DBH 5530 radial shaft seal — 31.75 x 57.15 x 12.7

DBH 5530 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 5530 and any equivalents.

The DBH 5530 is a single-lip radial shaft seal. It sits on the rotating shaft and presses into the housing bore, keeping lubricant inside the assembly while blocking dust, water and other particles from getting in. With a 31.75 mm shaft, 57.15 mm housing and 12.70 mm height, it fits gearboxes, pumps, electric motors and power transmission equipment. Since the lip wears over time, a hardened lip or visible oil loss means it is time for a replacement of the same size and design.

Reading the code is straightforward. The 5530 number stands for one specific set of dimensions: shaft 31.75 mm, housing 57.15 mm, width 12.70 mm. The Mz designation describes the construction variant of this series, which combines a sealing lip with a metal case made to be press-fitted into the housing. Because the number is tied to those three measurements, a seal that looks close in size is not automatically a valid substitute; the design type has to match as well.

Seals in this size range appear wherever a shaft turns inside an oil or grease sump: gearboxes, reducers, centrifugal pumps, electric motors, compressors, mixers, and chain or belt drives. In each case the seal does two jobs at the same time. It holds the lubricant in so it does not escape along the shaft, and it keeps contaminants out so they cannot reach and wear the bearings and gears.

Installation decides how long the seal lasts. Inspect the shaft first: no burrs, no deep scratches, no wear groove where the lip will ride. The housing bore should be clean and round. Coat the lip with the same oil or grease used in the unit, keep the seal square to the shaft, and press it in with a tube or spacer that pushes on the outer edge only, never on the lip. Driving it in at an angle or tapping one side at a time is the usual cause of early leaks.

When ordering, the fastest route is to send the full code together with caliper readings: shaft diameter, housing diameter and height. Those three figures let us locate an equivalent in the same DBH series or in another brand we supply, provided the dimensions and the design type line up. A photo of the old seal and the housing also helps confirm the variant. MR Industrial Accessories supplies bearings, housings, power transmission components, seals, bushings, installation tools and lubricants to customers in the United States and several Latin American countries, and our own manufacturing covers split plummer block housings, roller chains and sheaves. Send the 5530 code by WhatsApp or email and we will reply promptly, suggest equivalents and help you choose.