DBH 8791 radial shaft seal — 35 x 50 x 8

DBH 8791 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 8791 and any equivalents.

The DBH 8791 is a radial shaft seal that sits in the housing bore and wipes against the turning shaft. Its job is twofold: hold oil or grease inside the assembly and keep dust, water and particles out. The size is given as shaft 35 mm, housing 50 mm, height 8.00 mm, and the seal follows the Lx design, meaning one lip with a spring. Gearboxes, pumps, motors and transmission units are the usual homes for a seal like this.

Reading the reference: the number 8791 is the designation for this item, and DBH is the brand MR supplies. The three figures that matter when you measure a used seal are d = 35 mm at the shaft, D = 50 mm at the housing bore and h = 8.00 mm overall. The Lx build is a single lip with a spring, made for rotating shafts that run with lubrication. Each seal arrives with its own identification, so the part can be traced back to the reference on the box.

Where it fits: gearboxes, centrifugal pumps, electric motors, rollers and power transmission equipment are common applications at this size. Whatever the machine, the seal separates the lubricated side from the environment. Treat it as a wear part. Oil weeping at the seal area, new noise or vibration around the housing are the signs that tell you to pull it and look at the lip.

Installation notes: the shaft and bore should be clean, with no burrs or scratches, and the shaft surface needs the hardness and roughness a radial shaft seal expects. Put a film of lubricant on the lip before you press it in, keep it square to the shaft and never hit the lip directly. Where contamination is heavy or temperatures run high, pick a lip compound that matches the fluid and the service temperature.

Need a cross for the 8791? Give us the part number plus the shaft, housing and height measurements. From there we can search the same radial seal category, keeping the Lx design or looking at a different lip type if your installation allows it. We can also help you settle on lip material and spring for the fluid and speed involved.

For a quote, message the part number 8791 to MR Industrial Accessories on WhatsApp or by email. We answer quickly and can point you to equivalents or help you choose. If anything about the replacement is unclear, send a photo of the old seal together with caliper readings and we will guide you from there.