DBH 9339 radial shaft seal — 30 x 72 x 8

DBH 9339 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 9339 and any equivalents.

A radial shaft seal such as the DBH 9339 sits in a housing bore and rides against a rotating shaft. Its job is twofold: hold lubricant where it belongs and keep dust, water and particles out of the assembly. The size on this reference is 30 mm at the shaft, 72 mm at the housing and 8 mm in height, a combination that shows up often on industrial drives. MR Industrial Accessories supplies this brand and can confirm whether it is the correct fit for your unit.

The designation for this part is 9339, from the DBH radial shaft seal line. Reading the dimensions in order: shaft 30 mm, housing 72 mm, width 8 mm. The Lx design describes the lip and body arrangement, which determines how the seal sits in its bore. Because the cross-section is compact, it suits transmission shafts, gearboxes, pumps and motors where oil has to stay separated from the surrounding environment.

Seals in this size range turn up in gear reducers, centrifugal pumps, electric motors, rollers and other transmission equipment. The duty is always the same: no lubricant escaping, no contaminants getting in to attack the bearings. One point worth remembering during a rebuild is that a new seal cannot compensate for a shaft that is worn, scored or running loose; the leak will come back. Check the shaft surface before you install the replacement.

Installation starts with confirming the bore and shaft match the 30 mm and 72 mm figures, and that the 8 mm width seats without being forced. Lubricate the lip, then drive the seal in squarely with a tube of the correct diameter rather than a hammer. Burrs or a groove on the shaft can cut the lip as it slides on, so deburr and clean first. Care at this stage matters as much as the seal itself.

For an equivalent, give us the reference 9339 plus the shaft, housing and height measurements. A photo of the removed seal or the assembly drawing also speeds things up. From there we can compare options in the same radial shaft seal category and tell you which one drops in without machining the housing.

DBH is one of the brands we supply. If the equipment is down, send the part number and dimensions through WhatsApp or email and our team will come back quickly with a quote, suggest equivalents and help you pick the right option.