DBH 8258 radial shaft seal — 28 x 40 x 8

DBH 8258 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 8258 and any equivalents.

The DBH 8258 is a radial shaft seal built to keep lubricant in and contaminants out of rotating assemblies. Its Lr design combines a retaining lip with an elastomer body, and it presses into a cylindrical housing. The size code reads as a 28 mm shaft, a 40 mm housing bore and an 8.00 mm height.

When you look at the 8258 designation, the three figures behind it describe the fitting envelope: shaft 28 mm, housing 40 mm, width 8.00 mm. Those are the values to check against your equipment before ordering, because a radial shaft seal only works when the shaft and bore match its dimensions. The Lr configuration is intended for lubricated rotating shafts and is a standard replacement item for press-fit installation.

Typical locations include gearboxes, pumps, electric motors, compressors and other power transmission equipment. In these spots the seal holds oil or grease in place and blocks dust, water and particles from reaching bearings and guides. It suits shafts turning at moderate speeds under the temperature conditions normally found in industrial machinery.

Correct selection starts with measuring the shaft and housing. The shaft surface should be ground and free of burrs, and the housing should be clean with a proper lead-in chamfer. Lubricate the lip before pressing the seal in and use a support tube so the lip is not damaged. If a previous seal failed, inspect the shaft and housing for wear before installing the replacement.

To request a quote for code 8258 or the 28x40x8 mm size, send the part number or dimensions by WhatsApp or email. If you are working from another brand's reference, share that as well and the team can suggest an equivalent. You can also ask about other DBH oil seals in the same category.