DBH 8663 radial shaft seal — 40 x 52 x 7

DBH 8663 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 8663 and any equivalents.

The DBH 8663 is a radial shaft seal, also called a lip seal, that keeps lubricant in and contaminants out of rotating shaft assemblies. It measures 40 mm at the shaft, 52 mm at the housing and 7.00 mm in height, and its Mx design indicates a single lip with a spring. Pressed into a housing bore, it seals against the shaft in crankcases, covers and gear reducer boxes, helping protect bearings and bushings.

Within the DBH line, the code 8663 pins down this exact size. The three figures to check are shaft 40 mm, housing 52 mm and height 7.00 mm. The Mx designation covers a single-lip seal with spring, a configuration intended for lubricated rotating shafts. Installation is a press fit into the housing bore, with the lip riding on the shaft.

Typical installation points include gear reducer boxes, pumps, electric motors, transmission shafts and process equipment. The seal also suits locations where dust, water or chips are present, such as conveyors, mixers and machine tools. Its job is to hold lubricant in place and keep contaminants out, which helps bearings and gears reach their expected service life and reduces unplanned maintenance.

Before ordering, compare the shaft and housing dimensions with those of the seal being replaced. The Mx design fits medium-speed, low-pressure operation; for high peripheral speeds or higher pressures, ask about a reinforced alternative. When fitting the seal, apply lubricant to the lip, seat it without impact and confirm the shaft is free of burrs or wear that could cut the lip.

To quote code 8663, send the shaft diameter, housing diameter and height. With those three values we locate the equivalent seal in DBH or another brand we supply. We can also help when the installation space is tight or the original part has a non-standard geometry.

For a quote on the DBH 8663 oil seal, send the code by WhatsApp to MR Industrial Accessories. If you are unsure of the reference, a photo of the part or caliper readings works just as well. Our team will come back with the right option for your equipment.