DBH 6121Pol radial shaft seal — 30 x 52 x 7

DBH 6121Pol 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 6121Pol and any equivalents.

When a gearbox, pump or motor starts weeping oil around the shaft, the DBH 6121Pol seal is the part that usually goes back in. It is a single-lip radial shaft seal with an Mx-R body design, sized for a 30 mm shaft, a 52 mm housing bore and a 7.00 mm width. MR Industrial Accessories supplies this brand and can help you verify the size before you order.

Reading the reference is straightforward. The 6121Pol designation places the part inside the DBH line, and the three numbers that matter on the shelf are shaft 30 mm, housing 52 mm and width 7.00 mm. The Mx-R callout describes how the lip and the metal case are built, so it should match the seal you are pulling out. Quote the code exactly as printed when you ask for a replacement.

Seals in this size range turn up wherever a rotating shaft passes through a housing: reducers, centrifugal pumps, electric motors, mixers and conveyor drives. The lip holds grease or oil on the inside while keeping dust, water and particles out. That dual job is why these parts show up on preventive maintenance schedules and on repair lists whenever a unit is opened up.

Installation decides how long the replacement lasts. Inspect the shaft for burrs, nicks or a worn contact track, and make sure the bore is clean and round. Put a light film of lubricant on the lip, then press the seal in squarely so it sits perpendicular to the shaft and the lip is not rolled or distorted. When you select the part, match the fluid, the operating temperature and the shaft speed to the original specification; a mismatch in any of those will shorten seal life.

If you need a cross, send the code 6121Pol plus the shaft and housing dimensions, a photo of the old seal and the equipment it came from. With that information we can check alternatives in the same DBH line or in another brand we carry, and compare them against the manufacturer's data.

For a quote, message us on WhatsApp at MR Industrial Accessories with the code and dimensions. We respond promptly and can suggest equivalents or help you choose the right seal for the application.