122Pol 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 8122Pol and any equivalents.

Sealing a rotating shaft comes down to matching the seal to the bore and the shaft it runs on. The DBH 8122Pol is a single-lip radial shaft seal built for that job: it holds lubricant in and keeps dust, moisture and particles out. You will find it in gearboxes, pumps, motors and other equipment where shafts turn in bearings or bushings. The A 203 design and the 15.00/20.00 mm height suit housings with a shoulder or assemblies that call for a longer lip.

The 8122Pol designation identifies this seal within the DBH line and points to a single-lip radial shaft seal. Its three key measurements are a 145 mm shaft, a 170 mm housing and a 15.00/20.00 mm height. The A 203 design refers to a particular construction within that line. In service, an elastomer lip rides against the rotating shaft while the outer body stays seated in the cavity on an interference fit. Because the height is variable, the same seal can fit housings of different depths.

Where does this seal fit? Gearboxes, speed reducers, centrifugal pumps, electric motors, compressors and transmission equipment are the usual spots, along with agricultural machinery, mining equipment and hydraulic systems exposed to dust, water or chips. In each case the seal keeps the lubricant where it belongs and blocks outside contamination, which protects the bearings and avoids leaks that drag down performance.

Selection rests on four things: shaft diameter, housing diameter, height and design type. The shaft should be ground to adequate hardness, and the housing needs the recommended chamfer and surface roughness. During installation, use tools that will not nick the lip, and coat the lip with the same oil or grease the equipment runs on before pressing it in. If the shaft is already worn, an auxiliary lip or a wear sleeve is worth considering.

Looking for an equivalent? Send the code 8122Pol or the dimensions 145x170x15/20 on WhatsApp. We can search other brands or series where dimensions and design line up, and we can talk through lubricant compatibility and operating conditions. Speed, temperature and pressure all shape the final choice, so have those figures handy. MR Industrial Accessories LLC supplies the DBH brand and serves customers across the United States and in Latin America.