DBH 8398 radial shaft seal — 55 x 72 x 7.5

DBH 8398 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 8398 and any equivalents.

A radial shaft seal like the DBH 8398 keeps lubricant inside the assembly and keeps dust, water and particles out. It works as a lip seal: the lip rides on the rotating shaft while the outer diameter sits in the housing bore. Its designation already tells you the three values that matter, 55 mm for the shaft, 72 mm for the housing and 7.50 mm for the height, which places it in medium-section shaft work such as gearboxes, pumps and electric motors. MR Industrial Accessories supplies this brand and can verify the size with you before you send a quote request.

Read the code first. The numbers in the DBH 8398 designation are the shaft diameter at 55.00 mm, the housing bore at 72.00 mm and the height at 7.50 mm. The Lx design points to a single lip with a spring, a configuration meant for rotating shafts that run with continuous lubrication. Sealing happens where the lip contacts the shaft, while the outer diameter holds the seal in the housing; both surfaces together determine how well the part performs. If the size matches your equipment, code 8398 is what you send us to start the inquiry.

Seals in this size range show up in gearboxes, centrifugal pumps, electric motors, rollers and power transmission equipment. In each case the job is the same: hold oil or grease in and keep contaminants out. A worn seal usually announces itself through lubricant loss or a friction noise, and it is worth handling before the bearings or gears around it are affected.

Installation matters as much as the part. Inspect the shaft for burrs, deep marks and the correct roughness in the contact zone, and make sure the housing is clean and undistorted. Lubricate the lip before fitting, then drive the seal in with a flat tool that presses on the outer diameter, never on the lip. If a previous seal failed early, check housing ventilation and shaft alignment as well; repeat failures often trace back to those two points rather than to the seal.

For a quote on code 8398, send the dimensions of the old seal, meaning shaft diameter, housing diameter and height, or a photo of the part showing the stamped number. With that information we can locate the equivalent in the DBH line or in other brands we carry. We can also tell you whether the Lx design suits your application or whether a different lip type or material would be a better fit.