DBH 5211Pol radial shaft seal — 42 x 56 x 7

DBH 5211Pol 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 5211Pol and any equivalents.

A radial shaft seal like the DBH 5211Pol keeps lubricant where it belongs and keeps contaminants out of a rotating assembly. It sits press-fitted in the housing bore and its flexible lip rides against the shaft, absorbing small amounts of misalignment as it turns. Because the lip eventually wears, a seal that starts to weep should be swapped out early, before oil reaches the bearings or gears nearby.

The 5211Pol is a DBH radial shaft seal built to the designation A 136-R. Its three key measurements are a 42 mm shaft, a 56 mm housing bore and a 7.00 mm height. The outer body holds the seal firmly in the housing through an interference fit, while the elastomer lip and its internal spring keep constant contact with the shaft's running surface, so the sealing action happens at both the housing and the shaft.

Seals in this size range turn up in gearboxes, centrifugal pumps, electric motors, drive shafts, mixers and general process equipment, wherever oil has to stay in and dirt, water or particles have to stay out. You will also find them on conveyors, agricultural machinery and other plant equipment running continuously, as long as temperatures stay within what the lip compound can handle.

Installation calls for a clean shaft with no burrs or nicks and a running surface with the right roughness. The housing bore should be sound and at the correct diameter so the seal seats straight and press-fits properly. Put a little lubricant on the lip before sliding the shaft through, and do not hammer on the seal. If the previous seal was leaking, inspect bearing clearance and the shaft itself; a scored or worn shaft will take out a new seal quickly.

To get a quote on a replacement, send code 5211Pol or the three dimensions of the old seal, shaft, housing and height, over WhatsApp or email. A photo of the part and the housing also helps. With that information we look through the DBH line and other brands we supply to find a compatible option, focusing on matches with the same shaft and housing diameters.

MR Industrial Accessories LLC supplies the DBH brand. Send code 5211Pol through WhatsApp or email and our team will come back with the technical details you need to place your order.