DBH 8771 radial shaft seal — 72 x 84 x 18/20.5

DBH 8771 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 8771 and any equivalents.

Part number 8771 belongs to the DBH line of radial shaft seals. It seats on a 72 mm shaft and presses into an 84 mm bore, and its height is stated as 18.00/20.50 mm. The A 103-Bidi designation points to a double-lip layout, so the seal works from both sides to hold lubricant in and keep dirt out. On gearboxes, pumps and motors, this small component is what protects the bearings and gears behind it.

Reading the code is the quickest way to confirm a match. The 8771 identifies the DBH item; the numbers that follow describe the fit: shaft 72 mm, housing 84 mm, height 18.00/20.50 mm. The A 103-Bidi suffix tells you the lip arrangement is double. In service, one lip rides the rotating shaft while the outer diameter holds the seal firmly in the bore, which is why this is a routine replacement item on maintenance schedules.

Typical applications are machines that turn continuously and must keep oil or grease where it belongs: gearboxes, centrifugal pumps, electric motors, reducers and conveyor rollers, along with agricultural equipment and process lines. A seal doing its job keeps leaks off the floor and blocks dust or water from reaching the bearing. Where vibration or moderate temperatures are present, choosing the right seal is what keeps unplanned maintenance downtime down.

Installation calls for a clean bore with no dents, and a shaft free of burrs or a worn track. Coat the lip with the same oil or grease the equipment runs on, then seat the seal squarely with a press or a tube sized to the outer diameter; never drive it in by hitting the lip. The 18.00/20.50 mm height leaves some axial room depending on how the housing is built. If the shaft shows a groove where the lip ran, a repair sleeve is worth considering.

For a replacement or an equivalent, the fastest route is to send part number 8771 or the three key dimensions: shaft diameter, housing diameter and height. With those figures we can check the DBH range or other options that do the same job. We can also tell you whether the A 103-Bidi configuration suits your application or whether another lip type or material would work better. The aim is to avoid equipment sitting idle over a sealing part.

To get a quote for the DBH 8771 seal, message the part number to MR Industrial Accessories on WhatsApp or by email. We help confirm the correct item and answer questions about fitting it. If you are working from a seal list for planned maintenance, send the part numbers and dimensions and we will put the whole inquiry together for you.