DBH 6858Pol radial shaft seal — 30 x 42 x 7

DBH 6858Pol 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 6858Pol and any equivalents.

The DBH 6858Pol is a radial shaft seal built around a single lip, sized to sit on a rotating shaft and hold lubricant in while keeping dust, water and other particles out. Its A 156-R H configuration uses a spring-loaded lip, and its dimensions are 30 mm shaft, 42 mm housing and 7.00 mm height. It belongs to the seals and oil seals line that MR Industrial Accessories supplies for industrial maintenance work.

Reading the code helps when you are matching a seal to a piece of equipment. DBH identifies the radial shaft seal family, 6858Pol is the item designation, and the three figures that follow describe the bore it fits: shaft 30 mm, housing 42 mm, width 7.00 mm. The A 156-R H designation refers to the lip and spring arrangement, which keeps the sealing edge in steady contact with the shaft as it turns. The seal comes with its factory identification and traceability as supplied by DBH, a brand MR carries.

Seals in this size range show up wherever a shaft turns inside a housing and the oil or grease has to stay separated from the surrounding environment. Typical locations include gearboxes, centrifugal pumps, electric motors, compressors, mixers and machine tools. You will also find them on agricultural implements and on chain or belt drive equipment, where dust and moisture are the main reasons bearings fail early when sealing is poor.

Installation is where most seal problems start. Check the shaft for burrs, scratches or a polished wear track, and make sure the housing is clean and not deformed. Lubricate the lip before pressing the seal in, and drive it with a tube that contacts the outer edge rather than the lip itself. If the shaft is already worn at the contact point, a repair sleeve or a different size may be the better route so the new seal is not damaged on startup.

If you are replacing a seal and only have the old part in hand, send the code 6858Pol or the three measurements. With that information we can look through the DBH seals line and check compatible alternatives. We can also tell you whether the A 156-R H lip and spring design suits your application or whether a different lip profile or material would serve the operating conditions better.

Quotes are handled by WhatsApp or email. Send the code and the quantity you need, and the team replies promptly with the product data. Technical questions about sizing or installation are welcome as well, and we can help confirm that this is the right seal for the equipment you are working on.