DBH 5277 radial shaft seal — 55 x 90 x 13

DBH 5277 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 5277 and any equivalents.

Part number 5277 is a radial shaft seal from the DBH line. It sits in the housing bore and works against the rotating shaft, keeping lubricant in and keeping dust, water and particles out. The three dimensions to check are shaft 55.00 mm, housing 90.00 mm and height 13.00 mm, and the lip and metal body follow the Lx design. Sizes like this show up in gearboxes, pumps, electric motors and power transmission equipment. MR Industrial Accessories supplies this brand and can help you confirm which variant matches your equipment.

A seal of this type pairs an elastomeric lip with a rigid reinforcement, and that reinforcement is what holds the lip in contact with the moving shaft. Because the Lx design sets both the lip geometry and the body shape, it is worth keeping that designation when you order a replacement. Reading the code is straightforward: 5277 identifies the item, and the three measurements that follow describe where it fits.

You will find this size on equipment built around transmission shafts. Gearboxes and reducers are common, along with centrifugal pumps, electric motors, mixers and machine tools. Rollers, conveyors and other process equipment also use it wherever a shaft turns continuously and the bearings behind it need protection. The job is always the same: hold oil or grease inside the assembly and block contamination from the outside.

Before fitting a new seal, look at the shaft surface for burrs, deep scratches or wear across the contact band, and make sure the housing bore is clean and not deformed. Lubricate the lip, then seat the seal square to the shaft rather than driving it in at an angle. Speed, operating temperature and the lubricant in use all affect how long the lip lasts, so factor them in when you pick a replacement. A worn shaft may call for a wear sleeve or a different size.

To get a quote on part number 5277, send the shaft, housing and height dimensions, and a photo of the old part if you have one. Tell us the equipment it comes from and the fluid it seals as well. With that information we can review options within the DBH line or from other brands we carry and confirm what fits without reworking the housing or the shaft.