DBH 9540 radial shaft seal — 38 x 51 x 5.7

DBH 9540 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 9540 and any equivalents.

The DBH 9540 is a radial lip seal sized for a 38 mm shaft, a 51 mm housing bore and a 5.70 mm height. Its Mx design is the familiar single-lip, spring-loaded pattern used on rotating shafts that run with permanent lubrication. Where space is tight, such as in gearboxes, pumps, electric motors and transmission equipment, this seal keeps lubricant in and keeps dust, water and particles out.

Reading the number is straightforward: DBH 9540 identifies the seal, and the three figures that matter are shaft 38 mm, housing 51 mm and width 5.70 mm. The Mx designation describes a single lip with a spring, built for rotating shaft service with continuous lubrication. The elastomeric lip rides on the shaft while the outer body holds an interference fit in the housing, so the seal stays put and the shaft becomes the running surface. Like any wear part, it eventually hardens or marks at the lip and begins to leak.

You will find this seal in gearboxes, centrifugal pumps, electric motors, rollers and power transmission equipment, wherever a shaft turns inside a lubricated housing. It also suits areas exposed to dust or splashes, where the job is both to hold lubricant and to block contaminants. Before specifying it for those conditions, confirm that the lip material suits the fluid in use and the operating temperature.

Selection and installation come down to matching the three dimensions: shaft diameter, housing bore and height. The shaft should sit within tolerance and have the right surface roughness; burrs, grooves or wear will cut the new lip as it goes in. Lubricate the lip beforehand, seat the seal perpendicular to the shaft, and drive it with a tube or bushing that presses on the outer body rather than the lip. If the housing has a radius or chamfer, check that the seal seats fully.

For a quote on an equivalent, send the code 9540 or the dimensions 38 x 51 x 5.70 on WhatsApp. From that, we can locate an alternative from the same brand or from another brand MR supplies, confirming the design, lip material and spring type. If the old seal carries no readable marking, a photo plus caliper readings from the shaft and housing are enough to work with.