DBH 5557 radial shaft seal — 42 x 56 x 7

DBH 5557 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 5557 and any equivalents.

When a pump, motor or gearbox starts weeping oil around the shaft, the DBH 5557 radial shaft seal is one of the sizes maintenance teams reach for. It is a lip seal built for rotating shafts, keeping lubricant where it belongs and blocking dust, water and other contaminants from working their way in. The size callout is 42 mm shaft, 56 mm housing bore and 7 mm height, in the Lz configuration. MR Industrial Accessories LLC offers it within its seals and oil seals range for industrial maintenance work.

The item carries DBH brand and part number 5557. Reading the size code is straightforward: d equals 42.00 mm at the shaft, D equals 56.00 mm at the housing bore, and h equals 7.00 mm in height. The Lz designation describes how the lip and metal case are put together within the oil seal family. This is a sealing element for rotary shafts, so it does not belong on linear motion or static face applications.

You will find this seal in centrifugal pumps, electric motors, gearboxes, conveyor rollers and power transmission equipment generally. In every case the job is the same: hold oil or grease inside the assembly and keep bearings and bushings shielded from outside contamination. Because it is a wear part, it typically comes out during preventive or corrective maintenance once leaks or dirt ingress show up.

Before pressing a new seal in, confirm the shaft and housing are clean and free of burrs or deep scoring. Coat the lip with the same oil or grease the equipment runs on. Seat it square to the shaft, without hitting the lip, using a tube or press that bears on the outer diameter. Where the shaft itself is worn, a seal with an auxiliary lip is worth considering. Speed, temperature and lubricant type ultimately decide the final choice, and those details are checked against the manufacturer's product page.

Looking for an equivalent? The quickest route is to send part number 5557 or the measurements of the seal you are pulling out. Shaft and housing dimensions, lubricant type and operating conditions all help. With that information, MR Industrial Accessories LLC can point you to the right option in the DBH line or in another brand the company supplies.

To get a quote on the DBH 5557 oil seal, message the part number on WhatsApp. The team answers promptly with the alternatives that suit your equipment. MR Industrial Accessories LLC carries this brand as part of its catalog of seals and oil seals for industry.